From 655eac9ad68f2af1843b87845431dad024790f5a Mon Sep 17 00:00:00 2001
From: matt1432 <matt@nelim.org>
Date: Fri, 15 Nov 2024 11:37:58 -0500
Subject: [PATCH] refactor(extract-subs): move to apps and split up code better

---
 apps/default.nix                              |   1 +
 .../subtitles => apps}/extract-subs/.envrc    |   1 +
 apps/extract-subs/default.nix                 |  32 ++++
 .../extract-subs/eslint.config.ts             |  14 +-
 .../extract-subs/package-lock.json            | Bin 80138 -> 91461 bytes
 apps/extract-subs/package.json                |  22 +++
 apps/extract-subs/src/app.ts                  | 157 ++++++++++++++++++
 apps/extract-subs/src/ffprobe.ts              |   8 +
 .../extract-subs/src}/lang-codes.ts           |   0
 apps/extract-subs/tsconfig.json               |  10 ++
 apps/tsconfig.json                            |  25 +++
 apps/update/.envrc                            |   1 +
 apps/update/src/app.ts                        |  10 +-
 apps/update/src/misc.ts                       |   2 +-
 apps/update/tsconfig.json                     |  25 +--
 .../subtitles/extract-subs/default.nix        |  49 ------
 .../modules/subtitles/extract-subs/main.ts    | 114 -------------
 .../subtitles/extract-subs/package.json       |  18 --
 .../subtitles/extract-subs/tsconfig.json      |  19 ---
 19 files changed, 273 insertions(+), 235 deletions(-)
 rename {devices/nos/modules/subtitles => apps}/extract-subs/.envrc (81%)
 create mode 100644 apps/extract-subs/default.nix
 rename {devices/nos/modules/subtitles => apps}/extract-subs/eslint.config.ts (97%)
 rename {devices/nos/modules/subtitles => apps}/extract-subs/package-lock.json (75%)
 create mode 100644 apps/extract-subs/package.json
 create mode 100644 apps/extract-subs/src/app.ts
 create mode 100644 apps/extract-subs/src/ffprobe.ts
 rename {devices/nos/modules/subtitles/extract-subs => apps/extract-subs/src}/lang-codes.ts (100%)
 create mode 100644 apps/extract-subs/tsconfig.json
 create mode 100644 apps/tsconfig.json
 delete mode 100644 devices/nos/modules/subtitles/extract-subs/default.nix
 delete mode 100755 devices/nos/modules/subtitles/extract-subs/main.ts
 delete mode 100644 devices/nos/modules/subtitles/extract-subs/package.json
 delete mode 100644 devices/nos/modules/subtitles/extract-subs/tsconfig.json

diff --git a/apps/default.nix b/apps/default.nix
index 62b603e5..17d8cb92 100644
--- a/apps/default.nix
+++ b/apps/default.nix
@@ -10,5 +10,6 @@
     type = "app";
   };
 in {
+  extract-subs = mkApp ./extract-subs;
   updateFlake = mkApp ./update;
 }
diff --git a/devices/nos/modules/subtitles/extract-subs/.envrc b/apps/extract-subs/.envrc
similarity index 81%
rename from devices/nos/modules/subtitles/extract-subs/.envrc
rename to apps/extract-subs/.envrc
index e74546be..ceec897a 100644
--- a/devices/nos/modules/subtitles/extract-subs/.envrc
+++ b/apps/extract-subs/.envrc
@@ -1 +1,2 @@
 use flake $FLAKE#subtitles-dev
+npm ci
diff --git a/apps/extract-subs/default.nix b/apps/extract-subs/default.nix
new file mode 100644
index 00000000..eabb774d
--- /dev/null
+++ b/apps/extract-subs/default.nix
@@ -0,0 +1,32 @@
+{
+  lib,
+  buildNpmPackage,
+  ffmpeg-full,
+  makeWrapper,
+  nodejs_latest,
+  ...
