Added YouTube summarizer app by lemcoder · Pull Request #50 · Liquid4All/LeapSDK-Examples

lemcoder · 2026-05-12T22:53:43Z

This pull request introduces the initial implementation of the YouTube summarizer Android app, including project setup, core app structure, network and data layer, and basic UI flow. The main themes are project configuration, app architecture, and YouTube data fetching.

tl;dw

TLDW (Too Long Didn't Watch) Is a summary generation app for YouTube videos.

Demo

Screen_recording_20260504_222008.mp4

Copilot

Pull request overview

This PR adds a new Android sample app (“tl;dw”) that fetches YouTube transcripts and generates on-device TL;DR summaries using the Leap SDK, including the initial app architecture (data/domain/ui), Gradle project setup, and a basic model download + summarize UI flow.

Changes:

Introduces a new Android project with Gradle wrapper, version catalog, and module configuration.
Implements transcript fetching (InnerTube + captions XML parsing) and on-device TL;DR generation via Leap SDK model runner/downloader.
Adds initial Compose UI flows (model download screen + transcript screen) plus unit tests for core logic.

Reviewed changes

Copilot reviewed 66 out of 68 changed files in this pull request and generated 19 comments.

Show a summary per file

File	Description
Android/YouTubeSummarizer/settings.gradle.kts	Gradle settings + dependency repositories for the new project
Android/YouTubeSummarizer/README.md	Project readme + demo link
Android/YouTubeSummarizer/gradlew.bat	Gradle wrapper script (Windows)
Android/YouTubeSummarizer/gradlew	Gradle wrapper script (POSIX)
Android/YouTubeSummarizer/gradle/wrapper/gradle-wrapper.properties	Gradle distribution configuration
Android/YouTubeSummarizer/gradle/libs.versions.toml	Version catalog for dependencies/plugins
Android/YouTubeSummarizer/gradle.properties	Gradle/Android build flags
Android/YouTubeSummarizer/build.gradle.kts	Top-level build configuration (plugin aliases)
Android/YouTubeSummarizer/app/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker	Enables Mockito inline mock maker for tests
Android/YouTubeSummarizer/app/src/test/java/com/tldw/app/ui/transcriptscreen/TranscriptViewModelTest.kt	Unit tests for transcript screen ViewModel state machine
Android/YouTubeSummarizer/app/src/test/java/com/tldw/app/domain/util/YouTubeUrlParserTest.kt	Unit tests for parsing YouTube URLs/video IDs
Android/YouTubeSummarizer/app/src/test/java/com/tldw/app/domain/usecase/FetchTranscriptUseCaseTest.kt	Unit tests for transcript fetching use case
Android/YouTubeSummarizer/app/src/test/java/com/tldw/app/data/remote/YouTubeApiServiceTest.kt	Tests for HTTP request formation and DTO parsing
Android/YouTubeSummarizer/app/src/main/res/values/strings.xml	App strings (and currently a misplaced color resource)
Android/YouTubeSummarizer/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml	Adaptive launcher icon definition
Android/YouTubeSummarizer/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml	Round adaptive launcher icon definition
Android/YouTubeSummarizer/app/src/main/res/drawable/ic_launcher_foreground.xml	Launcher icon foreground vector
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/transcriptscreen/TranscriptViewModelFactory.kt	Factory wiring for transcript ViewModel
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/transcriptscreen/TranscriptViewModel.kt	Transcript screen logic: fetch, generate, state handling
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/transcriptscreen/TranscriptState.kt	Transcript screen state + phase enum
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/transcriptscreen/TranscriptScreenRoute.kt	Route-level wiring for transcript screen dependencies
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/transcriptscreen/TranscriptEvent.kt	UI event definitions for transcript screen
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/theme/TldwTheme.kt	Material3 theme definitions
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/modelscreen/ModelDownloadViewModelFactory.kt	Factory wiring for model download ViewModel
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/modelscreen/ModelDownloadViewModel.kt	Model download flow logic + error mapping
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/modelscreen/ModelDownloadState.kt	Model download screen state
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/modelscreen/ModelDownloadScreenRoute.kt	Route-level wiring for model download screen
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/modelscreen/ModelDownloadScreen.kt	Compose UI for initial/download/failure/no-internet states
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/modelscreen/ModelDownloadEvent.kt	UI event definitions for model download screen
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/mocks/tweaks-panel.jsx	Design mock tooling (currently located under Android java sources)
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/mocks/tldw-screens.jsx	Design mock screens (currently located under Android java sources)
