Claude Code transcript - page 5/6

User

remove the qr code generation from lua, and switch to readImage

Assistant
Thinking

The user wants me to remove the QR code generation from the Lua code and use readImage instead. Looking at the qrOverlay.lua file, I already updated it to use gfx.image.new() to load the pre-generated QR codes. But I should also remove the import of CoreLibs/qrcode from main.lua since we're no longer generating QR codes at runtime.

Let me check the current state of qrOverlay.lua and make sure it's using the right approach, then remove the qrcode import.

Assistant
⚙ Read
{
  "file_path": "/home/nemo/projects/personal/fosdem-playdate/source/ui/qrOverlay.lua"
}
Tool reply
     1→-- QR code overlay for displaying event URLs
     2→
     3→QROverlay = {
     4→    visible = false,
     5→    qrImage = nil,
     6→    currentEventId = nil,
     7→}
     8→
     9→local gfx <const> = playdate.graphics
    10→
    11→function QROverlay.show(eventId)
    12→    if not eventId or #eventId == 0 then
    13→        print("No event ID to display")
    14→        return
    15→    end
    16→
    17→    QROverlay.visible = true
    18→    QROverlay.qrImage = nil
    19→    QROverlay.currentEventId = eventId
    20→
    21→    -- Load pre-generated QR code image
    22→    local qrPath = "qr/" .. eventId
    23→    QROverlay.qrImage = gfx.image.new(qrPath)
    24→
    25→    if not QROverlay.qrImage then
    26→        print("Could not load QR code: " .. qrPath)
    27→    end
    28→end
    29→
    30→function QROverlay.hide()
    31→    QROverlay.visible = false
    32→    QROverlay.qrImage = nil
    33→    QROverlay.currentEventId = nil
    34→end
    35→
    36→function QROverlay.isVisible()
    37→    return QROverlay.visible
    38→end
    39→
    40→function QROverlay.draw()
    41→    if not QROverlay.visible then return end
    42→
    43→    -- Draw semi-transparent overlay effect by drawing white background
    44→    gfx.setColor(gfx.kColorWhite)
    45→    gfx.fillRect(40, 20, 320, 200)
    46→
    47→    -- Draw border
    48→    gfx.setColor(gfx.kColorBlack)
    49→    gfx.setLineWidth(2)
    50→    gfx.drawRect(40, 20, 320, 200)
    51→    gfx.setLineWidth(1)
    52→
    53→    if QROverlay.qrImage then
    54→        -- Draw QR code centered
    55→        QROverlay.qrImage:drawCentered(200, 110)
    56→    else
    57→        gfx.drawTextAligned("QR code not found", 200, 110, kTextAlignment.center)
    58→    end
    59→
    60→    -- Draw dismiss instruction
    61→    gfx.drawTextAligned("Press B to close", 200, 200, kTextAlignment.center)
    62→end
    63→

<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>
Assistant
Thinking

The qrOverlay.lua is already using gfx.image.new() to load the pre-generated QR code. Now I need to remove the CoreLibs/qrcode import from main.lua since we're no longer using the runtime QR generation.

Assistant

The qrOverlay.lua is already using gfx.image.new(). Let me remove the qrcode import from main.lua:

Assistant
✏️ Edit main.lua
/home/nemo/projects/personal/fosdem-playdate/source/main.lua
−
import "CoreLibs/nineslice"
import "CoreLibs/qrcode"
+
import "CoreLibs/nineslice"
Tool reply
The file /home/nemo/projects/personal/fosdem-playdate/source/main.lua has been updated successfully.
Assistant
Thinking

Done. I've: 1. Removed the CoreLibs/qrcode import from main.lua 2. The qrOverlay.lua already uses gfx.image.new() to load pre-generated QR codes from "qr/EVENT_ID" path

The user has already modified the generate-qr.sh script to remove the smartquotes fixing section and adjusted the qrencode parameters (changed -s 3 to -s 2 and -l M to -l L).

Assistant

Done. Removed CoreLibs/qrcode import. The QR overlay now uses gfx.image.new("qr/" .. eventId) to load pre-generated images.

User

Change the schedule title to left-aligned. No locatio in title, but put it in the QR code popup, where we now show 3 things: Summary, Location, and QR code. Keep the QR code on the right side of the popup.

Assistant
Thinking

The user wants to: 1. Change the schedule title (category header) to left-aligned 2. Remove location from the sub-header 3. In the QR popup, show: Summary, Location, and QR code (with QR code on the right side)

Let me update both scheduleView.lua and qrOverlay.lua.