+}: let
+  inherit (lib) concatMapStringsSep getBin;
+
+  packageJSON = builtins.fromJSON (builtins.readFile ./package.json);
+in
+  buildNpmPackage rec {
+    pname = packageJSON.name;
+    inherit (packageJSON) version;
+
+    src = ./.;
+    npmDepsHash = "sha256-edIAvY03eA3hqPHjAXz8pq3M5NzekOAYAR4o7j/Wf5Y=";
+
+    runtimeInputs = [
+      ffmpeg-full
+    ];
+    nativeBuildInputs = [makeWrapper];
+
+    postInstall = ''
+      wrapProgram $out/bin/${pname} \
+          --prefix PATH : ${concatMapStringsSep ":" (p: getBin p) runtimeInputs}
+    '';
+
+    nodejs = nodejs_latest;
+    meta.mainProgram = pname;
+  }
diff --git a/devices/nos/modules/subtitles/extract-subs/eslint.config.ts b/apps/extract-subs/eslint.config.ts
similarity index 97%
rename from devices/nos/modules/subtitles/extract-subs/eslint.config.ts
rename to apps/extract-subs/eslint.config.ts
index 0a3eea06..48b1f19a 100644
--- a/devices/nos/modules/subtitles/extract-subs/eslint.config.ts
+++ b/apps/extract-subs/eslint.config.ts
@@ -30,6 +30,13 @@ export default tseslint.config({
         'class-methods-use-this': 'off',
         '@stylistic/no-multiple-empty-lines': 'off',
         '@stylistic/jsx-indent-props': 'off',
+        'no-use-before-define': 'off',
+        '@typescript-eslint/no-use-before-define': 'error',
+        '@stylistic/indent-binary-ops': 'off',
+        '@stylistic/max-statements-per-line': [
+            'error',
+            { max: 2 },
+        ],
 
         // Pre-flat config
         '@typescript-eslint/no-unused-vars': [
@@ -64,12 +71,6 @@ export default tseslint.config({
                 ],
             },
         ],
-        'no-use-before-define': [
-            'error',
-            {
-                functions: false,
-            },
-        ],
         'block-scoped-var': [
             'error',
         ],
@@ -255,6 +256,7 @@ export default tseslint.config({
         '@stylistic/brace-style': [
             'warn',
             'stroustrup',
+            { allowSingleLine: true },
         ],
         '@stylistic/comma-dangle': [
             'warn',
diff --git a/devices/nos/modules/subtitles/extract-subs/package-lock.json b/apps/extract-subs/package-lock.json
similarity index 75%
rename from devices/nos/modules/subtitles/extract-subs/package-lock.json
rename to apps/extract-subs/package-lock.json
index 06a022d53acf8f6171906ceadba46b3d035e35c1..91222e9fb86ed290424fa77f9a0bce7afdeac28c 100644
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diff --git a/apps/extract-subs/package.json b/apps/extract-subs/package.json
new file mode 100644
index 00000000..5369632c
--- /dev/null
+++ b/apps/extract-subs/package.json
@@ -0,0 +1,22 @@
+{
+    "name": "extract-subs",
+    "version": "0.0.0",
+    "bin": "out/bin/app.cjs",
+    "type": "module",
+    "scripts": {
+        "build": "node_ver=$(node -v); esbuild src/app.ts --bundle --platform=node --target=\"node${node_ver:1:2}\" --outfile=out/bin/app.cjs"
+    },
+    "dependencies": {
+        "@eslint/js": "9.14.0",
+        "@stylistic/eslint-plugin": "2.10.1",
+        "@types/fluent-ffmpeg": "2.1.27",
+        "@types/node": "22.9.0",
+        "esbuild": "0.24.0",
+        "eslint": "9.14.0",
+        "eslint-plugin-jsdoc": "50.5.0",
+        "fluent-ffmpeg": "2.1.3",
+        "jiti": "2.4.0",
+        "typescript": "5.6.3",
+        "typescript-eslint": "8.14.0"
+    }
+}
diff --git a/apps/extract-subs/src/app.ts b/apps/extract-subs/src/app.ts
new file mode 100644
index 00000000..21b7a716
--- /dev/null
+++ b/apps/extract-subs/src/app.ts
@@ -0,0 +1,157 @@
+import { spawnSync as spawn } from 'child_process';
+
+import ffprobe from './ffprobe';
+import { ISO6393To1 } from './lang-codes';
+
+/* Types */
+import { FfprobeStream } from 'fluent-ffmpeg';
+
+
+const SPAWN_OPTS = {
+    stdio: [process.stdin, process.stdout, process.stderr],
+};
+
+
+/**
+ * These are the cli arguments
+ *
+ * @param videoPath the directory in which we want to sync the subtitles
+ * @param languages a comma-separated list of languages (3 letters) to sync the subtitles
+ */
+const video = process.argv[2];
+const languages = process.argv[3]?.split(',');
+
+
+// Global Vars
+const subIndexes: number[] = [];
+let videoPath: string;
+let baseName: string;
+
+
+/**
+ * Gets the relative path to the subtitle file of a ffmpeg stream.