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/mocks/tldw-frame.jsx	Design mock frame (currently located under Android java sources)
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/mocks/tldw-app.jsx	Design mock app harness (currently located under Android java sources)
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/mocks/design-canvas.jsx	Design mock canvas (currently located under Android java sources)
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/mocks/android-frame.jsx	Design mock Android frame (currently located under Android java sources)
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/ui/component/ShapeProgressIndicator.kt	Reusable custom path-based progress indicator
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/MainViewModelFactory.kt	Factory wiring for main app ViewModel
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/MainViewModel.kt	Main app state: checks if model is downloaded
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/MainActivity.kt	App entry point + navigation between model download and transcript flow
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/util/YouTubeUrlParser.kt	YouTube URL/video ID parsing utility
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/usecase/UnloadModelUseCase.kt	Domain use case: unload model
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/usecase/LoadModelUseCase.kt	Domain use case: load model
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/usecase/GenerateTldrUseCase.kt	Domain use case: generate summary
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/usecase/FetchTranscriptUseCase.kt	Domain use case: parse URL and fetch transcript
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/usecase/DownloadModelUseCase.kt	Domain use case: download model with cancellation cleanup
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/usecase/CheckModelDownloadedUseCase.kt	Domain use case: check model availability
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/repository/TranscriptRepository.kt	Transcript repository contract
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/repository/ModelRepository.kt	Model repository contract
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/model/VideoInfo.kt	Domain model for video metadata + formatting helpers
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/model/TranscriptSnippet.kt	Domain model for transcript snippet
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/model/Transcript.kt	Domain model for transcript + flattening helper
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/model/GenerationFailure.kt	Domain model for generation failure info
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/model/DownloadProgress.kt	Domain model for download progress
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/domain/model/DownloadFailure.kt	Domain model for download failure types
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/data/repository/TranscriptRepositoryImpl.kt	InnerTube/captions implementation of transcript repository
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/data/repository/ModelRepositoryImpl.kt	Leap downloader/runner implementation of model repository
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/data/remote/YouTubeApiService.kt	OkHttp/Gson service for YouTube HTTP calls
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/data/remote/TranscriptXmlParser.kt	XML parsing for timedtext transcript responses
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/data/dto/TranscriptSnippetDto.kt	DTO for parsed XML snippets
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/data/dto/InnerTubeResponseDto.kt	DTOs for InnerTube player endpoint response
Android/YouTubeSummarizer/app/src/main/java/com/tldw/app/Consts.kt	App constants (model identifiers, prompt, sample videos)
Android/YouTubeSummarizer/app/src/main/AndroidManifest.xml	App manifest: permissions, launcher, share intent
Android/YouTubeSummarizer/app/proguard-rules.pro	ProGuard rules placeholder
Android/YouTubeSummarizer/app/build.gradle.kts	Android module build configuration + dependencies
Android/YouTubeSummarizer/.gitignore	Android project gitignore

Comments suppressed due to low confidence (1)

Android/YouTubeSummarizer/app/src/main/AndroidManifest.xml:22

The activity also references @style/Theme.AppCompat.DayNight.NoActionBar here; once the app theme is corrected, it’s usually better to reference the same app theme (or omit the activity theme) to avoid drifting configurations.

        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">

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iamstuffed

codex: I verified that ./gradlew assembleDebug passes for the new demo, but ./gradlew test fails at compileDebugUnitTestKotlin because TranscriptViewModelTest is missing the new unloadModelUseCase constructor argument. Leaving these as review comments rather than requesting changes.