Assistant
✏️ Edit scheduleView.lua
/home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua
−
function ScheduleView.draw()
    -- Draw header (black background, white text)
    gfx.setColor(gfx.kColorBlack)
    gfx.fillRect(0, 0, Config.SCREEN_WIDTH, Config.HEADER_HEIGHT)
    gfx.setImageDrawMode(gfx.kDrawModeFillWhite)

    local category = State.getCurrentCategory() or "No Category"
    local headerText = "< " .. category .. " >"

    -- Check if header text is too long and wrap to two lines
    local textWidth = gfx.getTextSize(headerText)
    if textWidth > Config.SCREEN_WIDTH - 20 then
        -- Draw on two lines
        gfx.drawTextInRect(headerText, 10, 2, Config.SCREEN_WIDTH - 20, Config.HEADER_HEIGHT - 4, nil, nil, kTextAlignment.center)
    else
        -- Single line centered
        gfx.drawTextAligned(headerText, 200, 8, kTextAlignment.center)
    end

    -- Draw sub-header with location on the right
    gfx.setImageDrawMode(gfx.kDrawModeCopy)
    gfx.setColor(gfx.kColorWhite)
    gfx.fillRect(0, Config.HEADER_HEIGHT, Config.SCREEN_WIDTH, Config.SUB_HEADER_HEIGHT)
    gfx.setColor(gfx.kColorBlack)

    local selectedEvent = ScheduleView.getSelectedEvent()
    if selectedEvent then
        local location = selectedEvent.LOCATION or "Unknown location"
        gfx.drawTextInRect(
            location,
            4,
            Config.HEADER_HEIGHT + 2,
            Config.SCREEN_WIDTH - 8,
            Config.SUB_HEADER_HEIGHT - 4,
            nil,
            "...",
            kTextAlignment.right
        )
    end

    -- Draw separator line
    gfx.drawLine(0, Config.HEADER_HEIGHT + Config.SUB_HEADER_HEIGHT - 1, Config.SCREEN_WIDTH, Config.HEADER_HEIGHT + Config.SUB_HEADER_HEIGHT - 1)

    -- Draw gridview
    local gridY = Config.HEADER_HEIGHT + Config.SUB_HEADER_HEIGHT
    local gridHeight = Config.SCREEN_HEIGHT - gridY
    ScheduleView.gridview:drawInRect(0, gridY, Config.SCREEN_WIDTH, gridHeight)
end
+
function ScheduleView.draw()
    -- Draw header (black background, white text)
    gfx.setColor(gfx.kColorBlack)
    gfx.fillRect(0, 0, Config.SCREEN_WIDTH, Config.HEADER_HEIGHT)
    gfx.setImageDrawMode(gfx.kDrawModeFillWhite)

    local category = State.getCurrentCategory() or "No Category"
    local headerText = "< " .. category .. " >"

    -- Left-aligned header, wrap to two lines if needed
    gfx.drawTextInRect(headerText, 8, 2, Config.SCREEN_WIDTH - 16, Config.HEADER_HEIGHT - 4, nil, "...", kTextAlignment.left)

    -- Reset draw mode
    gfx.setImageDrawMode(gfx.kDrawModeCopy)

    -- Draw gridview (no sub-header anymore)
    local gridY = Config.HEADER_HEIGHT
    local gridHeight = Config.SCREEN_HEIGHT - gridY
    ScheduleView.gridview:drawInRect(0, gridY, Config.SCREEN_WIDTH, gridHeight)
end
Tool reply
The file /home/nemo/projects/personal/fosdem-playdate/source/ui/scheduleView.lua has been updated successfully.
Assistant
Thinking

Now I need to update the QR overlay to show Summary, Location, and QR code (with QR on the right). I also need to pass the event object to the QR overlay instead of just the event ID, so we have access to the summary and location.

Assistant
✏️ Edit qrOverlay.lua
/home/nemo/projects/personal/fosdem-playdate/source/ui/qrOverlay.lua
−
-- QR code overlay for displaying event URLs

QROverlay = {
    visible = false,
    qrImage = nil,
    currentEventId = nil,
}

local gfx <const> = playdate.graphics

function QROverlay.show(eventId)
    if not eventId or #eventId == 0 then
        print("No event ID to display")
        return
    end

    QROverlay.visible = true
    QROverlay.qrImage = nil
    QROverlay.currentEventId = eventId

    -- Load pre-generated QR code image
    local qrPath = "qr/" .. eventId
    QROverlay.qrImage = gfx.image.new(qrPath)

    if not QROverlay.qrImage then
        print("Could not load QR code: " .. qrPath)
    end
end

function QROverlay.hide()
    QROverlay.visible = false
    QROverlay.qrImage = nil
    QROverlay.currentEventId = nil
end

function QROverlay.isVisible()
    return QROverlay.visible
end

function QROverlay.draw()
    if not QROverlay.visible then return end

    -- Draw semi-transparent overlay effect by drawing white background
    gfx.setColor(gfx.kColorWhite)
    gfx.fillRect(40, 20, 320, 200)

    -- Draw border
    gfx.setColor(gfx.kColorBlack)
    gfx.setLineWidth(2)
    gfx.drawRect(40, 20, 320, 200)
    gfx.setLineWidth(1)

    if QROverlay.qrImage then
        -- Draw QR code centered
        QROverlay.qrImage:drawCentered(200, 110)
    else
        gfx.drawTextAligned("QR code not found", 200, 110, kTextAlignment.center)
    end

    -- Draw dismiss instruction
    gfx.drawTextAligned("Press B to close", 200, 200, kTextAlignment.center)
end
+
-- QR code overlay for displaying event details and QR code

QROverlay = {
    visible = false,
    qrImage = nil,
    currentEvent = nil,
}

local gfx <const> = playdate.graphics

function QROverlay.show(event)
    if not event or not event.EVENT_ID then
        print("No event to display")
        return
    end