+ *
+ * @param sub the stream of the subtitles to extract
+ * @returns the path of the subtitle file
+ */
+const getSubPath = (sub: FfprobeStream): string => {
+    const language = ISO6393To1.get(sub.tags.language);
+
+    const forced = sub.disposition?.forced === 0 ?
+        '' :
+        '.forced';
+
+    const hearingImpaired = sub.disposition?.hearing_impaired === 0 ?
+        '' :
+        '.sdh';
+
+    return `${baseName}${forced}.${language}${hearingImpaired}.srt`;
+};
+
+/**
+ * Removes all subtitles streams from the video file.
+ */
+const removeContainerSubs = (): void => {
+    spawn('mv', [
+        videoPath,
+        `${videoPath}.bak`,
+    ], SPAWN_OPTS);
+
+    spawn('ffmpeg', [
+        '-i', `${videoPath}.bak`,
+        '-map', '0',
+        ...subIndexes.map((i) => ['-map', `-0:${i}`]).flat(),
+        '-c', 'copy', videoPath,
+    ], SPAWN_OPTS);
+
+    spawn('rm', [
+        `${videoPath}.bak`,
+    ], SPAWN_OPTS);
+};
+
+/**
+ * Extracts a sub of a video file to a subtitle file.
+ *
+ * @param sub the stream of the subtitles to extract
+ */
+const extractSub = (sub: FfprobeStream): void => {
+    const subFile = getSubPath(sub);
+
+    spawn('ffmpeg', [
+        '-i', videoPath,
+        '-map', `0:${sub.index}`, subFile,
+    ], SPAWN_OPTS);
+
+    subIndexes.push(sub.index);
+};
+
+/**
+ * Sorts the list of streams to only keep subtitles
+ * that can be extracted.
+ *
+ * @param lang    the language of the subtitles
+ * @param streams the streams
+ * @returns the streams that represent subtitles
+ */
+const findSubs = (
+    lang: string,
+    streams: FfprobeStream[],
+): FfprobeStream[] => {
+    const subs = streams.filter((s) => s.tags?.language &&
+        s.tags.language === lang &&
+        s.codec_type === 'subtitle');
+
+    const pgs = subs.filter((s) => s.codec_name === 'hdmv_pgs_subtitle');
+
+    // If we only have PGS subs, warn user
+    if (pgs.length === subs.length) {
+        console.warn(`No SRT subtitle tracks were found for ${lang}`);
+    }
+
+    // Remove PGS streams from subs
+    return subs.filter((s) => s.codec_name !== 'hdmv_pgs_subtitle');
+};
+
+/**
+ * Where the magic happens.
