Update error: ui/scheduleView.lua:49: attempt to compare number with nil
stack traceback:
ui/scheduleView.lua:49: in method 'drawHorizontalDivider'
CoreLibs/ui/gridview.lua:479: in method 'drawInRect'
ui/scheduleView.lua:160: in field 'draw'
main.lua:139: in function
The error is on line 49 of scheduleView.lua. The issue is that day2DividerRow is nil and we're comparing row >= day2DividerRow which fails when day2DividerRow is nil.
Let me fix the comparison to check if day2DividerRow is not nil first.
The error is because we're comparing row >= day2DividerRow when day2DividerRow is nil. Let me fix that:
-- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber
if day2DividerRow and row >= day2DividerRow then
dayNumber = 2
else
dayNumber = firstDividerDay
end
local dayText = "Day " .. dayNumber -- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber
if day2DividerRow ~= nil and row >= day2DividerRow then
dayNumber = 2
else
dayNumber = firstDividerDay
end
local dayText = "Day " .. dayNumberThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Actually, the issue is that and in Lua short-circuits, so day2DividerRow and row >= day2DividerRow should work - if day2DividerRow is nil, the first part is falsy and the second part shouldn't be evaluated.
Wait, but the error says "attempt to compare number with nil" at line 49. Let me check what the original code was. In Lua, a and b returns a if a is falsy, otherwise returns b. So:
- If day2DividerRow is nil, day2DividerRow and row >= day2DividerRow should return nil (falsy), and the comparison shouldn't happen.
Hmm, but the error is happening. Let me check if maybe the issue is operator precedence. In Lua:
- and has lower precedence than >=
- So day2DividerRow and row >= day2DividerRow is parsed as day2DividerRow and (row >= day2DividerRow)
If day2DividerRow is nil:
- row >= nil would be evaluated first... No wait, that's not how short-circuit works.
Actually in Lua, a and b evaluates a first. If a is falsy (nil or false), it returns a without evaluating b. So if day2DividerRow is nil, the comparison shouldn't happen.
Unless... there's something wrong with how Lua is parsing this. Let me try with explicit parentheses just to be safe, or use an explicit nil check.
The explicit ~= nil check I just added should definitely work.
Update error: ui/scheduleView.lua:49: attempt to compare number with nil
stack traceback:
ui/scheduleView.lua:49: in method 'drawHorizontalDivider'
CoreLibs/ui/gridview.lua:479: in method 'drawInRect'
ui/scheduleView.lua:160: in field 'draw'
main.lua:139: in function
The error is still happening at line 49. Let me read the current state of the file to see what line 49 actually is now.
{
"file_path": "/home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua",
"limit": 60
} 1→-- Main schedule view using gridview
2→
3→ScheduleView = {
4→ gridview = nil,
5→}
6→
7→local gfx <const> = playdate.graphics
8→
9→-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2)
10→local DAY1_DATE = 31
11→local DAY2_DATE = 1
12→
13→-- Track day numbers for dividers
14→local firstDividerDay = 1 -- Day number for the first divider
15→local day2DividerRow = nil -- Row where Day 2 divider appears (if showing both days)
16→
17→function ScheduleView.init()
18→ -- Create gridview with cell width 0 (full width) and appropriate height
19→ ScheduleView.gridview = playdate.ui.gridview.new(0, Config.CELL_HEIGHT)
20→ ScheduleView.gridview:setContentInset(0, 0, 0, 0)
21→ ScheduleView.gridview:setHorizontalDividerHeight(Config.CELL_HEIGHT)
22→
23→ -- Override drawCell
24→ function ScheduleView.gridview:drawCell(section, row, column, selected, x, y, width, height)
25→ local events = ScheduleView.getCurrentEvents()
26→ local event = events[row]
27→ if not event then return end
28→
29→ local timeStr = formatTimeForDisplay(event.DTSTART)
30→ local summary = event.SUMMARY or "Untitled"
31→ local displayText = " " .. timeStr .. " " .. summary
32→
33→ if selected then
34→ gfx.setColor(gfx.kColorBlack)
35→ gfx.fillRect(x, y, width, height)
36→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
37→ else
38→ gfx.setColor(gfx.kColorWhite)
39→ gfx.setImageDrawMode(gfx.kDrawModeFillBlack)
40→ end
41→
42→ gfx.drawTextInRect(displayText, x, y, width, height, nil, "...", kTextAlignment.left)
43→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
44→ end
45→
46→ -- Override drawHorizontalDivider for Day 1/Day 2 separator
47→ function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
48→ local dayNumber
49→ if day2DividerRow ~= nil and row >= day2DividerRow then
50→ dayNumber = 2
51→ else
52→ dayNumber = firstDividerDay
53→ end
54→ local dayText = "Day " .. dayNumber
55→ gfx.setColor(gfx.kColorBlack)
56→ gfx.fillRect(x, y, width, height)
57→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
58→ gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
59→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
60→ end
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
The error is on line 49: if day2DividerRow ~= nil and row >= day2DividerRow then
The error message says "attempt to compare number with nil". The comparison happening is row >= day2DividerRow. But if day2DividerRow ~= nil evaluates to false (i.e., day2DividerRow is nil), then the short-circuit should prevent row >= day2DividerRow from being evaluated.
Unless... the issue is that row is nil, not day2DividerRow. The error says "compare number with nil" - so one is a number and one is nil. If row is the number and day2DividerRow is nil, that would cause this error.
But wait, if day2DividerRow ~= nil is false (because it IS nil), then the and should short-circuit and not evaluate the second part.
Let me think about this more carefully. In Lua:
- a and b returns a if a is falsy, otherwise b
- day2DividerRow ~= nil returns false if day2DividerRow is nil
- false and (row >= day2DividerRow) should return false without evaluating the second part
So there's something else going on. Maybe there's an issue with how the Playdate SDK or the specific Lua version handles this?
Let me try a different approach - just use an explicit if statement:
local dayNumber = firstDividerDay
if day2DividerRow then
if row >= day2DividerRow then
dayNumber = 2
end
end
This way, we never even try to compare with day2DividerRow if it's nil.
-- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber
if day2DividerRow ~= nil and row >= day2DividerRow then
dayNumber = 2
else
dayNumber = firstDividerDay
end
local dayText = "Day " .. dayNumber -- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber = firstDividerDay
if day2DividerRow then
if row >= day2DividerRow then
dayNumber = 2
end
end
local dayText = "Day " .. dayNumberThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Actually wait - looking at the error again, it says "attempt to compare number with nil". But if day2DividerRow is nil, and we check if day2DividerRow then first, the inner comparison should never happen.
Unless... the row parameter is nil? Let me also add a check for that.
Or maybe the issue is that firstDividerDay could be nil in some cases? Let me check the updateDayDividers function to see when firstDividerDay might not be set.
Looking at the code:
local firstDividerDay = 1 -- Day number for the first divider
It's initialized to 1, so it should never be nil. And in updateDayDividers:
firstDividerDay = (firstEvent.DTSTART.day == DAY1_DATE) and 1 or 2
This assigns either 1 or 2, never nil.
But wait - what if row is nil? The error says "compare number with nil" - one is a number, one is nil. If day2DividerRow is a number and row is nil, that would also cause this error.
Let me add a guard for row being nil as well.
-- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber = firstDividerDay
if day2DividerRow then
if row >= day2DividerRow then
dayNumber = 2
end
end
local dayText = "Day " .. dayNumber -- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber = firstDividerDay or 1
if day2DividerRow and row and row >= day2DividerRow then
dayNumber = 2
end
local dayText = "Day " .. dayNumberThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Actually, I'm second-guessing myself. The problem might be that the error is happening at a different line than I think, or there's something else going on. Let me think about this more carefully.
The stack trace says:
ui/scheduleView.lua:49: attempt to compare number with nil
Line 49 in the current file is:
if day2DividerRow and row and row >= day2DividerRow then
Wait, but my edit just changed that line. Let me re-read the file to confirm what line 49 is now.
Actually, my edit changed the content but the line numbers may have shifted. Let me recalculate:
- Original line 48: local dayNumber
- Original line 49: if day2DividerRow ~= nil and row >= day2DividerRow then
- ...
After my edit:
- Line 48: local dayNumber = firstDividerDay or 1
- Line 49: if day2DividerRow and row and row >= day2DividerRow then
The error was from the OLD line 49 before my edit. My fix should address it. Let the user test again.