    QROverlay.visible = true
    QROverlay.qrImage = nil
    QROverlay.currentEvent = event

    -- Load pre-generated QR code image
    local qrPath = "qr/" .. event.EVENT_ID
    QROverlay.qrImage = gfx.image.new(qrPath)

    if not QROverlay.qrImage then
        print("Could not load QR code: " .. qrPath)
    end
end

function QROverlay.hide()
    QROverlay.visible = false
    QROverlay.qrImage = nil
    QROverlay.currentEvent = nil
end

function QROverlay.isVisible()
    return QROverlay.visible
end

function QROverlay.draw()
    if not QROverlay.visible then return end

    local event = QROverlay.currentEvent

    -- Draw white background
    gfx.setColor(gfx.kColorWhite)
    gfx.fillRect(10, 20, 380, 200)

    -- Draw border
    gfx.setColor(gfx.kColorBlack)
    gfx.setLineWidth(2)
    gfx.drawRect(10, 20, 380, 200)
    gfx.setLineWidth(1)

    -- Left side: Summary and Location
    local textX = 20
    local textY = 30
    local textWidth = 220

    -- Summary (bold)
    if event and event.SUMMARY then
        gfx.drawTextInRect("*" .. event.SUMMARY .. "*", textX, textY, textWidth, 80, nil, "...", kTextAlignment.left)
    end

    -- Location
    if event and event.LOCATION then
        gfx.drawTextInRect(event.LOCATION, textX, textY + 90, textWidth, 40, nil, "...", kTextAlignment.left)
    end

    -- Right side: QR code
    local qrX = 290
    local qrY = 70
    if QROverlay.qrImage then
        QROverlay.qrImage:drawCentered(qrX, qrY + 50)
    else
        gfx.drawTextAligned("No QR", qrX, qrY + 50, kTextAlignment.center)
    end

    -- Draw dismiss instruction at bottom
    gfx.drawTextAligned("Press B to close", 200, 200, kTextAlignment.center)
end
Tool reply
The file /home/nemo/projects/personal/fosdem-playdate/source/ui/qrOverlay.lua has been updated successfully.
Assistant
Thinking

Now I need to update the input handler to pass the entire event object instead of just the event ID.

Assistant

Now update the input handler to pass the full event object:

Assistant
✏️ Edit inputHandlers.lua
/home/nemo/projects/personal/fosdem-playdate/source/input/inputHandlers.lua
−
    AButtonDown = function()
        local event = ScheduleView.getSelectedEvent()
        if event and event.EVENT_ID and #event.EVENT_ID > 0 then
            State.currentState = State.QR_VIEW
            QROverlay.show(event.EVENT_ID)
            playdate.inputHandlers.push(InputHandlers.qrHandlers)
        end
    end,
+
    AButtonDown = function()
        local event = ScheduleView.getSelectedEvent()
        if event and event.EVENT_ID then
            State.currentState = State.QR_VIEW
            QROverlay.show(event)
            playdate.inputHandlers.push(InputHandlers.qrHandlers)
        end
    end,
Tool reply
The file /home/nemo/projects/personal/fosdem-playdate/source/input/inputHandlers.lua has been updated successfully.
Assistant
Thinking

I should also update the config to remove SUB_HEADER_HEIGHT since we're no longer using it, or just leave it. Let me leave it for now since it doesn't hurt anything.

Actually, I should also check if the scheduleView uses SUB_HEADER_HEIGHT anywhere else that might cause issues. Let me verify the changes are complete.

Assistant

Done. Changes made:

  1. Schedule header: Left-aligned, removed sub-header with location
  2. QR popup: Now shows Summary (bold) and Location on the left, QR code on the right
  3. Input handler: Passes full event object to QROverlay
User

Write a one-time php script that takes zero dependencies, reads fosdem-2026.json, as per { "events": [ { "id": "00133708-8a63-53ed-86d9-4a9782a356c1", "legacyId": "8939", "date": "2026-01-31", "room": "AW1.126", "startTime": "12:10", "duration": "00:15", "title": "Creating an Open Source Global Solar Forecast and Dashboard", "abstract": "

Solar energy is predicted to be the largest form of power generation globally by 2040 and having accurate forecasts is critical to balancing the grid. Unlike fossil fuels, renewable energy resources are unpredictable in terms of power generation from one hour to the next. In order to balance the grid, operators need a close estimate of when and how much solar and wind power will be generated on a given day.

\n

Open Climate Fix (an open source AI company) developed and deployed PVNet, a large ML model which forecasts solar generation for the next 36 hours. The forecasts are used by the UK electricity grid operator for real-time decision making and for reserve planning. These forecasts can save 300,000 tonnes of CO₂ and £30 million per year.

\n

But how do we have a global impact? We decided to build a lightweight solar forecast that works anywhere in the world, which we showcased last year at FOSDEM. Combining this with every country's solar capacity, we are able to produce a solar forecast for every country in the world. In this talk, we'll demo our Global Forecast and discuss how this forecast can support grid transition as well as open-source renewable energy projects all over the globe.