+ */
+const main = async(): Promise<void> => {
+    // Get rid of video extension
+    baseName = videoPath.split('/').at(-1)!.replace(/\.[^.]*$/, '');
+
+    // ffprobe the video file to see available sub tracks
+    const data = await ffprobe(videoPath);
+
+    if (!data?.streams) {
+        console.error('Couldn\'t find streams in video file');
+
+        return;
+    }
+
+    // Check for languages wanted
+    languages.forEach((lang) => {
+        const subs = findSubs(lang, data.streams);
+
+        if (subs.length === 0) {
+            console.warn(`No subtitle tracks were found for ${lang}`);
+
+            return;
+        }
+
+        // Extract all subs
+        subs.forEach((sub) => { extractSub(sub); });
+    });
+
+    removeContainerSubs();
+};
+
+
+// Check if there are 2 params
+if (video && languages) {
+    videoPath = video;
+    main();
+}
+else {
+    console.error('Error: no argument passed');
+    process.exit(1);
+}
diff --git a/apps/extract-subs/src/ffprobe.ts b/apps/extract-subs/src/ffprobe.ts
new file mode 100644
index 00000000..efdc4df8
--- /dev/null
+++ b/apps/extract-subs/src/ffprobe.ts
@@ -0,0 +1,8 @@
+import Ffmpeg from 'fluent-ffmpeg';
+
+
+export default (videoPath: string) => new Promise<Ffmpeg.FfprobeData>((resolve) => {
+    Ffmpeg.ffprobe(videoPath, (_e, data) => {
+        resolve(data);
+    });
+});
diff --git a/devices/nos/modules/subtitles/extract-subs/lang-codes.ts b/apps/extract-subs/src/lang-codes.ts
similarity index 100%
rename from devices/nos/modules/subtitles/extract-subs/lang-codes.ts
rename to apps/extract-subs/src/lang-codes.ts
diff --git a/apps/extract-subs/tsconfig.json b/apps/extract-subs/tsconfig.json
new file mode 100644
index 00000000..2c06e799
--- /dev/null
+++ b/apps/extract-subs/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "../tsconfig.json",
+  "includes": [
+    "*.ts",
+    "**/*.ts",
+    "*.js",
+    "**/*.js"
+  ]
+}
diff --git a/apps/tsconfig.json b/apps/tsconfig.json
new file mode 100644
index 00000000..e1cb9ba7
--- /dev/null
+++ b/apps/tsconfig.json
@@ -0,0 +1,25 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "compilerOptions": {
+    // Env
+    "target": "ESNext",
+    "lib": [
+      "ESNext"
+    ],
+    // Module
+    "module": "nodenext",
+    "moduleResolution": "bundler",
+    "baseUrl": ".",
+    // Emit
+    "noEmit": true,
+    "newLine": "LF",
+    // Interop
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "forceConsistentCasingInFileNames": true,
+    "isolatedModules": true,
+    // Type Checking
+    "strict": true,
+    "noImplicitAny": false
+  }
+}
diff --git a/apps/update/.envrc b/apps/update/.envrc
index c79171c6..fd3dddda 100644
--- a/apps/update/.envrc
+++ b/apps/update/.envrc
@@ -1 +1,2 @@
 use flake $FLAKE#node
+npm ci
diff --git a/apps/update/src/app.ts b/apps/update/src/app.ts
index 00e15031..24b6d179 100644
--- a/apps/update/src/app.ts
+++ b/apps/update/src/app.ts
@@ -1,12 +1,12 @@
 import { spawnSync } from 'node:child_process';
 import { writeFileSync } from 'node:fs';
 
-import { parseArgs } from './lib.ts';
+import { parseArgs } from './lib';
 
-import { updateDocker } from './docker.ts';
-import { updateFirefoxAddons } from '././firefox.ts';
-import { updateFlakeInputs } from './flake.ts';
-import { updateCustomPackage, updateVuetorrent } from './misc.ts';
+import { updateDocker } from './docker';
+import { updateFirefoxAddons } from '././firefox';
+import { updateFlakeInputs } from './flake';
+import { updateCustomPackage, updateVuetorrent } from './misc';
 
 
