Merge pull request #401 from toasted-nutbread/audio-refactor

Audio refactor

4 files changed, 111 insertions, 100 deletions

diff --git a/ext/bg/background.html b/ext/bg/background.html
index f6e00bf5..44abe8fd 100644
--- a/ext/bg/background.html
+++ b/ext/bg/background.html
@@ -24,7 +24,7 @@
         <script src="/bg/js/anki.js"></script>
         <script src="/bg/js/anki-note-builder.js"></script>
         <script src="/bg/js/mecab.js"></script>
-        <script src="/bg/js/audio.js"></script>
+        <script src="/bg/js/audio-uri-builder.js"></script>
         <script src="/bg/js/backend-api-forwarder.js"></script>
         <script src="/bg/js/clipboard-monitor.js"></script>
         <script src="/bg/js/conditions.js"></script>
diff --git a/ext/bg/js/audio.js b/ext/bg/js/audio-uri-builder.js
index c94121ae..15cea995 100644
--- a/ext/bg/js/audio.js
+++ b/ext/bg/js/audio-uri-builder.js
@@ -18,8 +18,49 @@
 
 /*global jpIsStringEntirelyKana*/
 
-const audioUrlBuilders = new Map([
-    ['jpod101', async (definition) => {
+class AudioUriBuilder {
+    constructor() {
+        this._getUrlHandlers = new Map([
+            ['jpod101', this._getUriJpod101.bind(this)],
+            ['jpod101-alternate', this._getUriJpod101Alternate.bind(this)],
+            ['jisho', this._getUriJisho.bind(this)],
+            ['text-to-speech', this._getUriTextToSpeech.bind(this)],
+            ['text-to-speech-reading', this._getUriTextToSpeechReading.bind(this)],
+            ['custom', this._getUriCustom.bind(this)]
+        ]);
+    }
+
+    normalizeUrl(url, baseUrl, basePath) {
+        if (url) {
+            if (url[0] === '/') {
+                if (url.length >= 2 && url[1] === '/') {
+                    // Begins with "//"
+                    url = baseUrl.substring(0, baseUrl.indexOf(':') + 1) + url;
+                } else {
+                    // Begins with "/"
+                    url = baseUrl + url;
+                }
+            } else if (!/^[a-z][a-z0-9\-+.]*:/i.test(url)) {
+                // No URI scheme => relative path
+                url = baseUrl + basePath + url;
+            }
+        }
+        return url;
+    }
+
+    async getUri(definition, source, options) {
+        const handler = this._getUrlHandlers.get(source);
+        if (typeof handler === 'function') {
+            try {
+                return await handler(definition, options);
+            } catch (e) {
+                // NOP
+            }
+        }
+        return null;
+    }
+
+    async _getUriJpod101(definition) {
         let kana = definition.reading;
         let kanji = definition.expression;
 
@@ -37,8 +78,9 @@ const audioUrlBuilders = new Map([
         }
 
         return `https://assets.languagepod101.com/dictionary/japanese/audiomp3.php?${params.join('&')}`;
-    }],
-    ['jpod101-alternate', async (definition) => {
+    }
+
+    async _getUriJpod101Alternate(definition) {
         const response = await new Promise((resolve, reject) => {
             const xhr = new XMLHttpRequest();
             xhr.open('POST', 'https://www.japanesepod101.com/learningcenter/reference/dictionary_post');
@@ -54,7 +96,7 @@ const audioUrlBuilders = new Map([
                 const url = row.querySelector('audio>source[src]').getAttribute('src');
                 const reading = row.getElementsByClassName('dc-vocab_kana').item(0).textContent;
                 if (url && reading && (!definition.reading || definition.reading === reading)) {
-                    return audioUrlNormalize(url, 'https://www.japanesepod101.com', '/learningcenter/reference/');
+                    return this.normalizeUrl(url, 'https://www.japanesepod101.com', '/learningcenter/reference/');
                 }
             } catch (e) {
                 // NOP
@@ -62,8 +104,9 @@ const audioUrlBuilders = new Map([
         }
 
         throw new Error('Failed to find audio URL');
-    }],
-    ['jisho', async (definition) => {
+    }
+
+    async _getUriJisho(definition) {
         const response = await new Promise((resolve, reject) => {
             const xhr = new XMLHttpRequest();
             xhr.open('GET', `https://jisho.org/search/${definition.expression}`);
@@ -78,7 +121,7 @@ const audioUrlBuilders = new Map([
             if (audio !== null) {
                 const url = audio.getElementsByTagName('source').item(0).getAttribute('src');
                 if (url) {
-                    return audioUrlNormalize(url, 'https://jisho.org', '/search/');
+                    return this.normalizeUrl(url, 'https://jisho.org', '/search/');
                 }
             }
         } catch (e) {
@@ -86,99 +129,28 @@ const audioUrlBuilders = new Map([
         }
 
