3 files changed, 354 insertions, 348 deletions

diff --git a/ext/bg/js/settings/anki-templates.js b/ext/bg/js/settings/anki-templates.js
index 0dadb433..dd128ab8 100644
--- a/ext/bg/js/settings/anki-templates.js
+++ b/ext/bg/js/settings/anki-templates.js
@@ -17,141 +17,147 @@
 
 /* global
  * AnkiNoteBuilder
- * ankiGetFieldMarkers
- * ankiGetFieldMarkersHtml
  * api
  * getOptionsContext
  * getOptionsMutable
  * settingsSaveOptions
  */
 
-function onAnkiFieldTemplatesReset(e) {
-    e.preventDefault();
-    $('#field-template-reset-modal').modal('show');
-}
-
-async function onAnkiFieldTemplatesResetConfirm(e) {
-    e.preventDefault();
+class AnkiTemplatesController {
+    constructor(ankiController) {
+        this._ankiController = ankiController;
+        this._cachedDefinitionValue = null;
+        this._cachedDefinitionText = null;
+    }
 
-    $('#field-template-reset-modal').modal('hide');
+    prepare() {
+        const markers = new Set([
+            ...this._ankiController.getFieldMarkers('terms'),
+            ...this._ankiController.getFieldMarkers('kanji')
+        ]);
+        const fragment = this._ankiController.getFieldMarkersHtml(markers);
+
+        const list = document.querySelector('#field-templates-list');
+        list.appendChild(fragment);
+        for (const node of list.querySelectorAll('.marker-link')) {
+            node.addEventListener('click', this._onMarkerClicked.bind(this), false);
+        }
 
-    const value = await api.getDefaultAnkiFieldTemplates();
+        $('#field-templates').on('change', this._onChanged.bind(this));
+        $('#field-template-render').on('click', this._onRender.bind(this));
+        $('#field-templates-reset').on('click', this._onReset.bind(this));
+        $('#field-templates-reset-confirm').on('click', this._onResetConfirm.bind(this));
 
-    const element = document.querySelector('#field-templates');
-    element.value = value;
-    element.dispatchEvent(new Event('change'));
-}
+        this.updateValue();
+    }
 
-function ankiTemplatesInitialize() {
-    const markers = new Set(ankiGetFieldMarkers('terms').concat(ankiGetFieldMarkers('kanji')));
-    const fragment = ankiGetFieldMarkersHtml(markers);
+    async updateValue() {
+        const optionsContext = getOptionsContext();
+        const options = await api.optionsGet(optionsContext);
+        let templates = options.anki.fieldTemplates;
+        if (typeof templates !== 'string') { templates = await api.getDefaultAnkiFieldTemplates(); }
+        $('#field-templates').val(templates);
 
-    const list = document.querySelector('#field-templates-list');
-    list.appendChild(fragment);
-    for (const node of list.querySelectorAll('.marker-link')) {
-        node.addEventListener('click', onAnkiTemplateMarkerClicked, false);
+        this._onValidateCompile();
     }
 
-    $('#field-templates').on('change', onAnkiFieldTemplatesChanged);
-    $('#field-template-render').on('click', onAnkiTemplateRender);
-    $('#field-templates-reset').on('click', onAnkiFieldTemplatesReset);
-    $('#field-templates-reset-confirm').on('click', onAnkiFieldTemplatesResetConfirm);
+    // Private
 
-    ankiTemplatesUpdateValue();
-}
+    _onReset(e) {
+        e.preventDefault();
+        $('#field-template-reset-modal').modal('show');
+    }
 
-async function ankiTemplatesUpdateValue() {
-    const optionsContext = getOptionsContext();
-    const options = await api.optionsGet(optionsContext);
-    let templates = options.anki.fieldTemplates;
-    if (typeof templates !== 'string') { templates = await api.getDefaultAnkiFieldTemplates(); }
-    $('#field-templates').val(templates);
+    async _onResetConfirm(e) {
+        e.preventDefault();
 
-    onAnkiTemplatesValidateCompile();
-}
+        $('#field-template-reset-modal').modal('hide');
 
-const ankiTemplatesValidateGetDefinition = (() => {
-    let cachedValue = null;
-    let cachedText = null;
+        const value = await api.getDefaultAnkiFieldTemplates();
 