\n

Open Climate Fix is an open-source not for profit company using machine learning (ML) to respond to the need for accurate renewable energy forecasts. Connecting energy industry practitioners with ML researchers doing cutting-edge energy modelling is our aim, and one way we seek to do this is by making much of our code open-source.

", "type": "devroom", "track": "Energy", "persons": [ { "id": "2605", "name": "Peter Dudfield" }, { "id": "7031", "name": "Alex Udaltsova" } ], "videos": [], "links": [ { "title": "Chat room(web)", "href": "https://chat.fosdem.org/#/room/#2026-energy:fosdem.org" }, { "title": "Chat room(app)", "href": "https://matrix.to/#/#2026-energy:fosdem.org?web-instance[element.io]=chat.fosdem.org" }, { "title": "Submit Feedback", "href": "https://pretalx.fosdem.org/fosdem-2026/talk/M3TKEE/feedback/" } ], "chat": null }, then generates a abstracts.json file which has a mapping of event ID -> abstract but strips away all html tags. The event id is M3TKEE from the submit feedback link. Pick the pretalx link always. If the link is not present, do not include it.

Assistant
Thinking

The user wants a PHP script that: 1. Reads fosdem-2026.json 2. Extracts the event ID from the pretalx submit feedback link (e.g., "https://pretalx.fosdem.org/fosdem-2026/talk/M3TKEE/feedback/" -> "M3TKEE") 3. Strips HTML tags from the abstract 4. Creates a mapping of event ID -> stripped abstract 5. Outputs to abstracts.json 6. Zero dependencies 7. Only includes events that have the pretalx link

Assistant
📝 Write generate-abstracts.php
/home/nemo/projects/personal/fosdem-playdate/generate-abstracts.php
#!/usr/bin/env php
<?php
/**
 * Generate abstracts.json from fosdem-2026.json
 * Maps event ID (from pretalx link) -> plain text abstract (HTML stripped)
 */

$inputFile = __DIR__ . '/fosdem-2026.json';
$outputFile = __DIR__ . '/abstracts.json';

if (!file_exists($inputFile)) {
    fwrite(STDERR, "Error: $inputFile not found\n");
    exit(1);
}

$json = file_get_contents($inputFile);
$data = json_decode($json, true);

if ($data === null) {
    fwrite(STDERR, "Error: Failed to parse JSON\n");
    exit(1);
}

$abstracts = [];

foreach ($data['events'] as $event) {
    // Skip if no abstract
    if (empty($event['abstract'])) {
        continue;
    }

    // Find pretalx link to extract event ID
    $eventId = null;
    if (!empty($event['links'])) {
        foreach ($event['links'] as $link) {
            if (strpos($link['href'], 'pretalx.fosdem.org') !== false && strpos($link['href'], '/talk/') !== false) {
                // Extract ID from URL like: https://pretalx.fosdem.org/fosdem-2026/talk/M3TKEE/feedback/
                if (preg_match('#/talk/([A-Z0-9]+)/#i', $link['href'], $matches)) {
                    $eventId = $matches[1];
                    break;
                }
            }
        }
    }

    // Skip if no pretalx link found
    if ($eventId === null) {
        continue;
    }

    // Strip HTML tags and decode entities
    $plainText = strip_tags($event['abstract']);
    $plainText = html_entity_decode($plainText, ENT_QUOTES | ENT_HTML5, 'UTF-8');

    // Normalize whitespace
    $plainText = preg_replace('/\s+/', ' ', $plainText);
    $plainText = trim($plainText);

    $abstracts[$eventId] = $plainText;
}

// Write output
$output = json_encode($abstracts, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
file_put_contents($outputFile, $output);

echo "Generated $outputFile with " . count($abstracts) . " abstracts\n";
Tool reply
File created successfully at: /home/nemo/projects/personal/fosdem-playdate/generate-abstracts.php
Assistant
Thinking

Let me make it executable as well.

Assistant
$ Bash
Make script executable
chmod +x /home/nemo/projects/personal/fosdem-playdate/generate-abstracts.php
Tool reply


Assistant


Thinking
Done. The script:
1. Reads fosdem-2026.json
2. For each event, finds the pretalx link and extracts the event ID (e.g., M3TKEE)
3. Strips HTML tags from the abstract
4. Decodes HTML entities
5. Normalizes whitespace
6. Only includes events that have a pretalx link
7. Outputs to abstracts.json


The user can run it with php generate-abstracts.php or ./generate-abstracts.php


Assistant


Done. Run with:


php generate-abstracts.php



The script:
- Extracts event ID from pretalx link (/talk/M3TKEE/ → M3TKEE)
- Strips HTML tags and decodes entities
- Normalizes whitespace
- Skips events without pretalx link
- Outputs to abstracts.json


User


remove all emojis and convert smart quotes to regular quotes as well in the same script. The chmod was stupid


Assistant


Thinking
The user wants me to:
1. Remove all emojis from the abstract
2. Convert smart quotes to regular quotes
3. Remove the chmod step (they don't want the file to be executable)


Let me update the PHP script.


