Podcast Ad-Blocking POC - Status Report

✅ COMPLETED - POC is Ready to Test!

Date: December 26, 2025 Server Status: Running on http://localhost:3000 Compilation: ✅ Successfully compiled 1510 modules

🎯 What's Been Implemented

1. Core Ad Segment Services

✅ Episode Identity System (adSegmentIdentity.ts)

GUID-based episode keys (primary)
SHA-256 hash fallback: hash(feedUrl + enclosureUrl + pubDate)
CDATA normalization - handles <![CDATA[ guid ]]> wrappers in RSS feeds
Helper functions for Podverse NowPlayingItem objects

✅ Ad Segment Validation & Merging (adSegmentMerge.ts)

Validates ad segments (startTime < endTime, non-negative)
O(n log n) interval merging for overlapping ads
O(log n) binary search for finding ad at current time
Statistics: overlap detection, merged count

✅ Fixture Provider (adSegmentFixtureProvider.ts)

Implements AdSegmentProvider interface
Loads from src/lib/fixtures/adSegments/{episodeKey}.json
In-memory caching
Tagger profile loading from src/lib/fixtures/profiles/taggers.json

✅ Auto-Skip Logic (playerAdSkip.ts)

PlayerAdSkipManager singleton with skip guards:
- 1000ms debounce window
- Tracks last skipped segment
- Allows re-entry after manual scrub backward
Public API: initializeAdSkipForEpisode(), setSkipAdsEnabled(), handlePlayerTimeUpdate()

2. Player Integration

✅ Modified Files:

player.tsx - Loads ad segments when episode loads
PlayerAPIAudio.tsx - Calls skip logic on timeupdate
PlayerItemOptions.tsx - Added Skip Ads toggle button
PlayerOptionButton.tsx - Added 'skip-ads' button type with forward icon

3. Test Data - Real Podcast Episodes

✅ Three Real RSS Feeds with Actual MP3 Files:

Test	Podcast	Episode GUID	MP3 File	Ads
1	What Bitcoin Did	`ec8b4655-cb61-4d69-87ee-dbdba77c0a62`	AUDIO---DEFAULT---dcfdc6d6-489e-4ac7-b9a4-5629cc632395.mp3	3 ads
2	TFTC	`2d4217bb-799b-4192-a559-348e82e2ea0e`	AUDIO---DEFAULT---34eb3a45-d135-453e-a790-58a744da35ba.mp3	3 ads
3	TIP	`b47746b8-daa3-11f0-b08a-233a79f7667c`	PPLLC1896786790.mp3	3 ads (CDATA GUID)

Ad Timecodes (in seconds):

Test 1 - What Bitcoin Did:

Pre-roll: 2s → 60s (00:00:02 - 00:01:00)
Mid-roll #1: 669s → 815s (00:11:09 - 00:13:35)
Mid-roll #2: 2263s → 2403s (00:37:43 - 00:40:03)

Test 2 - TFTC:

Pre-roll: 3s → 31s (00:00:03 - 00:00:31)
Mid-roll #1: 1632s → 1759s (00:27:12 - 00:29:19)
Mid-roll #2: 2569s → 2689s (00:42:49 - 00:44:49)

Test 3 - TIP:

Pre-roll: 50s → 88s (00:00:50 - 00:01:28)
Mid-roll #1: 963s → 1196s (00:16:03 - 00:19:56)
Mid-roll #2: 1922s → 2133s (00:32:02 - 00:35:33)

4. Unit Tests

✅ Comprehensive Test Coverage:

adSegmentMerge.test.ts - 15+ tests
adSegmentIdentity.test.ts - 20+ tests
- Including CDATA normalization tests
- Real-world episode GUID tests

Run tests:

npm test

5. Documentation

✅ Complete Documentation:

PODCAST_AD_BLOCKING_POC.md - Main POC specification
TESTING_GUIDE.md - Step-by-step testing procedures
REAL_RSS_FEEDS_SETUP.md - RSS feed setup details
NOSTR_INTEGRATION.md - Future Nostr integration plan
public/test-podcasts/MAPPING.md - MP3 file mapping

