1 files changed, 180 insertions, 0 deletions
diff --git a/ext/bg/js/ankiweb.js b/ext/bg/js/ankiweb.js
new file mode 100644
index 00000000..69a1b44d
--- /dev/null
+++ b/ext/bg/js/ankiweb.js
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2016  Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+class AnkiWeb {
+    constructor(username, password) {
+        this.username = username;
+        this.password = password;
+        this.noteInfo = null;
+
+        chrome.webRequest.onBeforeSendHeaders.addListener(
+            details => {
+                details.requestHeaders.push({name: 'Origin', value: 'https://ankiweb.net'});
+                return {requestHeaders: details.requestHeaders};
+            },
+            {urls: ['https://ankiweb.net/*']},
+            ['blocking', 'requestHeaders']
+        );
+    }
+
+    addNote(note) {
+        return this.retrieve().then(info => {
+            const model = info.models.find(m => m.name === note.modelName);
+            if (!model) {
+                return Promise.reject('cannot add note model provided');
+            }
+
+            const fields = [];
+            for (const field of model.fields) {
+                fields.push(note.fields[field]);
+            }
+
+            const data = {
+                data: JSON.stringify([fields, note.tags.join(' ')]),
+                mid: model.id,
+                deck: note.deckName,
+                csrf_token: info.token
+            };
+
+            return AnkiWeb.loadAccountPage('https://ankiweb.net/edit/save', data, this.username, this.password);
+        }).then(response => response !== '0');
+    }
+
+    canAddNotes(notes) {
+        return Promise.resolve(new Array(notes.length).fill(true));
+    }
+
+    getDeckNames() {
+        return this.retrieve().then(info => info.deckNames);
+    }
+
+    getModelNames() {
+        return this.retrieve().then(info => info.models.map(m => m.name));
+    }
+
+    getModelFieldNames(modelName) {
+        return this.retrieve().then(info => {
+            const model = info.models.find(m => m.name === modelName);
+            return model ? model.fields : [];
+        });
+    }
+
+    retrieve() {
+        if (this.noteInfo !== null) {
+            return Promise.resolve(this.noteInfo);
+        }
+
+        return AnkiWeb.scrape(this.username, this.password).then(({deckNames, models, token}) => {
+            this.noteInfo = {deckNames, models, token};
+            return this.noteInfo;
+        });
+    }
+
+    logout() {
+        return AnkiWeb.loadPage('https://ankiweb.net/account/logout', null);
+    }
+
+    static scrape(username, password) {
+        return AnkiWeb.loadAccountPage('https://ankiweb.net/edit/', null, username, password).then(response => {
+            const modelsMatch = /editor\.models = (.*}]);/.exec(response);
+            if (modelsMatch === null) {
+                return Promise.reject('failed to scrape model data');
+            }
+
+            const decksMatch = /editor\.decks = (.*}});/.exec(response);
+            if (decksMatch === null) {
+                return Promise.reject('failed to scrape deck data');
+            }
+
+            const tokenMatch = /editor\.csrf_token = \'(.*)\';/.exec(response);
+            if (tokenMatch === null) {
+                return Promise.reject('failed to acquire csrf_token');
+            }
+
+            const modelsJson = JSON.parse(modelsMatch[1]);
+            const decksJson = JSON.parse(decksMatch[1]);
+            const token = tokenMatch[1];
+
+            const deckNames = Object.keys(decksJson).map(d => decksJson[d].name);
+            const models = [];
+            for (const modelJson of modelsJson) {
+                models.push({
+                    name: modelJson.name,
+                    id: modelJson.id,
+                    fields: modelJson.flds.map(f => f.name)
+                });
+            }
+
+            return {deckNames, models, token};
+        });
+    }
+
+    static login(username, password, token) {
+        if (username.length === 0 || password.length === 0) {
+            return Promise.reject('login credentials not specified');
+        }
+
+        const data = {username, password, csrf_token: token, submitted: 1};
+        return AnkiWeb.loadPage('https://ankiweb.net/account/login', data).then(response => {
+            if (!response.includes('class="mitem"')) {
+                return Promise.reject('failed to authenticate');
+            }
+        });
+    }
+
+    static loadAccountPage(url, data, username, password) {
+        return AnkiWeb.loadPage(url, data).then(response => {
+            if (response.includes('name="password"')) {
+                const tokenMatch = /name="csrf_token" value="(.*)"/.exec(response);
+                if (tokenMatch === null) {
+                    return Promise.reject('failed to acquire csrf_token');
+                }
+
+                return AnkiWeb.login(username, password, tokenMatch[1]).then(() => AnkiWeb.loadPage(url, data));
+            } else {
+                return response;
+            }
+        });
+    }
+
+    static loadPage(url, data) {
+        return new Promise((resolve, reject) => {
+            let dataEnc = null;
+            if (data) {
+                const params = [];
+                for (const key in data) {
+                    params.push(`${encodeURIComponent(key)}=${encodeURIComponent(data[key])}`);
+                }
+
+                dataEnc = params.join('&');
+            }
+
+            const xhr = new XMLHttpRequest();
+            xhr.addEventListener('error', () => reject('failed to execute network request'));
+            xhr.addEventListener('load', () => resolve(xhr.responseText));
+            if (dataEnc) {
+                xhr.open('POST', url);
+                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+                xhr.send(dataEnc);
+            } else {
+                xhr.open('GET', url);
+                xhr.send();
+            }
+        });
+    }
+}