Assistant


✏️ Edit generate-abstracts.php


/home/nemo/projects/personal/fosdem-playdate/generate-abstracts.php




−
#!/usr/bin/env php
<?php
/**
 * Generate abstracts.json from fosdem-2026.json
 * Maps event ID (from pretalx link) -> plain text abstract (HTML stripped)
 */

$inputFile = __DIR__ . '/fosdem-2026.json';
$outputFile = __DIR__ . '/abstracts.json';

if (!file_exists($inputFile)) {
    fwrite(STDERR, "Error: $inputFile not found\n");
    exit(1);
}

$json = file_get_contents($inputFile);
$data = json_decode($json, true);

if ($data === null) {
    fwrite(STDERR, "Error: Failed to parse JSON\n");
    exit(1);
}

$abstracts = [];

foreach ($data['events'] as $event) {
    // Skip if no abstract
    if (empty($event['abstract'])) {
        continue;
    }

    // Find pretalx link to extract event ID
    $eventId = null;
    if (!empty($event['links'])) {
        foreach ($event['links'] as $link) {
            if (strpos($link['href'], 'pretalx.fosdem.org') !== false && strpos($link['href'], '/talk/') !== false) {
                // Extract ID from URL like: https://pretalx.fosdem.org/fosdem-2026/talk/M3TKEE/feedback/
                if (preg_match('#/talk/([A-Z0-9]+)/#i', $link['href'], $matches)) {
                    $eventId = $matches[1];
                    break;
                }
            }
        }
    }

    // Skip if no pretalx link found
    if ($eventId === null) {
        continue;
    }

    // Strip HTML tags and decode entities
    $plainText = strip_tags($event['abstract']);
    $plainText = html_entity_decode($plainText, ENT_QUOTES | ENT_HTML5, 'UTF-8');

    // Normalize whitespace
    $plainText = preg_replace('/\s+/', ' ', $plainText);
    $plainText = trim($plainText);

    $abstracts[$eventId] = $plainText;
}


+
<?php
/**
 * Generate abstracts.json from fosdem-2026.json
 * Maps event ID (from pretalx link) -> plain text abstract (HTML stripped)
 */

$inputFile = __DIR__ . '/fosdem-2026.json';
$outputFile = __DIR__ . '/abstracts.json';

if (!file_exists($inputFile)) {
    fwrite(STDERR, "Error: $inputFile not found\n");
    exit(1);
}

$json = file_get_contents($inputFile);
$data = json_decode($json, true);

if ($data === null) {
    fwrite(STDERR, "Error: Failed to parse JSON\n");
    exit(1);
}

function cleanText($text) {
    // Strip HTML tags and decode entities
    $text = strip_tags($text);
    $text = html_entity_decode($text, ENT_QUOTES | ENT_HTML5, 'UTF-8');

    // Convert smart quotes to regular quotes
    $text = str_replace(
        ["\u{2018}", "\u{2019}", "\u{201C}", "\u{201D}", "\u{2032}", "\u{2033}"],
        ["'", "'", '"', '"', "'", '"'],
        $text
    );