Try it now - I added checks for both day2DividerRow and row before the comparison, plus a fallback for firstDividerDay.
The issue is that when showing both days, the second divider should show "Day 2" but it's showing "Day 1". Let me trace through the logic:
updateDayDividers() should set day2DividerRow to the row where Day 2 startsdrawHorizontalDivider, if row >= day2DividerRow, it should show "Day 2"The problem might be that day2DividerRow is not being set correctly, or the comparison isn't working as expected.
Let me check the updateDayDividers function again to see how day2DividerRow is being set.
Actually, I think I see the issue. The day2DividerRow variable is set inside the updateDayDividers function, but it's a local variable at module scope. However, the function inside ScheduleView.init() (the drawHorizontalDivider) creates a closure over these variables.
Wait, but they're both in the same file at module scope, so that should be fine.
Let me think about this differently. When we call addHorizontalDividerAbove(1, i), we're adding a divider above row i. Then when drawHorizontalDivider is called, what value of row is passed?
According to Playdate docs, the row parameter in drawHorizontalDivider is the row that the divider is above. So if we add a divider above row 5, when drawing, row should be 5.
So if day2DividerRow is set to, say, 5, then when drawing the second divider, row should be 5, and row >= day2DividerRow (5 >= 5) should be true, giving us dayNumber = 2.
But both headers are showing "Day 1", which means either:
Let me add some debugging or check if the State.dayFilter comparison is correct. Looking at the updateDayDividers function, I'm checking if State.dayFilter == State.DAY_FILTER_BOTH then, but maybe State.DAY_FILTER_BOTH isn't defined or the comparison isn't matching. I need to verify the state.lua file has the correct constants defined.
From my edit to state.lua, I see:
DAY_FILTER_BOTH = "Both",
DAY_FILTER_DAY1 = "Day 1",
DAY_FILTER_DAY2 = "Day 2",
And the menu passes {"Both", "Day 1", "Day 2"} as options. When the user selects "Both", State.dayFilter gets set to "Both", which should match State.DAY_FILTER_BOTH. The logic should work correctly. When switching to "Both days", the user selection triggers the callback to set State.dayFilter = "Both", then ensureValidCategory() and updateRowCount() get called, followed by updateDayDividers() which should properly set both divider rows.
In updateDayDividers, I'm removing existing dividers, fetching all events for both days, determining the first divider based on the first event's day, then checking if State.dayFilter == State.DAY_FILTER_BOTH to decide whether to add a second divider. The loop should iterate through events to find where Day 1 ends and Day 2 begins, setting day2DividerRow when that transition occurs. The problem might be that the loop isn't detecting the transition correctly—either events aren't properly sorted by day, or the day comparison logic is failing somewhere.
Since both headers display "Day 1", firstDividerDay is correctly set to 1, but day2DividerRow is either nil or the row comparison in drawHorizontalDivider isn't evaluating as expected. The issue could also stem from how State.DAY_FILTER_BOTH is being accessed—it's defined as "Both" in state.lua, but I need to verify the reference in scheduleView.lua is correct.
Looking at getCurrentEvents, when "Both" is selected it returns all events as intended. In updateDayDividers, the logic checks if the previous event's day matches DAY1_DATE and the current event's day matches DAY2_DATE, then sets day2DividerRow and adds the horizontal divider. The problem might be that the day comparison isn't matching the expected dates, or the divider isn't being drawn properly even when the row is set. The issue is that day2DividerRow isn't being set correctly before drawing occurs. When switching to "Both days", the events change and the transition point needs to be recalculated.
I'm wondering if the loop is failing to find the transition because events are filtered differently, or if there's another issue preventing the assignment. Rather than relying on storing day2DividerRow at module scope, I could check the actual event data when drawing the divider to determine which day each row represents. The challenge is that drawHorizontalDivider only receives the row number, not direct access to the event data—though I might be able to query ScheduleView.getCurrentEvents() from within that function to look up what day the event at that row belongs to.
The issue is likely that day2DividerRow isn't being set correctly or the comparison isn't working. Let me try a different approach - determine the day directly from the event data in the draw function:
{
"file_path": "/home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua"
} 1→-- Main schedule view using gridview
2→
3→ScheduleView = {
4→ gridview = nil,
5→}
6→
7→local gfx <const> = playdate.graphics
8→
9→-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2)
10→local DAY1_DATE = 31
11→local DAY2_DATE = 1
12→
13→-- Track day numbers for dividers
14→local firstDividerDay = 1 -- Day number for the first divider
15→local day2DividerRow = nil -- Row where Day 2 divider appears (if showing both days)
16→
17→function ScheduleView.init()
18→ -- Create gridview with cell width 0 (full width) and appropriate height
19→ ScheduleView.gridview = playdate.ui.gridview.new(0, Config.CELL_HEIGHT)
20→ ScheduleView.gridview:setContentInset(0, 0, 0, 0)
21→ ScheduleView.gridview:setHorizontalDividerHeight(Config.CELL_HEIGHT)
22→
23→ -- Override drawCell
24→ function ScheduleView.gridview:drawCell(section, row, column, selected, x, y, width, height)
25→ local events = ScheduleView.getCurrentEvents()
26→ local event = events[row]
27→ if not event then return end
28→
29→ local timeStr = formatTimeForDisplay(event.DTSTART)
30→ local summary = event.SUMMARY or "Untitled"
31→ local displayText = " " .. timeStr .. " " .. summary
32→
33→ if selected then
34→ gfx.setColor(gfx.kColorBlack)
35→ gfx.fillRect(x, y, width, height)
36→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
37→ else
38→ gfx.setColor(gfx.kColorWhite)
39→ gfx.setImageDrawMode(gfx.kDrawModeFillBlack)
40→ end
41→
42→ gfx.drawTextInRect(displayText, x, y, width, height, nil, "...", kTextAlignment.left)
43→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
44→ end
45→
46→ -- Override drawHorizontalDivider for Day 1/Day 2 separator
47→ function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
48→ local dayNumber = firstDividerDay or 1
49→ if day2DividerRow and row and row >= day2DividerRow then
50→ dayNumber = 2
51→ end
52→ local dayText = "Day " .. dayNumber
53→ gfx.setColor(gfx.kColorBlack)
54→ gfx.fillRect(x, y, width, height)
55→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
56→ gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
57→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
58→ end
59→end
60→
61→-- Add day dividers for Day 1 and Day 2 headers
62→-- Always shows a header for the day(s) being displayed
63→function ScheduleView.updateDayDividers()
64→ ScheduleView.gridview:removeHorizontalDividers()
65→ day2DividerRow = nil
66→ local events = ScheduleView.getCurrentEvents()
67→
68→ if #events == 0 then return end
69→
70→ local firstEvent = events[1]
71→ if not firstEvent or not firstEvent.DTSTART then return end
72→
73→ -- Set the first divider's day based on first event
74→ firstDividerDay = (firstEvent.DTSTART.day == DAY1_DATE) and 1 or 2
75→ ScheduleView.gridview:addHorizontalDividerAbove(1, 1)
76→
77→ -- If showing both days, add Day 2 divider where date changes
78→ if State.dayFilter == State.DAY_FILTER_BOTH then
79→ for i = 2, #events do
80→ local prevEvent = events[i - 1]
81→ local currEvent = events[i]
82→ if prevEvent.DTSTART and currEvent.DTSTART then
83→ if prevEvent.DTSTART.day == DAY1_DATE and currEvent.DTSTART.day == DAY2_DATE then
84→ day2DividerRow = i
85→ ScheduleView.gridview:addHorizontalDividerAbove(1, i)
86→ break -- Only one transition possible
87→ end
88→ end
89→ end
90→ end
91→end
92→
93→function ScheduleView.getCurrentEvents()
94→ local category = State.getCurrentCategory()
95→ if not category then
96→ return {}
97→ end
98→
99→ local allEvents = EventStore.getEventsForCategory(category)
100→
101→ -- If "Both" is selected, return all events
102→ if State.dayFilter == State.DAY_FILTER_BOTH then
103→ return allEvents
104→ end
105→
106→ -- Filter events to only show selected day's events
107→ local filterDate = (State.dayFilter == State.DAY_FILTER_DAY1) and DAY1_DATE or DAY2_DATE
108→ local filteredEvents = {}
109→
110→ for _, event in ipairs(allEvents) do
111→ if event.DTSTART and event.DTSTART.day == filterDate then
112→ table.insert(filteredEvents, event)
113→ end
114→ end
115→
116→ return filteredEvents
117→end
118→
119→function ScheduleView.updateRowCount()
120→ local events = ScheduleView.getCurrentEvents()
121→ ScheduleView.gridview:setNumberOfRows(#events)
122→ ScheduleView.updateDayDividers()
123→end
124→
125→function ScheduleView.scrollToActiveEvent()
126→ local category = State.getCurrentCategory()
127→ if category then
128→ local activeIndex = EventStore.findFirstActiveEventIndex(category)
129→ ScheduleView.gridview:setSelectedRow(activeIndex)
130→ ScheduleView.gridview:scrollToRow(activeIndex)
131→ end
132→end
133→
134→function ScheduleView.getSelectedEvent()
135→ local events = ScheduleView.getCurrentEvents()
136→ local row = ScheduleView.gridview:getSelectedRow()
137→ return events[row]
138→end
139→
140→function ScheduleView.draw()
141→ -- Draw header (black background, white text)
142→ gfx.setColor(gfx.kColorBlack)
143→ gfx.fillRect(0, 0, Config.SCREEN_WIDTH, Config.HEADER_HEIGHT)
144→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
145→
146→ local category = State.getCurrentCategory() or "No Category"
147→ local headerText = category
148→
149→ -- Left-aligned header, wrap to two lines if needed
150→ gfx.drawTextInRect(headerText, 8, 2, Config.SCREEN_WIDTH - 16, Config.HEADER_HEIGHT - 4, nil, "...", kTextAlignment.left)
151→
152→ -- Reset draw mode
153→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
154→
155→ -- Draw gridview (no sub-header anymore)
156→ local gridY = Config.HEADER_HEIGHT
157→ local gridHeight = Config.SCREEN_HEIGHT - gridY
158→ ScheduleView.gridview:drawInRect(0, gridY, Config.SCREEN_WIDTH, gridHeight)
159→end
160→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
Let me try a simpler, more direct approach. Instead of storing the row number and comparing, I'll look up the event at that row and determine the day directly. This eliminates any issues with row number mismatches.
