Repo created

_scripts/getShakaLocales.js

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+const { readFileSync, readdirSync } = require('fs')
+
+function getPreloadedLocales() {
+  const localesFile = readFileSync(`${__dirname}/../node_modules/shaka-player/dist/locales.js`, 'utf-8')
+
+  const localesLine = localesFile.match(/^\/\/ LOCALES: ([\w ,-]+)$/m)
+
+  if (!localesLine) {
+    throw new Error("Failed to parse shaka-player's preloaded locales")
+  }
+
+  return localesLine[1].split(',').map(locale => locale.trim())
+}
+
+function getAllLocales() {
+  const filenames = readdirSync(`${__dirname}/../node_modules/shaka-player/ui/locales`)
+
+  return new Set(filenames
+    .filter(filename => filename !== 'source.json' && filename.endsWith('.json'))
+    .map(filename => filename.replace('.json', '')))
+}
+
+/**
+ * Maps the shaka locales to FreeTube's active ones
+ * This allows us to know which locale files are actually needed
+ * and which shaka locale needs to be activated for a given FreeTube one.
+ * @param {Set<string>} shakaLocales
+ * @param {string[]} freeTubeLocales
+ */
+function getMappings(shakaLocales, freeTubeLocales) {
+  /**
+   * @type {[string, string][]}
+   * Using this structure as it gets passed to `new Map()` in the player component
+   * The first element is the FreeTube locale, the second one is the shaka-player one
+   */
+  const mappings = []
+
+  for (const locale of freeTubeLocales) {
+    if (shakaLocales.has(locale)) {
+      mappings.push([
+        locale,
+        locale
+      ])
+    } else if (shakaLocales.has(locale.split('-')[0])) {
+      mappings.push([
+        locale,
+        locale.split('-')[0]
+      ])
+    }
+  }
+
+  // special cases
+
+  mappings.push(
+    // according to https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
+    // "no" is the macro language for "nb" and "nn"
+    [
+      'nb-NO',
+      'no'
+    ],
+    [
+      'nn',
+      'no'
+    ],
+
+    // according to https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
+    // "iw" is the old/original code for Hebrew, these days it's "he"
+    [
+      'he',
+      'iw'
+    ],
+
+    // not sure why we have pt, pt-PT and pt-BR in the FreeTube locales
+    // as pt and pt-PT are the same thing, but we should handle it here anyway
+    [
+      'pt',
+      'pt-PT'
+    ]
+  )
+
+  return mappings
+}
+
+function getShakaLocales() {
+  const shakaLocales = getAllLocales()
+
+  /** @type {string[]} */
+  const freeTubeLocales = JSON.parse(readFileSync(`${__dirname}/../static/locales/activeLocales.json`, 'utf-8'))
+
+  const mappings = getMappings(shakaLocales, freeTubeLocales)
+
+  const preloaded = getPreloadedLocales()
+
+  const shakaMappings = mappings.map(mapping => mapping[1])
+
+  // use a set to deduplicate the list
+  // we don't need to bundle any locale files that are already embedded in shaka-player/preloaded
+
+  /** @type {string[]} */
+  const toBeBundled = [...new Set(shakaMappings.filter(locale => !preloaded.includes(locale)))]
+
+  return {
+    SHAKA_LOCALE_MAPPINGS: mappings,
+    SHAKA_LOCALES_PREBUNDLED: preloaded,
+    SHAKA_LOCALES_TO_BE_BUNDLED: toBeBundled
+  }
+}
+
+module.exports = getShakaLocales()