    // Remove emojis (Unicode emoji ranges)
    $text = preg_replace('/[\x{1F600}-\x{1F64F}]/u', '', $text); // Emoticons
    $text = preg_replace('/[\x{1F300}-\x{1F5FF}]/u', '', $text); // Misc symbols
    $text = preg_replace('/[\x{1F680}-\x{1F6FF}]/u', '', $text); // Transport
    $text = preg_replace('/[\x{1F1E0}-\x{1F1FF}]/u', '', $text); // Flags
    $text = preg_replace('/[\x{2600}-\x{26FF}]/u', '', $text);   // Misc symbols
    $text = preg_replace('/[\x{2700}-\x{27BF}]/u', '', $text);   // Dingbats
    $text = preg_replace('/[\x{FE00}-\x{FE0F}]/u', '', $text);   // Variation selectors
    $text = preg_replace('/[\x{1F900}-\x{1F9FF}]/u', '', $text); // Supplemental symbols
    $text = preg_replace('/[\x{1FA00}-\x{1FA6F}]/u', '', $text); // Chess symbols
    $text = preg_replace('/[\x{1FA70}-\x{1FAFF}]/u', '', $text); // Symbols extended
    $text = preg_replace('/[\x{231A}-\x{231B}]/u', '', $text);   // Watch, hourglass
    $text = preg_replace('/[\x{23E9}-\x{23F3}]/u', '', $text);   // Media symbols
    $text = preg_replace('/[\x{23F8}-\x{23FA}]/u', '', $text);   // Media symbols
    $text = preg_replace('/[\x{25AA}-\x{25AB}]/u', '', $text);   // Squares
    $text = preg_replace('/[\x{25B6}]/u', '', $text);            // Play button
    $text = preg_replace('/[\x{25C0}]/u', '', $text);            // Reverse button
    $text = preg_replace('/[\x{25FB}-\x{25FE}]/u', '', $text);   // Squares
    $text = preg_replace('/[\x{2614}-\x{2615}]/u', '', $text);   // Umbrella, coffee
    $text = preg_replace('/[\x{2648}-\x{2653}]/u', '', $text);   // Zodiac
    $text = preg_replace('/[\x{267F}]/u', '', $text);            // Wheelchair
    $text = preg_replace('/[\x{2693}]/u', '', $text);            // Anchor
    $text = preg_replace('/[\x{26A1}]/u', '', $text);            // High voltage
    $text = preg_replace('/[\x{26AA}-\x{26AB}]/u', '', $text);   // Circles
    $text = preg_replace('/[\x{26BD}-\x{26BE}]/u', '', $text);   // Sports
    $text = preg_replace('/[\x{26C4}-\x{26C5}]/u', '', $text);   // Weather
    $text = preg_replace('/[\x{26CE}]/u', '', $text);            // Ophiuchus
    $text = preg_replace('/[\x{26D4}]/u', '', $text);            // No entry
    $text = preg_replace('/[\x{26EA}]/u', '', $text);            // Church
    $text = preg_replace('/[\x{26F2}-\x{26F3}]/u', '', $text);   // Fountain, golf
    $text = preg_replace('/[\x{26F5}]/u', '', $text);            // Sailboat
    $text = preg_replace('/[\x{26FA}]/u', '', $text);            // Tent
    $text = preg_replace('/[\x{26FD}]/u', '', $text);            // Fuel pump
    $text = preg_replace('/[\x{2702}]/u', '', $text);            // Scissors
    $text = preg_replace('/[\x{2705}]/u', '', $text);            // Check mark
    $text = preg_replace('/[\x{2708}-\x{270D}]/u', '', $text);   // Airplane etc
    $text = preg_replace('/[\x{270F}]/u', '', $text);            // Pencil
    $text = preg_replace('/[\x{2712}]/u', '', $text);            // Black nib
    $text = preg_replace('/[\x{2714}]/u', '', $text);            // Check mark
    $text = preg_replace('/[\x{2716}]/u', '', $text);            // X mark
    $text = preg_replace('/[\x{271D}]/u', '', $text);            // Latin cross
    $text = preg_replace('/[\x{2721}]/u', '', $text);            // Star of David
    $text = preg_replace('/[\x{2728}]/u', '', $text);            // Sparkles
    $text = preg_replace('/[\x{2733}-\x{2734}]/u', '', $text);   // Eight spoked asterisk
    $text = preg_replace('/[\x{2744}]/u', '', $text);            // Snowflake
    $text = preg_replace('/[\x{2747}]/u', '', $text);            // Sparkle
    $text = preg_replace('/[\x{274C}]/u', '', $text);            // Cross mark
    $text = preg_replace('/[\x{274E}]/u', '', $text);            // Cross mark
    $text = preg_replace('/[\x{2753}-\x{2755}]/u', '', $text);   // Question marks
    $text = preg_replace('/[\x{2757}]/u', '', $text);            // Exclamation
    $text = preg_replace('/[\x{2763}-\x{2764}]/u', '', $text);   // Hearts
    $text = preg_replace('/[\x{2795}-\x{2797}]/u', '', $text);   // Math symbols
    $text = preg_replace('/[\x{27A1}]/u', '', $text);            // Arrow
    $text = preg_replace('/[\x{27B0}]/u', '', $text);            // Curly loop
    $text = preg_replace('/[\x{27BF}]/u', '', $text);            // Double curly loop
    $text = preg_replace('/[\x{2934}-\x{2935}]/u', '', $text);   // Arrows
    $text = preg_replace('/[\x{2B05}-\x{2B07}]/u', '', $text);   // Arrows
    $text = preg_replace('/[\x{2B1B}-\x{2B1C}]/u', '', $text);   // Squares
    $text = preg_replace('/[\x{2B50}]/u', '', $text);            // Star
    $text = preg_replace('/[\x{2B55}]/u', '', $text);            // Circle
    $text = preg_replace('/[\x{3030}]/u', '', $text);            // Wavy dash
    $text = preg_replace('/[\x{303D}]/u', '', $text);            // Part alternation
    $text = preg_replace('/[\x{3297}]/u', '', $text);            // Circled ideograph
    $text = preg_replace('/[\x{3299}]/u', '', $text);            // Circled ideograph

    // Normalize whitespace
    $text = preg_replace('/\s+/', ' ', $text);
    $text = trim($text);

    return $text;
}

$abstracts = [];

foreach ($data['events'] as $event) {
    // Skip if no abstract
    if (empty($event['abstract'])) {
        continue;
    }

    // Find pretalx link to extract event ID
    $eventId = null;
    if (!empty($event['links'])) {
        foreach ($event['links'] as $link) {
            if (strpos($link['href'], 'pretalx.fosdem.org') !== false && strpos($link['href'], '/talk/') !== false) {
                // Extract ID from URL like: https://pretalx.fosdem.org/fosdem-2026/talk/M3TKEE/feedback/
                if (preg_match('#/talk/([A-Z0-9]+)/#i', $link['href'], $matches)) {
                    $eventId = $matches[1];
                    break;
                }
            }
        }
    }

    // Skip if no pretalx link found
    if ($eventId === null) {
        continue;
    }

    $abstracts[$eventId] = cleanText($event['abstract']);
}






Tool reply
The file /home/nemo/projects/personal/fosdem-playdate/generate-abstracts.php has been updated successfully.