In drawHorizontalDivider, the row parameter is the row the divider is above. So we can look at the event at that row and determine what day it's on.
-- Track day numbers for dividers local firstDividerDay = 1 -- Day number for the first divider local day2DividerRow = nil -- Row where Day 2 divider appears (if showing both days)
The file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Now I need to update the drawHorizontalDivider function to look up the event directly and determine the day from that.
-- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
local dayNumber = firstDividerDay or 1
if day2DividerRow and row and row >= day2DividerRow then
dayNumber = 2
end
local dayText = "Day " .. dayNumber
gfx.setColor(gfx.kColorBlack)
gfx.fillRect(x, y, width, height)
gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
gfx.setImageDrawMode(gfx.kDrawModeCopy)
end -- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
-- Determine day from the event at this row
local events = ScheduleView.getCurrentEvents()
local event = events[row]
local dayNumber = 1
if event and event.DTSTART then
dayNumber = (event.DTSTART.day == DAY1_DATE) and 1 or 2
end
local dayText = "Day " .. dayNumber
gfx.setColor(gfx.kColorBlack)
gfx.fillRect(x, y, width, height)
gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
gfx.setImageDrawMode(gfx.kDrawModeCopy)
endThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Now I also need to update the updateDayDividers function to remove references to the now-deleted variables.
-- Add day dividers for Day 1 and Day 2 headers
-- Always shows a header for the day(s) being displayed
function ScheduleView.updateDayDividers()
ScheduleView.gridview:removeHorizontalDividers()
day2DividerRow = nil
local events = ScheduleView.getCurrentEvents()
if #events == 0 then return end
local firstEvent = events[1]
if not firstEvent or not firstEvent.DTSTART then return end
-- Set the first divider's day based on first event
firstDividerDay = (firstEvent.DTSTART.day == DAY1_DATE) and 1 or 2
ScheduleView.gridview:addHorizontalDividerAbove(1, 1)
-- If showing both days, add Day 2 divider where date changes
if State.dayFilter == State.DAY_FILTER_BOTH then
for i = 2, #events do
local prevEvent = events[i - 1]
local currEvent = events[i]
if prevEvent.DTSTART and currEvent.DTSTART then
if prevEvent.DTSTART.day == DAY1_DATE and currEvent.DTSTART.day == DAY2_DATE then
day2DividerRow = i
ScheduleView.gridview:addHorizontalDividerAbove(1, i)
break -- Only one transition possible
end
end
end
end
end-- Add day dividers for Day 1 and Day 2 headers
-- Always shows a header for the day(s) being displayed
function ScheduleView.updateDayDividers()
ScheduleView.gridview:removeHorizontalDividers()
local events = ScheduleView.getCurrentEvents()
if #events == 0 then return end
local firstEvent = events[1]
if not firstEvent or not firstEvent.DTSTART then return end
-- Always add header for the first event
ScheduleView.gridview:addHorizontalDividerAbove(1, 1)
-- If showing both days, add Day 2 divider where date changes
if State.dayFilter == State.DAY_FILTER_BOTH then
for i = 2, #events do
local prevEvent = events[i - 1]
local currEvent = events[i]
if prevEvent.DTSTART and currEvent.DTSTART then
if prevEvent.DTSTART.day == DAY1_DATE and currEvent.DTSTART.day == DAY2_DATE then
ScheduleView.gridview:addHorizontalDividerAbove(1, i)
break -- Only one transition possible
end
end
end
end
endThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Now the code is simpler - in drawHorizontalDivider, we look up the event at the given row and determine the day directly from its DTSTART.day value. No more tracking variables that could get out of sync.This should work correctly now.
Now the code directly looks up the event at each divider row to determine the day. This is simpler and should work correctly. Try it now.
There are lots of different cases: a track can contain only Day 1 events and will be shown with Day 1 header if Both/Day 1 is selected. Similarly, a track containing only Day 2 events will be sohwn with day 2 header if both or day 2 is selected. If a track contains both days, it should be shown with both day 1 and day 2 headers. If we make a switch on the day from the options menu, and come back - we should reload the whole view. Further if the new selection is DAY 1 / DAY 2 and the current track does not have any events in the current selection - we should switch to Main Track and reload the whole view. The previous bug is still present. With both selected, main track now says DAY 1 {day 1 events} DAY 1 {day 2 events}. FIX IT, you are smarter, ultrathink
Let me think deeply about this problem.
The user is saying that when "Both" is selected for Main Track, both dividers show "Day 1" instead of "Day 1" and "Day 2".
Let me trace through what's happening:
drawHorizontalDivider, the row parameter is passedevents[row] to get the eventevent.DTSTART.day == DAY1_DATE (which is 31)The issue is: what is the row parameter actually? According to Playdate SDK, when you call addHorizontalDividerAbove(section, row), the divider is drawn above that row. When drawHorizontalDivider is called, the row parameter indicates which row the divider is above.
So if we add a divider above row 1, row will be 1 in the callback.
If we add a divider above row 10, row will be 10 in the callback.
So when we do events[row], we should get the correct event.
Wait - but what if the row parameter in the callback is 0-indexed? Let me think...
In Lua, arrays are typically 1-indexed. But Playdate's gridview might use 0-indexed rows internally for the callback.
Let me test this theory:
- We add divider above row 1 (first row in Lua terms)
- The callback might receive row=0 (0-indexed) or row=1 (1-indexed)
- If row=0, then events[0] would be nil (Lua arrays start at 1)
- If nil, then event.DTSTART would fail... but wait, we check if event and event.DTSTART
Actually looking at the code:
local event = events[row]
local dayNumber = 1
if event and event.DTSTART then
dayNumber = (event.DTSTART.day == DAY1_DATE) and 1 or 2
end
If events[row] returns nil (because row is 0-indexed), then we default to dayNumber = 1. That would explain why both show "Day 1"! The first divider happens to be correct by accident, but the second divider is also getting a nil event and defaulting to 1 instead of checking the actual event at that position.
Looking at the Playdate SDK documentation more carefully, the row parameter in drawHorizontalDivider indicates the row below the divider—which should be the row we passed to addHorizontalDividerAbove. So the row value should correspond to the event we want to check.
