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+/*
+ * Copyright (C) 2016-2022 Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * AnkiUtil
+ */
+
+class AnkiConnect {
+ constructor() {
+ this._enabled = false;
+ this._server = null;
+ this._localVersion = 2;
+ this._remoteVersion = 0;
+ this._versionCheckPromise = null;
+ }
+
+ get server() {
+ return this._server;
+ }
+
+ set server(value) {
+ this._server = value;
+ }
+
+ get enabled() {
+ return this._enabled;
+ }
+
+ set enabled(value) {
+ this._enabled = value;
+ }
+
+ async isConnected() {
+ try {
+ await this._invoke('version');
+ return true;
+ } catch (e) {
+ return false;
+ }
+ }
+
+ async getVersion() {
+ if (!this._enabled) { return null; }
+ await this._checkVersion();
+ return await this._invoke('version', {});
+ }
+
+ async addNote(note) {
+ if (!this._enabled) { return null; }
+ await this._checkVersion();
+ return await this._invoke('addNote', {note});
+ }
+
+ async canAddNotes(notes) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('canAddNotes', {notes});
+ }
+
+ async notesInfo(notes) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('notesInfo', {notes});
+ }
+
+ async getDeckNames() {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('deckNames');
+ }
+
+ async getModelNames() {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('modelNames');
+ }
+
+ async getModelFieldNames(modelName) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('modelFieldNames', {modelName});
+ }
+
+ async guiBrowse(query) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('guiBrowse', {query});
+ }
+
+ async guiBrowseNote(noteId) {
+ return await this.guiBrowse(`nid:${noteId}`);
+ }
+
+ /**
+ * Opens the note editor GUI.
+ * @param {number} noteId The ID of the note.
+ * @returns {Promise<null>} Nothing is returned.
+ */
+ async guiEditNote(noteId) {
+ return await this._invoke('guiEditNote', {note: noteId});
+ }
+
+ /**
+ * Stores a file with the specified base64-encoded content inside Anki's media folder.
+ * @param {string} fileName The name of the file.
+ * @param {string} content The base64-encoded content of the file.
+ * @returns {?string} The actual file name used to store the file, which may be different; or `null` if the file was not stored.
+ * @throws {Error} An error is thrown is this object is not enabled.
+ */
+ async storeMediaFile(fileName, content) {
+ if (!this._enabled) {
+ throw new Error('AnkiConnect not enabled');
+ }
+ await this._checkVersion();
+ return await this._invoke('storeMediaFile', {filename: fileName, data: content});
+ }
+
+ /**
+ * Finds notes matching a query.
+ * @param {string} query Searches for notes matching a query.
+ * @returns {number[]} An array of note IDs.
+ * @see https://docs.ankiweb.net/searching.html
+ */
+ async findNotes(query) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('findNotes', {query});
+ }
+
+ async findNoteIds(notes) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ const actions = notes.map((note) => {
+ let query = '';
+ switch (this._getDuplicateScopeFromNote(note)) {
+ case 'deck':
+ query = `"deck:${this._escapeQuery(note.deckName)}" `;
+ break;
+ case 'deck-root':
+ query = `"deck:${this._escapeQuery(AnkiUtil.getRootDeckName(note.deckName))}" `;
+ break;
+ }
+ query += this._fieldsToQuery(note.fields);
+ return {action: 'findNotes', params: {query}};
+ });
+ return await this._invoke('multi', {actions});
+ }
+
+ async suspendCards(cardIds) {
+ if (!this._enabled) { return false; }
+ await this._checkVersion();
+ return await this._invoke('suspend', {cards: cardIds});
+ }
+
+ async findCards(query) {
+ if (!this._enabled) { return []; }
+ await this._checkVersion();
+ return await this._invoke('findCards', {query});
+ }
+
+ async findCardsForNote(noteId) {
+ return await this.findCards(`nid:${noteId}`);
+ }
+
+ /**
+ * Gets information about the AnkiConnect APIs available.
+ * @param {string[]} scopes A list of scopes to get information about.
+ * @param {?string[]} actions A list of actions to check for
+ * @returns {object} Information about the APIs.
+ */
+ async apiReflect(scopes, actions=null) {
+ return await this._invoke('apiReflect', {scopes, actions});
+ }
+
+ /**
+ * Checks whether a specific API action exists.
+ * @param {string} action The action to check for.
+ * @returns {boolean} Whether or not the action exists.
+ */
+ async apiExists(action) {
+ const {actions} = await this.apiReflect(['actions'], [action]);
+ return actions.includes(action);
+ }
+
+ /**
+ * Checks if a specific error object corresponds to an unsupported action.
+ * @param {Error} error An error object generated by an API call.
+ * @returns {boolean} Whether or not the error indicates the action is not supported.
+ */
+ isErrorUnsupportedAction(error) {
+ if (error instanceof Error) {
+ const {data} = error;
+ if (isObject(data) && data.apiError === 'unsupported action') {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ // Private
+
+ async _checkVersion() {
+ if (this._remoteVersion < this._localVersion) {
+ if (this._versionCheckPromise === null) {
+ const promise = this._invoke('version');
+ promise
+ .catch(() => {})
+ .finally(() => { this._versionCheckPromise = null; });
+ this._versionCheckPromise = promise;
+ }
+ this._remoteVersion = await this._versionCheckPromise;
+ if (this._remoteVersion < this._localVersion) {
+ throw new Error('Extension and plugin versions incompatible');
+ }
+ }
+ }
+
+ async _invoke(action, params) {
+ let response;
+ try {
+ response = await fetch(this._server, {
+ method: 'POST',
+ mode: 'cors',
+ cache: 'default',
+ credentials: 'omit',
+ headers: {
+ 'Content-Type': 'application/json'
+ },
+ redirect: 'follow',
+ referrerPolicy: 'no-referrer',
+ body: JSON.stringify({action, params, version: this._localVersion})
+ });
+ } catch (e) {
+ const error = new Error('Anki connection failure');
+ error.data = {action, params, originalError: e};
+ throw error;
+ }
+
+ if (!response.ok) {
+ const error = new Error(`Anki connection error: ${response.status}`);
+ error.data = {action, params, status: response.status};
+ throw error;
+ }
+
+ let responseText = null;
+ let result;
+ try {
+ responseText = await response.text();
+ result = JSON.parse(responseText);
+ } catch (e) {
+ const error = new Error('Invalid Anki response');
+ error.data = {action, params, status: response.status, responseText, originalError: e};
+ throw error;
+ }
+
+ if (isObject(result)) {
+ const apiError = result.error;
+ if (typeof apiError !== 'undefined') {
+ const error = new Error(`Anki error: ${apiError}`);
+ error.data = {action, params, status: response.status, apiError};
+ throw error;
+ }
+ }
+
+ return result;
+ }
+
+ _escapeQuery(text) {
+ return text.replace(/"/g, '');
+ }
+
+ _fieldsToQuery(fields) {
+ const fieldNames = Object.keys(fields);
+ if (fieldNames.length === 0) {
+ return '';
+ }
+
+ const key = fieldNames[0];
+ return `"${key.toLowerCase()}:${this._escapeQuery(fields[key])}"`;
+ }
+
+ _getDuplicateScopeFromNote(note) {
+ const {options} = note;
+ if (typeof options === 'object' && options !== null) {
+ const {duplicateScope} = options;
+ if (typeof duplicateScope !== 'undefined') {
+ return duplicateScope;
+ }
+ }
+ return null;
+ }
+}