Assistant


Thinking
Good, I've updated the script to:
1. Remove the shebang line (no more chmod)
2. Added a cleanText function that:
   - Strips HTML tags
   - Decodes HTML entities
   - Converts smart quotes to regular quotes
   - Removes emojis (comprehensive list of Unicode emoji ranges)
   - Normalizes whitespace


The emoji removal is quite comprehensive - it covers the main emoji ranges in Unicode.


Assistant


Done. Updated the script to:
- Remove shebang (run with php generate-abstracts.php)
- Convert smart quotes (' ' " ") to regular quotes
- Remove emojis (all major Unicode emoji ranges)
- Strip HTML and normalize whitespace


User


The location should be in top right in the qr popup. Use the bottom left space to fill the abstract. Read abstracts.json in the code at loadtime. Move the qr to bottom right of the popup so we get more space for the summary. In the qr popup, the crank can be used to scroll the abstract text.




Assistant


Thinking
The user wants to:
1. Move location to top right in QR popup
2. Add abstract text that can be scrolled with the crank
3. Move QR code to bottom right
4. Load abstracts.json at loadtime
5. Use crank to scroll abstract in QR popup


I need to:
1. Create a module to load abstracts.json
2. Update qrOverlay.lua to show location top-right, summary, abstract (scrollable), and QR bottom-right
3. Update input handlers to handle crank scrolling in QR view


Let me start by creating the abstracts loader, then update the QR overlay.


Assistant


📝 Write abstracts.lua


/home/nemo/projects/personal/fosdem-playdate/source/data/abstracts.lua


-- Abstracts loader

Abstracts = {
    data = {},
}

function Abstracts.load()
    local file = playdate.file.open("abstracts.json", playdate.file.kFileRead)
    if not file then
        print("Could not open abstracts.json")
        return
    end

    local content = file:read(1024 * 1024)  -- Read up to 1MB
    file:close()

    if content then
        Abstracts.data = json.decode(content) or {}
        print("Loaded " .. Abstracts.count() .. " abstracts")
    end
end

function Abstracts.get(eventId)
    if eventId and Abstracts.data[eventId] then
        return Abstracts.data[eventId]
    end
    return nil
end

function Abstracts.count()
    local count = 0
    for _ in pairs(Abstracts.data) do
        count = count + 1
    end
    return count
end





Tool reply
File created successfully at: /home/nemo/projects/personal/fosdem-playdate/source/data/abstracts.lua


Assistant


Thinking
Now I need to update the QR overlay to have the new layout and scrollable abstract. Then update main.lua to import abstracts and load them, and update input handlers for crank scrolling.


Assistant


✏️ Edit qrOverlay.lua


/home/nemo/projects/personal/fosdem-playdate/source/ui/qrOverlay.lua




−
-- QR code overlay for displaying event details and QR code

QROverlay = {
    visible = false,
    qrImage = nil,
    currentEvent = nil,
}

local gfx <const> = playdate.graphics

function QROverlay.show(event)
    if not event or not event.EVENT_ID then
        print("No event to display")
        return
    end

    QROverlay.visible = true
    QROverlay.qrImage = nil
    QROverlay.currentEvent = event

    -- Load pre-generated QR code image
    local qrPath = "qr/" .. event.EVENT_ID
    QROverlay.qrImage = gfx.image.new(qrPath)

    if not QROverlay.qrImage then
        print("Could not load QR code: " .. qrPath)
    end
end

function QROverlay.hide()
    QROverlay.visible = false
    QROverlay.qrImage = nil
    QROverlay.currentEvent = nil
end

function QROverlay.isVisible()
    return QROverlay.visible
end

function QROverlay.draw()
    if not QROverlay.visible then return end

    local event = QROverlay.currentEvent

    -- Draw white background
    gfx.setColor(gfx.kColorWhite)
    gfx.fillRect(10, 20, 380, 200)

    -- Draw border
    gfx.setColor(gfx.kColorBlack)
    gfx.setLineWidth(2)
    gfx.drawRect(10, 20, 380, 200)
    gfx.setLineWidth(1)

    -- Left side: Summary and Location
    local textX = 20
    local textY = 30
    local textWidth = 220

    -- Summary (bold)
    if event and event.SUMMARY then
        gfx.drawTextInRect("*" .. event.SUMMARY .. "*", textX, textY, textWidth, 80, nil, "...", kTextAlignment.left)
    end

    -- Location
    if event and event.LOCATION then
        gfx.drawTextInRect(event.LOCATION, textX, textY + 90, textWidth, 40, nil, "...", kTextAlignment.left)
    end

    -- Right side: QR code
    local qrX = 290
    local qrY = 70
    if QROverlay.qrImage then
        QROverlay.qrImage:drawCentered(qrX, qrY + 50)
    else
        gfx.drawTextAligned("No QR", qrX, qrY + 50, kTextAlignment.center)
    end

    -- Draw dismiss instruction at bottom
    gfx.drawTextAligned("Press B to close", 200, 200, kTextAlignment.center)
end