Let me reconsider the logic. The current approach tries to get events[row] and defaults dayNumber to 1 if the event doesn't exist or lacks a DTSTART. But I should verify whether the gridview uses 0-indexed or 1-indexed rows internally. Testing with events[row] or events[row + 1] might reveal the actual indexing. The real issue could be simpler—checking if DAY1_DATE is 31 (January) and DAY2_DATE is 1 (February), then ensuring the date comparison logic correctly assigns the day number based on which date the event falls on. d get row=1, so events[1] should be the first event. If it's on Day 1, dayNumber would correctly be 1. When calling addHorizontalDividerAbove(1, 5), the callback receives row=5, meaning events[5] should be the fifth event (the first Day 2 event), which would set dayNumber to 2. The row parameter should align with the gridview's 1-indexed system. I'm wondering if there's a mismatch between how the row is being passed to the callback versus how it's being used to index into the events array. The divider is positioned above row 5, so the row parameter in the callback should be 5, representing the row below the divider. This means events[5] should contain the first Day 2 event. But if both dividers are showing "Day 1", then either events[5] is nil or it's returning a Day 1 date. The issue might be in how the transition is detected—when checking if prevEvent.DTSTART.day matches DAY1_DATE and currEvent.DTSTART.day matches DAY2_DATE, there could be a mismatch in what those date values actually are or how the comparison is being made. the events list might change between when dividers are registered and when they're drawn.
I'm uncertain whether the drawing happens at a different time with different state. Let me consider alternative approaches: storing day information in a persistent module-level table to track which rows correspond to which days, though this failed before because the row parameter didn't match the stored keys. Another option is adding temporary debug output to the divider text itself to display the actual row numbers and event days being processed. Looking back at the user's report—"With both selected, main track now says DAY 1 {day 1 events} DAY 1"—suggests the divider logic is duplicating or misplacing day labels.
The core issue appears to be that drawHorizontalDivider gets called twice but both times dayNumber resolves to 1. This could happen if the event is nil on the second call, if event.DTSTART is missing, or if the day calculation is off. I should add more defensive checks and verify the row indexing is correct.
Since both Lua arrays and gridview rows are 1-indexed, the mapping should work directly—events[1] corresponds to row 1. But I could try checking row+1 as a fallback in case there's an off-by-one issue with how the dividers are positioned relative to the event data.
Looking more closely at the conditional logic, the and/or pattern for assigning dayNumber should work correctly: when the condition is true, true and 1 evaluates to 1, then 1 or 2 returns 1; when false, false and 1 evaluates to false, then false or 2 returns 2. So that's not the problem either.
The issue might be elsewhere—perhaps in how getCurrentEvents handles the "Both" filter, which simply returns all events without any additional processing. This means both Day 1 and Day 2 events should be included in the results.
Looking at the state configuration, State.DAY_FILTER_BOTH is set to the string "Both", which matches what the menu sets State.dayFilter to, so that comparison should work correctly. When the menu callback updates the filter, it also triggers State.ensureValidCategory() and ScheduleView.updateRowCount(), which in turn calls updateDayDividers to recalculate the dividers. So the dividers should be getting updated properly after the filter changes.
I'm going to try a more direct approach to day detection by checking the event's date directly. If the event has a DTSTART with a day value, I can determine which day it belongs to—February 1st (day=1) indicates Day 2, while January 31st (day=31) indicates Day 1. This way I can explicitly set the dayNumber based on the actual event data rather than relying on any intermediate state.
The core logic should be straightforward: if the day isn't 31, it must be Day 2. Though I'm realizing this assumes all events fall on just these two dates, which might be a limiting assumption. The original ternary operator approach with DAY1_DATE = 31 was doing exactly this—checking if the day equals 31 to assign dayNumber = 1, otherwise defaulting to 2.
Testing the inverse condition with DAY2_DATE = 1 should be logically equivalent, but if it behaves differently, something's off with how the comparison is being evaluated. I could also write this more explicitly with separate if/elseif branches to check both the 31st and 1st cases, though that ends up being the same logic just more verbose.
Wait—what if event.DTSTART.day is actually a string like "31" instead of a number? The parser uses tonumber() on the substring, so it should convert properly. For the date string "20260131T090000", extracting characters 7-8 gives "31", and tonumber("31") returns 31. Similarly, "20260201T090000" would extract "01", converting to 1.
Maybe the real problem is that the events list has shifted between when dividers were added and when they're being rendered. I've tried storing day information directly with the divider, but that didn't help either. Let me reconsider the row parameter in drawHorizontalDivider—the documentation doesn't clarify whether it's section-relative or absolute, which could be causing the lookup to fail.
Since we're only using section 1 and always passing it explicitly, the row numbers should align correctly. I could add debugging output to see what row value is actually being passed and which day gets detected. Let me modify the draw function to display both the row number and detected day so I can trace where the mismatch is happening.
Actually, the user wants me to think harder about this. Let me reconsider - could getCurrentEvents() be returning a cached list instead of fresh data each time? Or maybe the callback function is a closure that's holding onto stale values from when it was first created?
Looking at the code structure, the callback is defined inside init(), and it calls ScheduleView.getCurrentEvents() which is defined later in the file. When init() executes, getCurrentEvents() should already exist since the entire file loads before init() runs. But wait - let me verify the actual definition order in the file. If getCurrentEvents() is defined after init(), that shouldn't matter for runtime calls, but it's worth double-checking how the data flows through the callback.
The bug manifests as both dividers showing "DAY 1" with different event sets, which means dayNumber stays 1 for both calls. This could happen if event is nil, if event.DTSTART doesn't exist, or if event.DTSTART.day always equals DAY1_DATE (31). I need to trace which of these conditions is actually occurring when the dividers render.
For the second divider positioned above the first Day 2 event, if we're still getting a Day 1 event, then the row parameter passed to the callback might be off by one. When addHorizontalDividerAbove(1, i) is called with i as the Day 2 event index, the callback could be receiving row = i-1, which would pull the last Day 1 event instead. I should test different row offsets—trying events[row], events[row+1], or events[row-1]—to see which one correctly identifies the event type at each divider position.
Rather than relying on the events array indexing, I could maintain a separate data structure to track divider positions and their associated days. This way I control the mapping directly instead of depending on potentially misaligned row indices. I'd create a dividerInfo table keyed by row number, then populate it as dividers are added, ensuring each divider knows which day it belongs to without needing to look up the event at that row. ivider(x, y, width, height, row) local dayNumber = dividerInfo[row] or dividerInfo[row-1] or dividerInfo[row+1] or 1 ... end ```
This approach checks multiple row indices to handle potential off-by-one errors. However, this strategy was attempted before without success since dividerInfo[row] kept returning nil.
A simpler approach would be to explicitly track the dividers. Since there are at most two, I can store them directly as firstDividerDay and secondDividerDay with their corresponding row numbers, then reference these values when drawing rather than relying on the dividerInfo table lookups. Number = secondDividerDay end ... end
The approach feels a bit fragile, but it might handle edge cases where row indices get shifted. Let me reconsider this more carefully though. The gridview manages dividers internally when we call addHorizontalDividerAbove, and then invokes drawHorizontalDivider for rendering. The row parameter should match what we passed in, but there could be some transformation happening that I'm not accounting for. Rather than patching around potential off-by-one errors, I should verify whether Playdate is doing something unexpected with row values, or if I'm misunderstanding how the gridview tracks dividers.
One thought: the gridview might be storing dividers by their visual position on screen rather than their logical row index, especially if scrolling or layout changes affect things. Or the callback might use 0-indexed rows while we're passing 1-indexed values.
Instead of relying on the row parameter to identify which divider is being drawn, I could track dividers by their draw order. If I maintain a counter that increments each time drawHorizontalDivider is called, I can map the first call to the first divider, the second call to the second divider, and so on. Then I'd store which days correspond to each divider position and look them up that way.
The issue is that drawHorizontalDivider might be called multiple times per frame during scrolling, so a simple counter approach could get out of sync. The gridview itself likely has better information about which dividers exist and their actual positions.
A more reliable approach would be to store the row numbers where dividers were added along with their corresponding day numbers, then look up the day during drawing based on the row parameter passed to drawHorizontalDivider. This way we're using the actual row information the gridview provides rather than relying on call order. .gridview:drawHorizontalDivider(x, y, width, height, row) retrieves the stored divider day using the same string key format, then defaults to 1 if not found. I'm realizing the month comparison might actually work since January and February have different month values—January is month 1 and February is month 2. Let me reconsider the constants: DAY1_DATE is set to 31, which represents the day of the month for the first day.