-    return async (text, optionsContext) => {
-        if (cachedText !== text) {
-            const {definitions} = await api.termsFind(text, {}, optionsContext);
-            if (definitions.length === 0) { return null; }
+        const element = document.querySelector('#field-templates');
+        element.value = value;
+        element.dispatchEvent(new Event('change'));
+    }
 
-            cachedValue = definitions[0];
-            cachedText = text;
+    async _onChanged(e) {
+        // Get value
+        let templates = e.currentTarget.value;
+        if (templates === await api.getDefaultAnkiFieldTemplates()) {
+            // Default
+            templates = null;
         }
-        return cachedValue;
-    };
-})();
-
-async function ankiTemplatesValidate(infoNode, field, mode, showSuccessResult, invalidateInput) {
-    const text = document.querySelector('#field-templates-preview-text').value || '';
-    const exceptions = [];
-    let result = `No definition found for ${text}`;
-    try {
+
+        // Overwrite
         const optionsContext = getOptionsContext();
-        const definition = await ankiTemplatesValidateGetDefinition(text, optionsContext);
-        if (definition !== null) {
-            const options = await api.optionsGet(optionsContext);
-            const context = {
-                document: {
-                    title: document.title
-                }
-            };
-            let templates = options.anki.fieldTemplates;
-            if (typeof templates !== 'string') { templates = await api.getDefaultAnkiFieldTemplates(); }
-            const ankiNoteBuilder = new AnkiNoteBuilder({renderTemplate: api.templateRender.bind(api)});
-            result = await ankiNoteBuilder.formatField(field, definition, mode, context, options, templates, exceptions);
-        }
-    } catch (e) {
-        exceptions.push(e);
+        const options = await getOptionsMutable(optionsContext);
+        options.anki.fieldTemplates = templates;
+        await settingsSaveOptions();
+
+        // Compile
+        this._onValidateCompile();
     }
 
-    const hasException = exceptions.length > 0;
-    infoNode.hidden = !(showSuccessResult || hasException);
-    infoNode.textContent = hasException ? exceptions.map((e) => `${e}`).join('\n') : (showSuccessResult ? result : '');
-    infoNode.classList.toggle('text-danger', hasException);
-    if (invalidateInput) {
-        const input = document.querySelector('#field-templates');
-        input.classList.toggle('is-invalid', hasException);
+    _onValidateCompile() {
+        const infoNode = document.querySelector('#field-template-compile-result');
+        this._validate(infoNode, '{expression}', 'term-kanji', false, true);
     }
-}
 
-async function onAnkiFieldTemplatesChanged(e) {
-    // Get value
-    let templates = e.currentTarget.value;
-    if (templates === await api.getDefaultAnkiFieldTemplates()) {
-        // Default
-        templates = null;
+    _onMarkerClicked(e) {
+        e.preventDefault();
+        document.querySelector('#field-template-render-text').value = `{${e.target.textContent}}`;
     }
 
-    // Overwrite
-    const optionsContext = getOptionsContext();
-    const options = await getOptionsMutable(optionsContext);
-    options.anki.fieldTemplates = templates;
-    await settingsSaveOptions();
+    _onRender(e) {
+        e.preventDefault();
 
-    // Compile
-    onAnkiTemplatesValidateCompile();
-}
+        const field = document.querySelector('#field-template-render-text').value;
+        const infoNode = document.querySelector('#field-template-render-result');
+        infoNode.hidden = true;
+        this._validate(infoNode, field, 'term-kanji', true, false);
+    }
 
-function onAnkiTemplatesValidateCompile() {
-    const infoNode = document.querySelector('#field-template-compile-result');
-    ankiTemplatesValidate(infoNode, '{expression}', 'term-kanji', false, true);
-}
+    async _getDefinition(text, optionsContext) {
+        if (this._cachedDefinitionText !== text) {
+            const {definitions} = await api.termsFind(text, {}, optionsContext);
+            if (definitions.length === 0) { return null; }
 
-function onAnkiTemplateMarkerClicked(e) {
-    e.preventDefault();
-    document.querySelector('#field-template-render-text').value = `{${e.target.textContent}}`;
-}
+            this._cachedDefinitionValue = definitions[0];
+            this._cachedDefinitionText = text;
+        }
+        return this._cachedDefinitionValue;
+    }
 