         throw new Error('Failed to find audio URL');
-    }],
-    ['text-to-speech', async (definition, options) => {
+    }
+
+    async _getUriTextToSpeech(definition, options) {
         const voiceURI = options.audio.textToSpeechVoice;
         if (!voiceURI) {
             throw new Error('No voice');
         }
 
         return `tts:?text=${encodeURIComponent(definition.expression)}&voice=${encodeURIComponent(voiceURI)}`;
-    }],
-    ['text-to-speech-reading', async (definition, options) => {
+    }
+
+    async _getUriTextToSpeechReading(definition, options) {
         const voiceURI = options.audio.textToSpeechVoice;
         if (!voiceURI) {
             throw new Error('No voice');
         }
 
         return `tts:?text=${encodeURIComponent(definition.reading || definition.expression)}&voice=${encodeURIComponent(voiceURI)}`;
-    }],
-    ['custom', async (definition, options) => {
-        const customSourceUrl = options.audio.customSourceUrl;
-        return customSourceUrl.replace(/\{([^}]*)\}/g, (m0, m1) => (hasOwn(definition, m1) ? `${definition[m1]}` : m0));
-    }]
-]);
-
-async function audioGetUrl(definition, mode, options, download) {
-    const handler = audioUrlBuilders.get(mode);
-    if (typeof handler === 'function') {
-        try {
-            return await handler(definition, options, download);
-        } catch (e) {
-            // NOP
-        }
     }
-    return null;
-}
 
-function audioUrlNormalize(url, baseUrl, basePath) {
-    if (url) {
-        if (url[0] === '/') {
-            if (url.length >= 2 && url[1] === '/') {
-                // Begins with "//"
-                url = baseUrl.substring(0, baseUrl.indexOf(':') + 1) + url;
-            } else {
-                // Begins with "/"
-                url = baseUrl + url;
-            }
-        } else if (!/^[a-z][a-z0-9\-+.]*:/i.test(url)) {
-            // No URI scheme => relative path
-            url = baseUrl + basePath + url;
-        }
-    }
-    return url;
-}
-
-function audioBuildFilename(definition) {
-    if (definition.reading || definition.expression) {
-        let filename = 'yomichan';
-        if (definition.reading) {
-            filename += `_${definition.reading}`;
-        }
-        if (definition.expression) {
-            filename += `_${definition.expression}`;
-        }
-
-        return filename += '.mp3';
-    }
-    return null;
-}
-
-async function audioInject(definition, fields, sources, optionsContext, audioSystem) {
-    let usesAudio = false;
-    for (const fieldValue of Object.values(fields)) {
-        if (fieldValue.includes('{audio}')) {
-            usesAudio = true;
-            break;
-        }
-    }
-
-    if (!usesAudio) {
-        return true;
-    }
-
-    try {
-        const expressions = definition.expressions;
-        const audioSourceDefinition = Array.isArray(expressions) ? expressions[0] : definition;
-
-        const {uri} = await audioSystem.getDefinitionAudio(audioSourceDefinition, sources, {tts: false, optionsContext});
-        const filename = audioBuildFilename(audioSourceDefinition);
-        if (filename !== null) {
-            definition.audio = {url: uri, filename};
-        }
-
-        return true;
-    } catch (e) {
-        return false;
+    async _getUriCustom(definition, options) {
+        const customSourceUrl = options.audio.customSourceUrl;
+        return customSourceUrl.replace(/\{([^}]*)\}/g, (m0, m1) => (hasOwn(definition, m1) ? `${definition[m1]}` : m0));
     }
 }
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index d0d53a36..349fb4eb 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -21,9 +21,8 @@ conditionsTestValue, profileConditionsDescriptor
 handlebarsRenderDynamic
 requestText, requestJson, optionsLoad
 dictConfigured, dictTermsSort, dictEnabledSet
-audioGetUrl, audioInject
 jpConvertReading, jpDistributeFuriganaInflected, jpKatakanaToHiragana
-AnkiNoteBuilder, AudioSystem, Translator, AnkiConnect, AnkiNull, Mecab, BackendApiForwarder, JsonSchema, ClipboardMonitor*/
+AnkiNoteBuilder, AudioSystem, AudioUriBuilder, Translator, AnkiConnect, AnkiNull, Mecab, BackendApiForwarder, JsonSchema, ClipboardMonitor*/
 