Since Day 1 falls on January 31st (month=1, day=31) and Day 2 falls on February 1st (month=2, day=1), I can simply check the month value to determine which day it is. If the event's month is 2, it's Day 2; otherwise it's Day 1. This approach is more straightforward and avoids potential edge cases. I'll implement this logic and add comprehensive defensive checks and debug logging to trace exactly what's happening with the event data.
Beyond this, I need to handle the different track configurations: when a track contains only Day 1 events, show the Day 1 header if the user has selected Day 1 or Both; when a track has only Day 2 events, show the Day 2 header if Day 2 or Both is selected; and when a track has events from both days, display both headers appropriately.
When the user switches between day selections, the entire view needs to refresh. Additionally, if they select a specific day and the current track has no events for that day, the system should automatically switch to the Main Track instead.
To implement this, I'll need to update the menu callback in main.lua to validate whether the selected category contains events matching the chosen day filter, and fall back to Main Track if there's a mismatch. The drawHorizontalDivider function should check the event's month field rather than the day-of-month to determine which day label to display.
Let me think through this carefully.
The issue is that events[row] might not be returning the right event due to some indexing mismatch. Let me try using the MONTH to determine the day (since January=1 is Day 1, February=2 is Day 2), and also add a fallback approach:
-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2) local DAY1_DATE = 31 local DAY2_DATE = 1
-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2)
local DAY1_DATE = 31
local DAY2_DATE = 1
local DAY1_MONTH = 1 -- January
local DAY2_MONTH = 2 -- February
-- Track divider days: maps row number to day number
local dividerDayMap = {}The file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Now let me update the drawHorizontalDivider to use multiple fallback approaches: 1. Look up from dividerDayMap 2. Look up from event at that row using month 3. Default to 1
-- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
-- Determine day from the event at this row
local events = ScheduleView.getCurrentEvents()
local event = events[row]
local dayNumber = 1
if event and event.DTSTART then
dayNumber = (event.DTSTART.day == DAY1_DATE) and 1 or 2
end
local dayText = "Day " .. dayNumber
gfx.setColor(gfx.kColorBlack)
gfx.fillRect(x, y, width, height)
gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
gfx.setImageDrawMode(gfx.kDrawModeCopy)
end -- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
-- Try multiple approaches to determine the day
local dayNumber = nil
-- Approach 1: Look up from our stored map (try exact and nearby rows)
dayNumber = dividerDayMap[row] or dividerDayMap[row + 1] or dividerDayMap[row - 1]
-- Approach 2: Determine from event data using month (more reliable than day)
if not dayNumber then
local events = ScheduleView.getCurrentEvents()
local event = events[row] or events[row + 1] or events[row - 1]
if event and event.DTSTART and event.DTSTART.month then
dayNumber = (event.DTSTART.month == DAY2_MONTH) and 2 or 1
end
end
-- Fallback
dayNumber = dayNumber or 1
local dayText = "Day " .. dayNumber
gfx.setColor(gfx.kColorBlack)
gfx.fillRect(x, y, width, height)
gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
gfx.setImageDrawMode(gfx.kDrawModeCopy)
endThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
-- Add day dividers for Day 1 and Day 2 headers
-- Always shows a header for the day(s) being displayed
function ScheduleView.updateDayDividers()
ScheduleView.gridview:removeHorizontalDividers()
local events = ScheduleView.getCurrentEvents()
if #events == 0 then return end
local firstEvent = events[1]
if not firstEvent or not firstEvent.DTSTART then return end
-- Always add header for the first event
ScheduleView.gridview:addHorizontalDividerAbove(1, 1)
-- If showing both days, add Day 2 divider where date changes
if State.dayFilter == State.DAY_FILTER_BOTH then
for i = 2, #events do
local prevEvent = events[i - 1]
local currEvent = events[i]
if prevEvent.DTSTART and currEvent.DTSTART then
if prevEvent.DTSTART.day == DAY1_DATE and currEvent.DTSTART.day == DAY2_DATE then
ScheduleView.gridview:addHorizontalDividerAbove(1, i)
break -- Only one transition possible
end
end
end
end
end-- Add day dividers for Day 1 and Day 2 headers
-- Always shows a header for the day(s) being displayed
function ScheduleView.updateDayDividers()
ScheduleView.gridview:removeHorizontalDividers()
dividerDayMap = {} -- Clear the map
local events = ScheduleView.getCurrentEvents()
if #events == 0 then return end
local firstEvent = events[1]
if not firstEvent or not firstEvent.DTSTART then return end
-- Determine the day for the first event using month
local firstDay = (firstEvent.DTSTART.month == DAY2_MONTH) and 2 or 1
-- Store in map with multiple keys to handle any off-by-one issues
dividerDayMap[0] = firstDay
dividerDayMap[1] = firstDay
dividerDayMap[2] = firstDay
ScheduleView.gridview:addHorizontalDividerAbove(1, 1)
-- If showing both days, add Day 2 divider where date changes
if State.dayFilter == State.DAY_FILTER_BOTH then
for i = 2, #events do
local prevEvent = events[i - 1]
local currEvent = events[i]
if prevEvent.DTSTART and currEvent.DTSTART then
-- Use month for more reliable comparison
if prevEvent.DTSTART.month == DAY1_MONTH and currEvent.DTSTART.month == DAY2_MONTH then
-- Store Day 2 with multiple nearby keys
dividerDayMap[i - 1] = 2
dividerDayMap[i] = 2
dividerDayMap[i + 1] = 2
ScheduleView.gridview:addHorizontalDividerAbove(1, i)
break -- Only one transition possible
end
end
end
end
endThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Now let me also update getCurrentEvents to use month for filtering, and update the main.lua to handle switching to Main Track when needed. Let me also update the menu callback to properly reload the view.First, let me read the current main.lua to see the callback:
Now let me update the menu callback in main.lua to handle switching to Main Track if the current category has no events for the selected day:
{
"file_path": "/home/nemo/projects/personal/fosdem-playdate/source/main.lua",
"offset": 30,
"limit": 30
} 30→-- Loading state message
31→local loadingMessage = "Loading..."
32→
33→-- Setup System Menu
34→local function setupSystemMenu()
35→ local menu = playdate.getSystemMenu()
36→
37→ menu:addOptionsMenuItem("Days", {"Both", "Day 1", "Day 2"}, State.dayFilter, function(value)
38→ State.dayFilter = value
39→ Persistence.saveDayFilter(value)
40→ State.ensureValidCategory()
41→ ScheduleView.updateRowCount()
42→ end)
43→
44→ menu:addMenuItem("Devrooms", function()
45→ if State.currentState == State.SCHEDULE_VIEW or State.currentState == State.MAIN_MENU then
46→ State.currentState = State.DEVROOMS_VIEW
47→ DevroomsFilter.show()
48→ playdate.inputHandlers.pop()
49→ playdate.inputHandlers.push(InputHandlers.devroomsHandlers)
50→ end
51→ end)
52→end
53→
54→-- Load and parse the schedule
55→function loadSchedule()
56→ loadingMessage = "Parsing schedule..."
57→
58→ local events, error = parseScheduleFile("schedule.json")
59→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
I need to update the menu callback to: 1. Check if current category has events for the new day selection 2. If not, switch to Main Track 3. Fully reload the viewLet me also check what State.ensureValidCategory does and if we need to enhance it.
menu:addOptionsMenuItem("Days", {"Both", "Day 1", "Day 2"}, State.dayFilter, function(value)
State.dayFilter = value
Persistence.saveDayFilter(value)
State.ensureValidCategory()
ScheduleView.updateRowCount()
end) menu:addOptionsMenuItem("Days", {"Both", "Day 1", "Day 2"}, State.dayFilter, function(value)
State.dayFilter = value
Persistence.saveDayFilter(value)
-- Check if current category has events for the new filter
local currentCategory = State.getCurrentCategory()
if currentCategory and not State.isCategoryVisible(currentCategory) then
-- Current category has no events for this day filter, switch to Main Track
State.setToMainTrack()
else
State.ensureValidCategory()
ScheduleView.updateRowCount()
ScheduleView.scrollToActiveEvent()
end
end)The file /home/nemo/projects/personal/fosdem-playdate/source/main.lua has been updated successfully.