-function onAnkiTemplateRender(e) {
-    e.preventDefault();
+    async _validate(infoNode, field, mode, showSuccessResult, invalidateInput) {
+        const text = document.querySelector('#field-templates-preview-text').value || '';
+        const exceptions = [];
+        let result = `No definition found for ${text}`;
+        try {
+            const optionsContext = getOptionsContext();
+            const definition = await this._getDefinition(text, optionsContext);
+            if (definition !== null) {
+                const options = await api.optionsGet(optionsContext);
+                const context = {
+                    document: {
+                        title: document.title
+                    }
+                };
+                let templates = options.anki.fieldTemplates;
+                if (typeof templates !== 'string') { templates = await api.getDefaultAnkiFieldTemplates(); }
+                const ankiNoteBuilder = new AnkiNoteBuilder({renderTemplate: api.templateRender.bind(api)});
+                result = await ankiNoteBuilder.formatField(field, definition, mode, context, options, templates, exceptions);
+            }
+        } catch (e) {
+            exceptions.push(e);
+        }
 
-    const field = document.querySelector('#field-template-render-text').value;
-    const infoNode = document.querySelector('#field-template-render-result');
-    infoNode.hidden = true;
-    ankiTemplatesValidate(infoNode, field, 'term-kanji', true, false);
+        const hasException = exceptions.length > 0;
+        infoNode.hidden = !(showSuccessResult || hasException);
+        infoNode.textContent = hasException ? exceptions.map((e) => `${e}`).join('\n') : (showSuccessResult ? result : '');
+        infoNode.classList.toggle('text-danger', hasException);
+        if (invalidateInput) {
+            const input = document.querySelector('#field-templates');
+            input.classList.toggle('is-invalid', hasException);
+        }
+    }
 }
diff --git a/ext/bg/js/settings/anki.js b/ext/bg/js/settings/anki.js
index 8de97554..d110ef39 100644
--- a/ext/bg/js/settings/anki.js
+++ b/ext/bg/js/settings/anki.js
@@ -23,287 +23,281 @@
  * utilBackgroundIsolate
  */
 
-// Private
-
-function _ankiSpinnerShow(show) {
-    const spinner = $('#anki-spinner');
-    if (show) {
-        spinner.show();
-    } else {
-        spinner.hide();
-    }
-}
+class AnkiController {
+    prepare() {
+        $('#anki-fields-container input,#anki-fields-container select,#anki-fields-container textarea').change(this._onFieldsChanged.bind(this));
 
-function _ankiSetError(error) {
-    const node = document.querySelector('#anki-error');
-    const node2 = document.querySelector('#anki-invalid-response-error');
-    if (error) {
-        const errorString = `${error}`;
-        if (node !== null) {
-            node.hidden = false;
-            node.textContent = errorString;
-            _ankiSetErrorData(node, error);
+        for (const node of document.querySelectorAll('#anki-terms-model,#anki-kanji-model')) {
+            node.addEventListener('change', this._onModelChanged.bind(this), false);
         }
 
-        if (node2 !== null) {
-            node2.hidden = (errorString.indexOf('Invalid response') < 0);
-        }
-    } else {
-        if (node !== null) {
-            node.hidden = true;
-            node.textContent = '';
+        this.optionsChanged();
+    }
+
+    async optionsChanged(options=null) {
+        if (options === null) {
+            const optionsContext = getOptionsContext();
+            options = await getOptionsMutable(optionsContext);
         }
 
-        if (node2 !== null) {
-            node2.hidden = true;
+        if (!options.anki.enable) {
+            return;
         }
-    }
-}
 
-function _ankiSetErrorData(node, error) {
-    const data = error.data;
-    let message = '';
-    if (typeof data !== 'undefined') {
-        message += `${JSON.stringify(data, null, 4)}\n\n`;
+        await this._deckAndModelPopulate(options);
+        await Promise.all([
+            this._fieldsPopulate('terms', options),
+            this._fieldsPopulate('kanji', options)
+        ]);
     }
-    message += `${error.stack}`.trimRight();
 