Copilot

Pull request overview

Copilot reviewed 61 out of 62 changed files in this pull request and generated 8 comments.

+        maven {
+            name = "Central Portal Snapshots"
+            url = uri("https://s01.oss.sonatype.org/content/repositories/snapshots/")
+        }
+        maven { url = uri("https://jitpack.io") }
+    }


+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-bin.zip
+networkTimeout=10000


+[versions]
+agp = "9.2.0"
+kotlin = "2.3.21"
+coreKtx = "1.18.0"
+leapSdkAndroid = "0.10.2"
+lifecycleRuntimeKtx = "2.10.0"
+lifecycleRuntimeCompose = "2.10.0"
+activityCompose = "1.13.0"
+composeBom = "2026.04.01"
+coroutines = "1.10.2"
+viewmodelCompose = "2.10.0"
+okhttp = "5.3.2"
+gson = "2.14.0"


+      } finally {
+        // Use NonCancellable to ensure model unload completes even if job is cancelled
+        viewModelScope.launch(NonCancellable) { unloadModelUseCase() }
+      }


+  val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+  val capabilities = remember { cm.getNetworkCapabilities(cm.getActiveNetwork()) }
+  val wifiConnected = remember {
+    capabilities?.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) == true
+  }
+  val mobileConnected = remember {
+    capabilities?.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) == true
+  }


+      Text(
+        text = "Paste a YouTube link",
+        fontSize = 32.sp,
+        fontWeight = FontWeight.Medium,
+        lineHeight = 36.sp,
+        letterSpacing = (-0.8).sp,
+        color = MaterialTheme.colorScheme.onSurface,
+      )
+
+      if (!state.urlError) {
+        Spacer(Modifier.height(10.dp))
+        Text(
+          text = "We'll grab the transcript and summarize it on-device in a few seconds.",
+          style = MaterialTheme.typography.bodyMedium,
+          color = MaterialTheme.colorScheme.onSurfaceVariant,
+          lineHeight = 20.sp,
+        )
+      }
+
+      Spacer(Modifier.height(24.dp))
+
+      // URL input
+      OutlinedTextField(
+        value = state.url,
+        onValueChange = { onEvent(TranscriptEvent.UrlChanged(it)) },
+        modifier = Modifier.fillMaxWidth(),
+        placeholder = {
+          Text(
+            text = "youtube.com/watch?v=…",
+            color = MaterialTheme.colorScheme.outline,
+            fontSize = 15.sp,


+    if (modelClass.isAssignableFrom(MainViewModel::class.java)) {
+      return MainViewModel(checkModelDownloadedUseCase) as T
+    }
+    throw IllegalArgumentException("Unknown ViewModel class")


+    // Standard watch URL: ?v=VIDEO_ID
+    if (trimmed.contains("v=")) {
+      val id = trimmed.substringAfter("v=").substringBefore("&").substringBefore("#")
+      if (VIDEO_ID_PATTERN.matches(id)) return id
+    }


Added YouTube summarizer app

314eb7c

iamstuffed requested a review from Copilot May 13, 2026 05:27

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iamstuffed reviewed May 13, 2026

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fix: Applied PR suggestions

ea0683c

lemcoder force-pushed the mikolaj/YouTubeSummarizer branch from ca803a6 to ea0683c Compare May 13, 2026 20:20

iamstuffed requested a review from Copilot May 13, 2026 20:23

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iamstuffed approved these changes May 13, 2026

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ci: add unit test workflow for YouTubeSummarizer

31f41e4

lemcoder merged commit e2f8874 into main May 14, 2026
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Added YouTube summarizer app - #50

Added YouTube summarizer app#50
lemcoder merged 3 commits into
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mikolaj/YouTubeSummarizer

lemcoder commented May 12, 2026 •

edited

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lemcoder commented May 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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tl;dw

Demo

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Pull request overview

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lemcoder commented May 12, 2026 •

edited

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