Now let me also update getCurrentEvents to use month-based filtering instead of day-based, to be consistent:
function ScheduleView.getCurrentEvents()
local category = State.getCurrentCategory()
if not category then
return {}
end
local allEvents = EventStore.getEventsForCategory(category)
-- If "Both" is selected, return all events
if State.dayFilter == State.DAY_FILTER_BOTH then
return allEvents
end
-- Filter events to only show selected day's events
local filterDate = (State.dayFilter == State.DAY_FILTER_DAY1) and DAY1_DATE or DAY2_DATE
local filteredEvents = {}
for _, event in ipairs(allEvents) do
if event.DTSTART and event.DTSTART.day == filterDate then
table.insert(filteredEvents, event)
end
end
return filteredEvents
endfunction ScheduleView.getCurrentEvents()
local category = State.getCurrentCategory()
if not category then
return {}
end
local allEvents = EventStore.getEventsForCategory(category)
-- If "Both" is selected, return all events
if State.dayFilter == State.DAY_FILTER_BOTH then
return allEvents
end
-- Filter events to only show selected day's events (use month for reliable filtering)
local filterMonth = (State.dayFilter == State.DAY_FILTER_DAY1) and DAY1_MONTH or DAY2_MONTH
local filteredEvents = {}
for _, event in ipairs(allEvents) do
if event.DTSTART and event.DTSTART.month == filterMonth then
table.insert(filteredEvents, event)
end
end
return filteredEvents
endThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Now I need to also update State.isCategoryVisible to use month-based checking for consistency. Let me check what that function looks like and if it needs updating:
1→-- Application state management
2→
3→-- FOSDEM 2026 dates
4→local DAY1_MONTH, DAY1_DATE = 1, 31 -- Jan 31
5→local DAY2_MONTH, DAY2_DATE = 2, 1 -- Feb 1
6→
7→State = {
8→ -- Application states
9→ LOADING = "loading",
10→ TIMEZONE_ERROR = "timezone_error",
11→ MAIN_MENU = "main_menu",
12→ SCHEDULE_VIEW = "schedule_view",
13→ QR_VIEW = "qr_view",
14→ DEVROOMS_VIEW = "devrooms_view",
15→
16→ -- Day filter options
17→ DAY_FILTER_BOTH = "Both",
18→ DAY_FILTER_DAY1 = "Day 1",
19→ DAY_FILTER_DAY2 = "Day 2",
20→
21→ -- Current state
22→ currentState = "main_menu",
23→ currentCategoryIndex = 1,
24→ visibleCategoryIndex = 1,
25→ hiddenCategories = {},
26→ dayFilter = "Both", -- "Both", "Day 1", or "Day 2"
27→}
28→
29→function State.init()
30→ State.currentState = State.SCHEDULE_VIEW
31→ State.currentCategoryIndex = 1
32→ State.visibleCategoryIndex = 1
33→ State.hiddenCategories = Persistence.loadHiddenCategories()
34→ State.dayFilter = Persistence.loadDayFilter()
35→end
36→
37→-- Get current day (1 or 2), defaults to 1 if not during FOSDEM
38→function State.getToday()
39→ local now = playdate.getTime()
40→ if now.month == DAY1_MONTH and now.day == DAY1_DATE then
41→ return 1
42→ elseif now.month == DAY2_MONTH and now.day == DAY2_DATE then
43→ return 2
44→ else
45→ -- Not during FOSDEM, default to Day 1 for testing
46→ return 1
47→ end
48→end
49→
50→function State.getCurrentCategory()
51→ return EventStore.getCategoryByIndex(State.currentCategoryIndex)
52→end
53→
54→-- Check if category should be visible based on hidden and day filters
55→function State.isCategoryVisible(category)
56→ if not category then return false end
57→ if State.hiddenCategories[category] then return false end
58→ if State.dayFilter ~= State.DAY_FILTER_BOTH then
59→ -- Only show categories with events on the selected day
60→ local day = (State.dayFilter == State.DAY_FILTER_DAY1) and 1 or 2
61→ if not EventStore.categoryHasEventsOnDay(category, day) then
62→ return false
63→ end
64→ end
65→ return true
66→end
67→
68→-- Get list of visible categories
69→function State.getVisibleCategories()
70→ local visible = {}
71→ for i = 1, EventStore.getCategoryCount() do
72→ local category = EventStore.getCategoryByIndex(i)
73→ if State.isCategoryVisible(category) then
74→ table.insert(visible, { index = i, name = category })
75→ end
76→ end
77→ return visible
78→end
79→
80→function State.getVisibleCategoryCount()
81→ local count = 0
82→ for i = 1, EventStore.getCategoryCount() do
83→ local category = EventStore.getCategoryByIndex(i)
84→ if State.isCategoryVisible(category) then
85→ count = count + 1
86→ end
87→ end
88→ return count
89→end
90→
91→-- Find the visible index for the current category
92→function State.findVisibleIndex()
93→ local visibleCategories = State.getVisibleCategories()
94→ local currentCategory = State.getCurrentCategory()
95→
96→ for i, cat in ipairs(visibleCategories) do
97→ if cat.name == currentCategory then
98→ return i
99→ end
100→ end
101→ return 1
102→end
103→
104→-- Set category by visible index (skips hidden categories)
105→function State.setVisibleCategory(visibleIndex)
106→ local visibleCategories = State.getVisibleCategories()
107→
108→ if #visibleCategories == 0 then
109→ return
110→ end
111→
112→ -- Wrap around
113→ if visibleIndex < 1 then
114→ visibleIndex = #visibleCategories
115→ elseif visibleIndex > #visibleCategories then
116→ visibleIndex = 1
117→ end
118→
119→ State.visibleCategoryIndex = visibleIndex
120→ State.currentCategoryIndex = visibleCategories[visibleIndex].index
121→
122→ ScheduleView.updateRowCount()
123→ ScheduleView.scrollToActiveEvent()
124→end
125→
126→function State.nextCategory()
127→ local currentVisibleIndex = State.findVisibleIndex()
128→ State.setVisibleCategory(currentVisibleIndex + 1)
129→end
130→
131→function State.previousCategory()
132→ local currentVisibleIndex = State.findVisibleIndex()
133→ State.setVisibleCategory(currentVisibleIndex - 1)
134→end
135→
136→-- Set to Main Track category
137→function State.setToMainTrack()
138→ local mainTrackIndex = EventStore.getCategoryIndex(Config.MAIN_TRACK)
139→ if mainTrackIndex then
140→ State.currentCategoryIndex = mainTrackIndex
141→ State.visibleCategoryIndex = State.findVisibleIndex()
142→ ScheduleView.updateRowCount()
143→ ScheduleView.scrollToActiveEvent()
144→ end
145→end
146→
147→-- Ensure current category is still visible after filter changes
148→function State.ensureValidCategory()
149→ local currentCategory = State.getCurrentCategory()
150→ if currentCategory and State.hiddenCategories[currentCategory] then
151→ -- Current category was hidden, switch to first visible
152→ State.setVisibleCategory(1)
153→ else
154→ -- Update visible index
155→ State.visibleCategoryIndex = State.findVisibleIndex()
156→ end
157→end
158→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
I see that State.isCategoryVisible uses EventStore.categoryHasEventsOnDay(category, day). I need to check if this function uses month or day-of-month. Let me look at the EventStore:
{
"file_path": "/home/nemo/projects/personal/fosdem-playdate/source/data/eventStore.lua"
} 1→-- Event store for organizing and accessing parsed events
2→
3→-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2)
4→local DAY1_DATE = 31
5→local DAY2_DATE = 1
6→
7→EventStore = {
8→ allEvents = {},
9→ eventsByCategory = {},
10→ categoryNames = {},
11→ categoryDays = {}, -- category -> { day1 = bool, day2 = bool }
12→}
13→
14→function EventStore.init(events)
15→ EventStore.allEvents = events or {}
16→ EventStore.eventsByCategory = {}
17→ EventStore.categoryNames = {}
18→ EventStore.categoryDays = {}
19→
20→ local categorySet = {}
21→
22→ -- Build category map
23→ for _, event in ipairs(EventStore.allEvents) do
24→ local category = event.CATEGORY
25→ if category and #category > 0 then
26→ if not categorySet[category] then
27→ categorySet[category] = true
28→ table.insert(EventStore.categoryNames, category)
29→ EventStore.categoryDays[category] = { day1 = false, day2 = false }
30→ end
31→ if not EventStore.eventsByCategory[category] then
32→ EventStore.eventsByCategory[category] = {}
33→ end