+
-- QR code overlay for displaying event details and QR code

QROverlay = {
    visible = false,
    qrImage = nil,
    currentEvent = nil,
    abstractScroll = 0,
    abstractHeight = 0,
}

local gfx <const> = playdate.graphics

-- Layout constants
local POPUP_X = 10
local POPUP_Y = 10
local POPUP_WIDTH = 380
local POPUP_HEIGHT = 220
local PADDING = 8
local QR_SIZE = 80
local SUMMARY_HEIGHT = 50
local LOCATION_HEIGHT = 16
local ABSTRACT_Y_START = POPUP_Y + PADDING + SUMMARY_HEIGHT + 4

function QROverlay.show(event)
    if not event or not event.EVENT_ID then
        print("No event to display")
        return
    end

    QROverlay.visible = true
    QROverlay.qrImage = nil
    QROverlay.currentEvent = event
    QROverlay.abstractScroll = 0

    -- Load pre-generated QR code image
    local qrPath = "qr/" .. event.EVENT_ID
    QROverlay.qrImage = gfx.image.new(qrPath)

    if not QROverlay.qrImage then
        print("Could not load QR code: " .. qrPath)
    end

    -- Calculate abstract height for scrolling
    local abstract = Abstracts.get(event.EVENT_ID)
    if abstract then
        local abstractWidth = POPUP_WIDTH - PADDING * 3 - QR_SIZE
        local _, height = gfx.getTextSizeForMaxWidth(abstract, abstractWidth)
        QROverlay.abstractHeight = height
    else
        QROverlay.abstractHeight = 0
    end
end

function QROverlay.hide()
    QROverlay.visible = false
    QROverlay.qrImage = nil
    QROverlay.currentEvent = nil
    QROverlay.abstractScroll = 0
end

function QROverlay.isVisible()
    return QROverlay.visible
end

function QROverlay.scroll(amount)
    local maxScroll = math.max(0, QROverlay.abstractHeight - 80)
    QROverlay.abstractScroll = math.max(0, math.min(maxScroll, QROverlay.abstractScroll + amount))
end

function QROverlay.draw()
    if not QROverlay.visible then return end

    local event = QROverlay.currentEvent

    -- Draw white background
    gfx.setColor(gfx.kColorWhite)
    gfx.fillRect(POPUP_X, POPUP_Y, POPUP_WIDTH, POPUP_HEIGHT)

    -- Draw border
    gfx.setColor(gfx.kColorBlack)
    gfx.setLineWidth(2)
    gfx.drawRect(POPUP_X, POPUP_Y, POPUP_WIDTH, POPUP_HEIGHT)
    gfx.setLineWidth(1)

    local textX = POPUP_X + PADDING
    local textY = POPUP_Y + PADDING
    local textWidth = POPUP_WIDTH - PADDING * 3 - QR_SIZE

    -- Location (top right)
    if event and event.LOCATION then
        gfx.drawTextInRect(
            event.LOCATION,
            POPUP_X + PADDING,
            textY,
            POPUP_WIDTH - PADDING * 2,
            LOCATION_HEIGHT,
            nil, "...", kTextAlignment.right
        )
    end

    -- Summary (bold, below location)
    local summaryY = textY + LOCATION_HEIGHT + 2
    if event and event.SUMMARY then
        gfx.drawTextInRect(
            "*" .. event.SUMMARY .. "*",
            textX, summaryY,
            textWidth, SUMMARY_HEIGHT,
            nil, "...", kTextAlignment.left
        )
    end

    -- Abstract (scrollable, below summary)
    local abstractY = summaryY + SUMMARY_HEIGHT + 4
    local abstractHeight = POPUP_HEIGHT - (abstractY - POPUP_Y) - PADDING - 16
    local abstract = Abstracts.get(event and event.EVENT_ID)

    if abstract then
        -- Set clipping rect for abstract area
        gfx.setClipRect(textX, abstractY, textWidth, abstractHeight)

        -- Draw abstract with scroll offset
        gfx.drawTextInRect(
            abstract,
            textX, abstractY - QROverlay.abstractScroll,
            textWidth, QROverlay.abstractHeight + 100,
            nil, nil, kTextAlignment.left
        )

        -- Clear clip rect
        gfx.clearClipRect()

        -- Draw scroll indicator if content is scrollable
        if QROverlay.abstractHeight > abstractHeight then
            local scrollBarHeight = 40
            local scrollRange = QROverlay.abstractHeight - abstractHeight
            local scrollPos = (QROverlay.abstractScroll / scrollRange) * (abstractHeight - scrollBarHeight)
            gfx.fillRect(textX + textWidth + 2, abstractY + scrollPos, 3, scrollBarHeight)
        end
    end

    -- QR code (bottom right)
    local qrX = POPUP_X + POPUP_WIDTH - PADDING - QR_SIZE / 2
    local qrY = POPUP_Y + POPUP_HEIGHT - PADDING - QR_SIZE / 2 - 12
    if QROverlay.qrImage then
        QROverlay.qrImage:drawCentered(qrX, qrY)
    end

    -- Draw dismiss instruction at bottom
    gfx.drawTextAligned("B: close  Crank: scroll", POPUP_X + (POPUP_WIDTH - QR_SIZE) / 2, POPUP_Y + POPUP_HEIGHT - 14, kTextAlignment.center)
end






Tool reply
The file /home/nemo/projects/personal/fosdem-playdate/source/ui/qrOverlay.lua has been updated successfully.


Assistant


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