 /* Constants */
diff --git a/apps/update/src/misc.ts b/apps/update/src/misc.ts
index 5b96c42d..9dbc501b 100644
--- a/apps/update/src/misc.ts
+++ b/apps/update/src/misc.ts
@@ -1,7 +1,7 @@
 import { writeFileSync } from 'node:fs';
 import { spawnSync } from 'node:child_process';
 
-import { parseFetchurl } from './lib.ts';
+import { parseFetchurl } from './lib';
 
 
 /* Constants */
diff --git a/apps/update/tsconfig.json b/apps/update/tsconfig.json
index 8d125129..2c06e799 100644
--- a/apps/update/tsconfig.json
+++ b/apps/update/tsconfig.json
@@ -1,27 +1,6 @@
 {
-  "compilerOptions": {
-    // Env
-    "target": "ESNext",
-    "lib": ["ESNext"],
-    // Module
-    "module": "nodenext",
-    "moduleResolution": "nodenext",
-    "allowImportingTsExtensions": true,
-    "baseUrl": ".",
-    // Emit
-    "noEmit": true,
-    "newLine": "LF",
-    // Interop
-    "esModuleInterop": true,
-    "allowSyntheticDefaultImports": true,
-    "forceConsistentCasingInFileNames": true,
-    "isolatedModules": true,
-    // Type Checking
-    "strict": true,
-    "noImplicitAny": false,
-    "allowJs": true,
-    "checkJs": true
-  },
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "../tsconfig.json",
   "includes": [
     "*.ts",
     "**/*.ts",
diff --git a/devices/nos/modules/subtitles/extract-subs/default.nix b/devices/nos/modules/subtitles/extract-subs/default.nix
deleted file mode 100644
index ba5abdf3..00000000
--- a/devices/nos/modules/subtitles/extract-subs/default.nix
+++ /dev/null
@@ -1,49 +0,0 @@
-{
-  buildNpmPackage,
-  ffmpeg-full,
-  nodejs_20,
-  typescript,
-  writeShellApplication,
-  ...
-}: let
-  pname = "extract-subs";
-
-  extract-subs = buildNpmPackage {
-    name = "${pname}-npm";
-    src = ./.;
-    npmDepsHash = "sha256-WXkg4e5Nh3+haCbm+XJ1CB7rsA2uV/7eZUaOUl/NVk0=";
-
-    nativeBuildInputs = [
-      nodejs_20
-      typescript
-    ];
-
-    buildPhase = ''
-      tsc -p tsconfig.json
-    '';
-
-    installPhase = ''
-      mkdir -p $out/bin
-      mv node_modules package.json $out
-
-      echo '#!/usr/bin/env node' > $out/bin/${pname}
-      cat ./build/main.js >> $out/bin/${pname}
-      rm ./build/main.js
-      chmod +x $out/bin/${pname}
-
-      mv ./build/**.js $out/bin
-    '';
-  };
-in
-  writeShellApplication {
-    name = pname;
-
-    runtimeInputs = [
-      ffmpeg-full
-      extract-subs
-    ];
-
-    text = ''
-      exec ${pname} "$@"
-    '';
-  }
diff --git a/devices/nos/modules/subtitles/extract-subs/main.ts b/devices/nos/modules/subtitles/extract-subs/main.ts
deleted file mode 100755
index 3467fd98..00000000
--- a/devices/nos/modules/subtitles/extract-subs/main.ts
+++ /dev/null
@@ -1,114 +0,0 @@
-import Ffmpeg from 'fluent-ffmpeg';
-import { spawnSync as spawn } from 'child_process';
-
-import { ISO6393To1 } from './lang-codes';
-
-
-const SPAWN_OPTS = {
-    shell: true,
-    stdio: [process.stdin, process.stdout, process.stderr],
-};
-
-/**
- * These are the cli arguments
- *
- * @param videoPath the directory in which we want to sync the subtitles
- * @param languages a comma-separated list of languages (3 letters) to sync the subtitles
- */
-const video = process.argv[2];
-const languages = process.argv[3]?.split(',');
-
-
-const getSubPath = (baseName: string, sub: Ffmpeg.FfprobeStream): string => {
-    const language = ISO6393To1.get(sub.tags.language);
-
-    const forced = sub.disposition?.forced === 0 ?
-        '' :
-        '.forced';
-
-    const hearingImpaired = sub.disposition?.hearing_impaired === 0 ?