34→ table.insert(EventStore.eventsByCategory[category], event)
35→
36→ -- Track which days this category has events
37→ if event.DTSTART then
38→ if event.DTSTART.day == DAY1_DATE then
39→ EventStore.categoryDays[category].day1 = true
40→ elseif event.DTSTART.day == DAY2_DATE then
41→ EventStore.categoryDays[category].day2 = true
42→ end
43→ end
44→ end
45→ end
46→
47→ -- Sort category names alphabetically
48→ table.sort(EventStore.categoryNames)
49→
50→ -- Sort events within each category by start time
51→ for _, catEvents in pairs(EventStore.eventsByCategory) do
52→ table.sort(catEvents, function(a, b)
53→ return (a.DTSTART_epoch or 0) < (b.DTSTART_epoch or 0)
54→ end)
55→ end
56→
57→ print("EventStore: " .. #EventStore.allEvents .. " events, " .. #EventStore.categoryNames .. " categories")
58→end
59→
60→-- Check if category has events on the given day (1 or 2)
61→function EventStore.categoryHasEventsOnDay(category, day)
62→ local days = EventStore.categoryDays[category]
63→ if not days then return false end
64→ if day == 1 then return days.day1 end
65→ if day == 2 then return days.day2 end
66→ return false
67→end
68→
69→function EventStore.getEventsForCategory(category)
70→ return EventStore.eventsByCategory[category] or {}
71→end
72→
73→function EventStore.getCategoryIndex(categoryName)
74→ for i, name in ipairs(EventStore.categoryNames) do
75→ if name == categoryName then
76→ return i
77→ end
78→ end
79→ return 1
80→end
81→
82→function EventStore.getCategoryByIndex(index)
83→ return EventStore.categoryNames[index]
84→end
85→
86→function EventStore.getCategoryCount()
87→ return #EventStore.categoryNames
88→end
89→
90→-- Find the first event in a category where DTEND > current time
91→function EventStore.findFirstActiveEventIndex(category)
92→ local events = EventStore.getEventsForCategory(category)
93→ local currentEpoch = getCurrentEpoch()
94→
95→ for i, event in ipairs(events) do
96→ if event.DTEND_epoch and event.DTEND_epoch > currentEpoch then
97→ return i
98→ end
99→ end
100→ return 1 -- Default to first event if all have ended
101→end
102→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
I see! The EventStore uses day-of-month (DAY1_DATE=31, DAY2_DATE=1) to track which days a category has events. This is actually OK because the data is stored at init time and uses the same logic consistently.
However, I should also update this to use month for consistency. But actually, looking at the code, using day-of-month should work as long as it's consistent. The issue was in the comparison in scheduleView.lua.
Actually wait - the EventStore is using day-of-month (31 vs 1) which SHOULD work. The issue is that all events in the JSON have the day field as a number from tonumber().
Let me think about this... If an event is on January 31: - event.DTSTART.day = 31 - event.DTSTART.month = 1
If an event is on February 1: - event.DTSTART.day = 1 - event.DTSTART.month = 2
So checking day == 31 should correctly identify Day 1, and day == 1 should correctly identify Day 2.
But wait - what if there are events on other dates? Like January 1st (day=1, month=1)? That would be incorrectly identified as Day 2!
Actually, FOSDEM events should only be on January 31 and February 1. But to be safe, using month is more reliable since: - January (month=1) -> Day 1 - February (month=2) -> Day 2
Let me update EventStore to use month as well:
-- Event store for organizing and accessing parsed events -- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2) local DAY1_DATE = 31 local DAY2_DATE = 1
-- Event store for organizing and accessing parsed events -- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2) local DAY1_MONTH = 1 -- January local DAY2_MONTH = 2 -- February
The file /home/nemo/projects/personal/fosdem-playdate/source/data/eventStore.lua has been updated successfully.
-- Track which days this category has events
if event.DTSTART then
if event.DTSTART.day == DAY1_DATE then
EventStore.categoryDays[category].day1 = true
elseif event.DTSTART.day == DAY2_DATE then
EventStore.categoryDays[category].day2 = true
end
end -- Track which days this category has events (use month for reliable detection)
if event.DTSTART and event.DTSTART.month then
if event.DTSTART.month == DAY1_MONTH then
EventStore.categoryDays[category].day1 = true
elseif event.DTSTART.month == DAY2_MONTH then
EventStore.categoryDays[category].day2 = true
end
endThe file /home/nemo/projects/personal/fosdem-playdate/source/data/eventStore.lua has been updated successfully.
Now I've updated all the day detection logic to use month instead of day-of-month. This is more reliable since:- January = Day 1 (month == 1)- February = Day 2 (month == 2)
This avoids any potential issues with day-of-month comparisons. Let me verify the current state of the scheduleView to make sure everything is consistent:
{
"file_path": "/home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua"
} 1→-- Main schedule view using gridview
2→
3→ScheduleView = {
4→ gridview = nil,
5→}
6→
7→local gfx <const> = playdate.graphics
8→
9→-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2)
10→local DAY1_DATE = 31
11→local DAY2_DATE = 1
12→local DAY1_MONTH = 1 -- January
13→local DAY2_MONTH = 2 -- February
14→
15→-- Track divider days: maps row number to day number
16→local dividerDayMap = {}
17→
18→
19→function ScheduleView.init()
20→ -- Create gridview with cell width 0 (full width) and appropriate height
21→ ScheduleView.gridview = playdate.ui.gridview.new(0, Config.CELL_HEIGHT)
22→ ScheduleView.gridview:setContentInset(0, 0, 0, 0)
23→ ScheduleView.gridview:setHorizontalDividerHeight(Config.CELL_HEIGHT)
24→
25→ -- Override drawCell
26→ function ScheduleView.gridview:drawCell(section, row, column, selected, x, y, width, height)
27→ local events = ScheduleView.getCurrentEvents()
28→ local event = events[row]
29→ if not event then return end
30→
31→ local timeStr = formatTimeForDisplay(event.DTSTART)
32→ local summary = event.SUMMARY or "Untitled"
33→ local displayText = " " .. timeStr .. " " .. summary
34→
35→ if selected then
36→ gfx.setColor(gfx.kColorBlack)
37→ gfx.fillRect(x, y, width, height)
38→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
39→ else
40→ gfx.setColor(gfx.kColorWhite)
41→ gfx.setImageDrawMode(gfx.kDrawModeFillBlack)
42→ end
43→
44→ gfx.drawTextInRect(displayText, x, y, width, height, nil, "...", kTextAlignment.left)
45→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
46→ end
47→
48→ -- Override drawHorizontalDivider for Day 1/Day 2 separator
49→ function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
50→ -- Try multiple approaches to determine the day
51→ local dayNumber = nil
52→
53→ -- Approach 1: Look up from our stored map (try exact and nearby rows)
54→ dayNumber = dividerDayMap[row] or dividerDayMap[row + 1] or dividerDayMap[row - 1]
55→
56→ -- Approach 2: Determine from event data using month (more reliable than day)
57→ if not dayNumber then
58→ local events = ScheduleView.getCurrentEvents()
59→ local event = events[row] or events[row + 1] or events[row - 1]
60→ if event and event.DTSTART and event.DTSTART.month then
61→ dayNumber = (event.DTSTART.month == DAY2_MONTH) and 2 or 1
62→ end
63→ end
64→
65→ -- Fallback
66→ dayNumber = dayNumber or 1
67→
68→ local dayText = "Day " .. dayNumber
69→ gfx.setColor(gfx.kColorBlack)
70→ gfx.fillRect(x, y, width, height)
71→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
72→ gfx.drawTextAligned(dayText, x + width / 2, y + 4, kTextAlignment.center)
73→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
74→ end
75→end
76→
77→-- Add day dividers for Day 1 and Day 2 headers
78→-- Always shows a header for the day(s) being displayed
79→function ScheduleView.updateDayDividers()
80→ ScheduleView.gridview:removeHorizontalDividers()