🚀 How to Test the POC

Quick Start (Browser Console Testing)

Since this is a POC without full database integration, the fastest way to test is via browser console:

Open the app: http://localhost:3000
Open Browser DevTools (F12)
Go to Console tab
Run the test commands below

Test Episode 1 (What Bitcoin Did)

// Import the necessary functions
const { extractEpisodeKeyFromNowPlayingItem } = await import('/src/services/adSegments/adSegmentIdentity.ts')
const { fixtureAdSegmentProvider } = await import('/src/services/adSegments/adSegmentFixtureProvider.ts')
const { mergeAdSegments } = await import('/src/services/adSegments/adSegmentMerge.ts')

// Test episode 1
const testEpisode1 = {
  episodeGuid: 'ec8b4655-cb61-4d69-87ee-dbdba77c0a62',
  podcastFeedUrl: 'https://feeds.fountain.fm/UZSKQcrOnhqYS1JopxGg',
  episodeMediaUrl: 'https://feeds.fountain.fm/UZSKQcrOnhqYS1JopxGg/items/RpJavE7EEgZNW5hpgUDJ/files/AUDIO---DEFAULT---dcfdc6d6-489e-4ac7-b9a4-5629cc632395.mp3'
}

const episodeKey = extractEpisodeKeyFromNowPlayingItem(testEpisode1)
console.log('Episode Key:', episodeKey)

const adSegments = await fixtureAdSegmentProvider.fetchAdSegments(episodeKey)
console.log('Ad Segments:', adSegments)

const mergedSegments = mergeAdSegments(adSegments)
console.log('Merged Ad Segments:', mergedSegments)

Expected Output:

Episode Key: ec8b4655-cb61-4d69-87ee-dbdba77c0a62
Ad Segments: (3) [{…}, {…}, {…}]
  0: {id: 'ad-test1-001', startTime: 2, endTime: 60, …}
  1: {id: 'ad-test1-002', startTime: 669, endTime: 815, …}
  2: {id: 'ad-test1-003', startTime: 2263, endTime: 2403, …}
Merged Ad Segments: (3) [{…}, {…}, {…}]

Test Episode 3 (CDATA GUID - TIP)

const testEpisode3 = {
  episodeGuid: '<![CDATA[ b47746b8-daa3-11f0-b08a-233a79f7667c ]]>',
  podcastFeedUrl: 'https://feeds.megaphone.fm/PPLLC8974708240',
  episodeMediaUrl: 'https://www.podtrac.com/pts/redirect.mp3/pdst.fm/e/traffic.megaphone.fm/PPLLC1896786790.mp3'
}

const episodeKey3 = extractEpisodeKeyFromNowPlayingItem(testEpisode3)
console.log('Episode Key (CDATA normalized):', episodeKey3)
// Should output: b47746b8-daa3-11f0-b08a-233a79f7667c (without CDATA wrapper)

const adSegments3 = await fixtureAdSegmentProvider.fetchAdSegments(episodeKey3)
console.log('Ad Segments:', adSegments3)

Expected Output:

Episode Key (CDATA normalized): b47746b8-daa3-11f0-b08a-233a79f7667c
Ad Segments: (3) [{…}, {…}, {…}]
  0: {id: 'ad-test3-001', startTime: 50, endTime: 88, …}
  1: {id: 'ad-test3-002', startTime: 963, endTime: 1196, …}
  2: {id: 'ad-test3-003', startTime: 1922, endTime: 2133, …}

Verify MP3 Files Are Accessible

Open these URLs in your browser to confirm the MP3 files are publicly accessible:

📋 Testing Checklist

Use TESTING_GUIDE.md for the complete testing procedure. Here's a quick checklist:

Core Functionality

Ad segments load from fixtures (check console log)
Skip Ads toggle appears in player controls
Toggle ON/OFF works (visual state change)
Auto-skip jumps to ad endTime when toggle is ON
No skip occurs when toggle is OFF