-        '' :
-        '.sdh';
-
-    return `${baseName}${forced}.${language}${hearingImpaired}.srt`;
-};
-
-const main = (videoPath: string) => {
-    const subIndexes: number[] = [];
-    const baseName = videoPath.split('/').at(-1)!.replace(/\.[^.]*$/, '');
-
-    // ffprobe the video file to see available sub tracks
-    Ffmpeg.ffprobe(videoPath, (_e, data) => {
-        if (!data?.streams) {
-            console.error('Couldn\'t find streams in video file');
-
-            return;
-        }
-
-        languages.forEach((lang) => {
-            let subs = data.streams.filter((s) => {
-                return s['tags'] &&
-                  s['tags']['language'] &&
-                  s['tags']['language'] === lang &&
-                  s.codec_type === 'subtitle';
-            });
-
-            const pgs = subs.filter((s) => s.codec_name === 'hdmv_pgs_subtitle');
-
-            // If we only have PGS subs, warn user
-            if (pgs.length === subs.length) {
-                console.warn(`No SRT subtitle tracks were found for ${lang}`);
-            }
-            // Remove PGS streams from subs
-            subs = subs.filter((s) => s.codec_name !== 'hdmv_pgs_subtitle');
-
-            if (subs.length === 0) {
-                console.warn(`No subtitle tracks were found for ${lang}`);
-
-                return;
-            }
-
-            subs.forEach((sub) => {
-                const subFile = getSubPath(baseName, sub);
-
-                // Extract subtitle
-                spawn('ffmpeg', [
-                    '-i', `'${videoPath}'`,
-                    '-map', `"0:${sub.index}"`, `'${subFile}'`,
-                ], SPAWN_OPTS);
-
-                subIndexes.push(sub.index);
-            });
-        });
-
-        // Delete subtitles from video
-        spawn('mv', [
-            `'${videoPath}'`,
-            `'${videoPath}.bak'`,
-        ], SPAWN_OPTS);
-
-        spawn('ffmpeg', [
-            '-i', `'${videoPath}.bak'`,
-            '-map', '0',
-            ...subIndexes.map((i) => [
-                '-map', `-0:${i}`,
-            ]).flat(),
-            '-c', 'copy', `'${videoPath}'`,
-        ], SPAWN_OPTS);
-
-        spawn('rm', [
-            `'${videoPath}.bak'`,
-        ], SPAWN_OPTS);
-    });
-};
-
-const escapePath = (p: string): string => p.replaceAll("'", "'\\''");
-
-// Check if there are 2 params
-if (video && languages) {
-    main(escapePath(video));
-}
-else {
-    console.error('Error: no argument passed');
-    process.exit(1);
-}
diff --git a/devices/nos/modules/subtitles/extract-subs/package.json b/devices/nos/modules/subtitles/extract-subs/package.json
deleted file mode 100644
index 365d7343..00000000
--- a/devices/nos/modules/subtitles/extract-subs/package.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-    "devDependencies": {
-        "@eslint/js": "9.12.0",
-        "@stylistic/eslint-plugin": "2.9.0",
-        "@types/eslint__js": "8.42.3",
-        "@types/node": "22.7.5",
-        "eslint": "9.12.0",
-        "eslint-plugin-jsdoc": "50.3.2",
-        "fzf": "0.5.2",
-        "jiti": "2.3.3",
-        "typescript": "5.6.3",
-        "typescript-eslint": "8.8.1"
-    },
-    "dependencies": {
-        "@types/fluent-ffmpeg": "2.1.27",
-        "fluent-ffmpeg": "2.1.3"
-    }
-}
diff --git a/devices/nos/modules/subtitles/extract-subs/tsconfig.json b/devices/nos/modules/subtitles/extract-subs/tsconfig.json
deleted file mode 100644
index 41c8a16d..00000000
--- a/devices/nos/modules/subtitles/extract-subs/tsconfig.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "ESNEXT",
-    "module": "commonjs",
-    "lib": [
-      "ES2022"
-    ],
-    "outDir": "build",
-    "strict": true,
-    "moduleResolution": "node",
-    "baseUrl": ".",
-    "types": [
-      "@types/fluent-ffmpeg"
-    ],
-    "skipLibCheck": true,
-    "forceConsistentCasingInFileNames": true,
-    "esModuleInterop": true
-  }
-}