81→ dividerDayMap = {} -- Clear the map
82→ local events = ScheduleView.getCurrentEvents()
83→
84→ if #events == 0 then return end
85→
86→ local firstEvent = events[1]
87→ if not firstEvent or not firstEvent.DTSTART then return end
88→
89→ -- Determine the day for the first event using month
90→ local firstDay = (firstEvent.DTSTART.month == DAY2_MONTH) and 2 or 1
91→
92→ -- Store in map with multiple keys to handle any off-by-one issues
93→ dividerDayMap[0] = firstDay
94→ dividerDayMap[1] = firstDay
95→ dividerDayMap[2] = firstDay
96→ ScheduleView.gridview:addHorizontalDividerAbove(1, 1)
97→
98→ -- If showing both days, add Day 2 divider where date changes
99→ if State.dayFilter == State.DAY_FILTER_BOTH then
100→ for i = 2, #events do
101→ local prevEvent = events[i - 1]
102→ local currEvent = events[i]
103→ if prevEvent.DTSTART and currEvent.DTSTART then
104→ -- Use month for more reliable comparison
105→ if prevEvent.DTSTART.month == DAY1_MONTH and currEvent.DTSTART.month == DAY2_MONTH then
106→ -- Store Day 2 with multiple nearby keys
107→ dividerDayMap[i - 1] = 2
108→ dividerDayMap[i] = 2
109→ dividerDayMap[i + 1] = 2
110→ ScheduleView.gridview:addHorizontalDividerAbove(1, i)
111→ break -- Only one transition possible
112→ end
113→ end
114→ end
115→ end
116→end
117→
118→function ScheduleView.getCurrentEvents()
119→ local category = State.getCurrentCategory()
120→ if not category then
121→ return {}
122→ end
123→
124→ local allEvents = EventStore.getEventsForCategory(category)
125→
126→ -- If "Both" is selected, return all events
127→ if State.dayFilter == State.DAY_FILTER_BOTH then
128→ return allEvents
129→ end
130→
131→ -- Filter events to only show selected day's events (use month for reliable filtering)
132→ local filterMonth = (State.dayFilter == State.DAY_FILTER_DAY1) and DAY1_MONTH or DAY2_MONTH
133→ local filteredEvents = {}
134→
135→ for _, event in ipairs(allEvents) do
136→ if event.DTSTART and event.DTSTART.month == filterMonth then
137→ table.insert(filteredEvents, event)
138→ end
139→ end
140→
141→ return filteredEvents
142→end
143→
144→function ScheduleView.updateRowCount()
145→ local events = ScheduleView.getCurrentEvents()
146→ ScheduleView.gridview:setNumberOfRows(#events)
147→ ScheduleView.updateDayDividers()
148→end
149→
150→function ScheduleView.scrollToActiveEvent()
151→ local category = State.getCurrentCategory()
152→ if category then
153→ local activeIndex = EventStore.findFirstActiveEventIndex(category)
154→ ScheduleView.gridview:setSelectedRow(activeIndex)
155→ ScheduleView.gridview:scrollToRow(activeIndex)
156→ end
157→end
158→
159→function ScheduleView.getSelectedEvent()
160→ local events = ScheduleView.getCurrentEvents()
161→ local row = ScheduleView.gridview:getSelectedRow()
162→ return events[row]
163→end
164→
165→function ScheduleView.draw()
166→ -- Draw header (black background, white text)
167→ gfx.setColor(gfx.kColorBlack)
168→ gfx.fillRect(0, 0, Config.SCREEN_WIDTH, Config.HEADER_HEIGHT)
169→ gfx.setImageDrawMode(gfx.kDrawModeFillWhite)
170→
171→ local category = State.getCurrentCategory() or "No Category"
172→ local headerText = category
173→
174→ -- Left-aligned header, wrap to two lines if needed
175→ gfx.drawTextInRect(headerText, 8, 2, Config.SCREEN_WIDTH - 16, Config.HEADER_HEIGHT - 4, nil, "...", kTextAlignment.left)
176→
177→ -- Reset draw mode
178→ gfx.setImageDrawMode(gfx.kDrawModeCopy)
179→
180→ -- Draw gridview (no sub-header anymore)
181→ local gridY = Config.HEADER_HEIGHT
182→ local gridHeight = Config.SCREEN_HEIGHT - gridY
183→ ScheduleView.gridview:drawInRect(0, gridY, Config.SCREEN_WIDTH, gridHeight)
184→end
185→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
The code looks good. I've:
dividerDayMap with multiple nearby keys to handle off-by-oneFallback to 1
Updated EventStore to use month for tracking category days
This should fix the bug. Let me also clean up the unused DAY1_DATE and DAY2_DATE constants since we're now using months:
-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2) local DAY1_DATE = 31 local DAY2_DATE = 1 local DAY1_MONTH = 1 -- January local DAY2_MONTH = 2 -- February
-- Day constants (FOSDEM 2026: Jan 31 = Day 1, Feb 1 = Day 2) local DAY1_MONTH = 1 -- January local DAY2_MONTH = 2 -- February
The file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Good. Now let me summarize the changes:
dividerDayMap to store day numbers for each divider rowIn drawHorizontalDivider, try multiple approaches: stored map, then event lookup, then fallback
eventStore.lua:
Changed from using day-of-month to month for tracking which days a category has events
main.lua:
All day detection now uses month (January=1=Day1, February=2=Day2) which is more reliable than day-of-month (31 vs 1).
Done! Here's a summary of the fixes:
Key fix: Changed all day detection from day-of-month (31/1) to month (January=1, February=2). This is more reliable.
Changes made:
event.DTSTART.month instead of event.DTSTART.day for all day detectiondividerDayMap with multiple nearby row keys (i-1, i, i+1) to handle any Playdate row indexing quirksIn drawHorizontalDivider: try map lookup first, then event lookup, then fallback
eventStore.lua:
Use month to track which days each category has events
main.lua:
Try it now - the day headers should correctly show "Day 1" for January events and "Day 2" for February events.
Update error: ui/scheduleView.lua:52: attempt to perform arithmetic on a nil value (local 'row')
stack traceback:
ui/scheduleView.lua:52: in method 'drawHorizontalDivider'
CoreLibs/ui/gridview.lua:479: in method 'drawInRect'
ui/scheduleView.lua:181: in field 'draw'
main.lua:148: in function
The error is on line 52, which is trying to do arithmetic on row when it's nil. Let me look at the current line 52:
dayNumber = dividerDayMap[row] or dividerDayMap[row + 1] or dividerDayMap[row - 1]
If row is nil, then row + 1 would fail. I need to guard against row being nil.
-- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
-- Try multiple approaches to determine the day
local dayNumber = nil
-- Approach 1: Look up from our stored map (try exact and nearby rows)
dayNumber = dividerDayMap[row] or dividerDayMap[row + 1] or dividerDayMap[row - 1]
-- Approach 2: Determine from event data using month (more reliable than day)
if not dayNumber then
local events = ScheduleView.getCurrentEvents()
local event = events[row] or events[row + 1] or events[row - 1]
if event and event.DTSTART and event.DTSTART.month then
dayNumber = (event.DTSTART.month == DAY2_MONTH) and 2 or 1
end
end
-- Fallback
dayNumber = dayNumber or 1
local dayText = "Day " .. dayNumber -- Override drawHorizontalDivider for Day 1/Day 2 separator
function ScheduleView.gridview:drawHorizontalDivider(x, y, width, height, row)
-- Try multiple approaches to determine the day
local dayNumber = nil
row = row or 1 -- Default row to 1 if nil
-- Approach 1: Look up from our stored map (try exact and nearby rows)
dayNumber = dividerDayMap[row] or dividerDayMap[row + 1] or dividerDayMap[row - 1]
-- Approach 2: Determine from event data using month (more reliable than day)
if not dayNumber then
local events = ScheduleView.getCurrentEvents()
local event = events[row] or events[row + 1] or events[row - 1]
if event and event.DTSTART and event.DTSTART.month then
dayNumber = (event.DTSTART.month == DAY2_MONTH) and 2 or 1
end
end
-- Fallback
dayNumber = dayNumber or 1
local dayText = "Day " .. dayNumberThe file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
I added row = row or 1 to default to 1 if row is nil. This should fix the arithmetic error. The fact that row is nil is interesting - it suggests Playdate might not always pass the row parameter. This would explain why our previous approaches weren't working correctly.