GUID Handling

Test 1 & 2: Plain GUID works
Test 3: CDATA-wrapped GUID works (normalized correctly)
Console shows correct episode key for all three

Skip Guards

Each ad segment only skipped once per entry
Re-scrubbing into ad triggers skip again
No infinite skip loops (debounce works)
Console logs show skip actions clearly

🐛 Troubleshooting

Problem: Ad segments not loading

Check:

Console for error messages
Fixture filenames match episode GUIDs exactly
JSON files are valid (no syntax errors)

Debug:

// In browser console:
const { generateEpisodeKey } = await import('/src/services/adSegments/adSegmentIdentity.ts')

const testGuid = 'ec8b4655-cb61-4d69-87ee-dbdba77c0a62'
const key = generateEpisodeKey({ guid: testGuid })
console.log('Generated key:', key)
// Should match fixture filename

Problem: Skip not working

Check:

Skip Ads toggle is ON (check button state)
Console shows skip logs when entering ad
Ad timecodes are correct (check fixture JSON)
Player is using audio (not video)

Debug:

// In browser console:
const { getSkipAdsEnabled, getMergedAdSegments } = await import('/src/services/player/playerAdSkip.ts')

console.log('Skip Ads Enabled:', getSkipAdsEnabled())
console.log('Merged Segments:', getMergedAdSegments())

Problem: CDATA GUID not working (Test 3)

Check:

const { generateEpisodeKey } = await import('/src/services/adSegments/adSegmentIdentity.ts')

const cdataGuid = '<![CDATA[ b47746b8-daa3-11f0-b08a-233a79f7667c ]]>'
const key = generateEpisodeKey({ guid: cdataGuid })
console.log('Normalized key:', key)
// Should be: b47746b8-daa3-11f0-b08a-233a79f7667c (without CDATA)

🎯 Success Criteria

The POC is successful if:

✅ All three episodes load ad segments correctly (console log confirms) ✅ GUID normalization works for all formats (plain + CDATA) ✅ Skip Ads toggle appears and works ✅ Auto-skip jumps to ad endTime when enabled ✅ Skip guards prevent infinite loops ✅ Re-entering ads triggers skip again ✅ Toggle OFF disables auto-skip ✅ No player crashes or critical errors

📚 Next Steps

Run browser console tests to verify fixture loading and GUID normalization
Test auto-skip functionality (if player integration is working)
Run unit tests: npm test
Review documentation for future Nostr integration plan

🔧 Technical Notes

Dependency Resolution

Issue: @sentry/nextjs 8.52.1 required Next.js 13.2.0+ but project uses 12.3.4 Fix: Downgraded to @sentry/nextjs@7.119.0 (compatible with Next.js 12)

Windows Compatibility

Issue: npm run dev uses Unix-style NODE_OPTIONS='--inspect' syntax Workaround: Run npx next dev directly instead of npm script

Current Server Status

✅ Running on http://localhost:3000 ✅ Compiled successfully (1510 modules) ⚠️ Warnings (non-critical):

Sentry config property not in Next.js 12 schema (expected for older version)
Browserslist outdated (cosmetic)

POC Status: READY FOR TESTING 🎉

For detailed testing procedures, see TESTING_GUIDE.md

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Podcast Ad-Blocking POC - Status Report

✅ COMPLETED - POC is Ready to Test!

🎯 What's Been Implemented

1. Core Ad Segment Services

2. Player Integration

3. Test Data - Real Podcast Episodes

4. Unit Tests

5. Documentation

🚀 How to Test the POC

Quick Start (Browser Console Testing)

Test Episode 1 (What Bitcoin Did)

Test Episode 3 (CDATA GUID - TIP)

Verify MP3 Files Are Accessible

📋 Testing Checklist

Core Functionality

GUID Handling

Skip Guards

🐛 Troubleshooting

Problem: Ad segments not loading

Problem: Skip not working

Problem: CDATA GUID not working (Test 3)

🎯 Success Criteria

📚 Next Steps

🔧 Technical Notes

Dependency Resolution

Windows Compatibility

Current Server Status