 class Backend {
     constructor() {
@@ -36,6 +35,7 @@ class Backend {
         this.optionsSchema = null;
         this.defaultAnkiFieldTemplates = null;
         this.audioSystem = new AudioSystem({getAudioUri: this._getAudioUri.bind(this)});
+        this.audioUriBuilder = new AudioUriBuilder();
         this.optionsContext = {
             depth: 0,
             url: window.location.href
@@ -67,7 +67,7 @@ class Backend {
             ['noteView', this._onApiNoteView.bind(this)],
             ['templateRender', this._onApiTemplateRender.bind(this)],
             ['commandExec', this._onApiCommandExec.bind(this)],
-            ['audioGetUrl', this._onApiAudioGetUrl.bind(this)],
+            ['audioGetUri', this._onApiAudioGetUri.bind(this)],
             ['screenshotGet', this._onApiScreenshotGet.bind(this)],
             ['forward', this._onApiForward.bind(this)],
             ['frameInformationGet', this._onApiFrameInformationGet.bind(this)],
@@ -434,12 +434,11 @@ class Backend {
         const templates = this.defaultAnkiFieldTemplates;
 
         if (mode !== 'kanji') {
-            await audioInject(
+            await this._audioInject(
                 definition,
                 options.anki.terms.fields,
                 options.audio.sources,
-                optionsContext,
-                this.audioSystem
+                optionsContext
             );
         }
 
@@ -514,9 +513,9 @@ class Backend {
         return this._runCommand(command, params);
     }
 
-    async _onApiAudioGetUrl({definition, source, optionsContext}) {
+    async _onApiAudioGetUri({definition, source, optionsContext}) {
         const options = this.getOptions(optionsContext);
-        return await audioGetUrl(definition, source, options);
+        return await this.audioUriBuilder.getUri(definition, source, options);
     }
 
     _onApiScreenshotGet({options}, sender) {
@@ -772,7 +771,36 @@ class Backend {
         }
 
         const options = this.getOptions(optionsContext);
-        return await audioGetUrl(definition, source, options);
+        return await this.audioUriBuilder.getUri(definition, source, options);
+    }
+
+    async _audioInject(definition, fields, sources, optionsContext) {
+        let usesAudio = false;
+        for (const fieldValue of Object.values(fields)) {
+            if (fieldValue.includes('{audio}')) {
+                usesAudio = true;
+                break;
+            }
+        }
+
+        if (!usesAudio) {
+            return true;
+        }
+
+        try {
+            const expressions = definition.expressions;
+            const audioSourceDefinition = Array.isArray(expressions) ? expressions[0] : definition;
+
+            const {uri} = await this.audioSystem.getDefinitionAudio(audioSourceDefinition, sources, {tts: false, optionsContext});
+            const filename = this._createInjectedAudioFileName(audioSourceDefinition);
+            if (filename !== null) {
+                definition.audio = {url: uri, filename};
+            }
+
+            return true;
+        } catch (e) {
+            return false;
+        }
     }
 
     async _injectScreenshot(definition, fields, screenshot) {
@@ -815,6 +843,17 @@ class Backend {
         return handlebarsRenderDynamic(template, data);
     }
 
+    _createInjectedAudioFileName(definition) {
+        const {reading, expression} = definition;
+        if (!reading && !expression) { return null; }
+
+        let filename = 'yomichan';
+        if (reading) { filename += `_${reading}`; }
+        if (expression) { filename += `_${expression}`; }
+        filename += '.mp3';
+        return filename;
+    }
+
     static _getTabUrl(tab) {
         return new Promise((resolve) => {
             chrome.tabs.sendMessage(tab.id, {action: 'getUrl'}, {frameId: 0}, (response) => {
diff --git a/ext/bg/js/settings/audio.js b/ext/bg/js/settings/audio.js
index 6f581d9b..c825be6b 100644
--- a/ext/bg/js/settings/audio.js
+++ b/ext/bg/js/settings/audio.js
@@ -16,7 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-/*global getOptionsContext, getOptionsMutable, settingsSaveOptions, apiAudioGetUrl
+/*global getOptionsContext, getOptionsMutable, settingsSaveOptions, apiAudioGetUri
 AudioSystem, AudioSourceUI*/
 
 let audioSourceUI = null;
@@ -26,7 +26,7 @@ async function audioSettingsInitialize() {
     audioSystem = new AudioSystem({
         getAudioUri: async (definition, source) => {
             const optionsContext = getOptionsContext();
-            return await apiAudioGetUrl(definition, source, optionsContext);
+            return await apiAudioGetUri(definition, source, optionsContext);
         }
     });