-    const button = document.createElement('a');
-    button.className = 'error-data-show-button';
-
-    const content = document.createElement('div');
-    content.className = 'error-data-container';
-    content.textContent = message;
-    content.hidden = true;
+    getFieldMarkers(type) {
+        switch (type) {
+            case 'terms':
+                return [
+                    'audio',
+                    'cloze-body',
+                    'cloze-prefix',
+                    'cloze-suffix',
+                    'dictionary',
+                    'document-title',
+                    'expression',
+                    'furigana',
+                    'furigana-plain',
+                    'glossary',
+                    'glossary-brief',
+                    'reading',
+                    'screenshot',
+                    'sentence',
+                    'tags',
+                    'url'
+                ];
+            case 'kanji':
+                return [
+                    'character',
+                    'dictionary',
+                    'document-title',
+                    'glossary',
+                    'kunyomi',
+                    'onyomi',
+                    'screenshot',
+                    'sentence',
+                    'tags',
+                    'url'
+                ];
+            default:
+                return [];
+        }
+    }
 
-    button.addEventListener('click', () => content.hidden = !content.hidden, false);
+    getFieldMarkersHtml(markers) {
+        const template = document.querySelector('#anki-field-marker-template').content;
+        const fragment = document.createDocumentFragment();
+        for (const marker of markers) {
+            const markerNode = document.importNode(template, true).firstChild;
+            markerNode.querySelector('.marker-link').textContent = marker;
+            fragment.appendChild(markerNode);
+        }
+        return fragment;
+    }
 
-    node.appendChild(button);
-    node.appendChild(content);
-}
+    // Private
 
-function _ankiSetDropdownOptions(dropdown, optionValues) {
-    const fragment = document.createDocumentFragment();
-    for (const optionValue of optionValues) {
-        const option = document.createElement('option');
-        option.value = optionValue;
-        option.textContent = optionValue;
-        fragment.appendChild(option);
+    _fieldsToDict(elements) {
+        const result = {};
+        for (const element of elements) {
+            result[element.dataset.field] = element.value;
+        }
+        return result;
     }
-    dropdown.textContent = '';
-    dropdown.appendChild(fragment);
-}
 
-async function _ankiDeckAndModelPopulate(options) {
-    const termsDeck = {value: options.anki.terms.deck, selector: '#anki-terms-deck'};
-    const kanjiDeck = {value: options.anki.kanji.deck, selector: '#anki-kanji-deck'};
-    const termsModel = {value: options.anki.terms.model, selector: '#anki-terms-model'};
-    const kanjiModel = {value: options.anki.kanji.model, selector: '#anki-kanji-model'};
-    try {
-        _ankiSpinnerShow(true);
-        const [deckNames, modelNames] = await Promise.all([api.getAnkiDeckNames(), api.getAnkiModelNames()]);
-        deckNames.sort();
-        modelNames.sort();
-        termsDeck.values = deckNames;
-        kanjiDeck.values = deckNames;
-        termsModel.values = modelNames;
-        kanjiModel.values = modelNames;
-        _ankiSetError(null);
-    } catch (error) {
-        _ankiSetError(error);
-    } finally {
-        _ankiSpinnerShow(false);
+    _spinnerShow(show) {
+        const spinner = $('#anki-spinner');
+        if (show) {
+            spinner.show();
+        } else {
+            spinner.hide();
+        }
     }
 
-    for (const {value, values, selector} of [termsDeck, kanjiDeck, termsModel, kanjiModel]) {
-        const node = document.querySelector(selector);
-        _ankiSetDropdownOptions(node, Array.isArray(values) ? values : [value]);
-        node.value = value;
+    _setError(error) {
+        const node = document.querySelector('#anki-error');
+        const node2 = document.querySelector('#anki-invalid-response-error');
+        if (error) {
+            const errorString = `${error}`;
+            if (node !== null) {
+                node.hidden = false;
+                node.textContent = errorString;
+                this._setErrorData(node, error);
+            }
+
+            if (node2 !== null) {
+                node2.hidden = (errorString.indexOf('Invalid response') < 0);
+            }
+        } else {
+            if (node !== null) {
+                node.hidden = true;
+                node.textContent = '';
+            }
+
+            if (node2 !== null) {
+                node2.hidden = true;
+            }
+        }
     }
-}
-
-function _ankiCreateFieldTemplate(name, value, markers) {
-    const template = document.querySelector('#anki-field-template').content;
-    const content = document.importNode(template, true).firstChild;
-
-    content.querySelector('.anki-field-name').textContent = name;
-
-    const field = content.querySelector('.anki-field-value');
-    field.dataset.field = name;
-    field.value = value;
 
-    content.querySelector('.anki-field-marker-list').appendChild(ankiGetFieldMarkersHtml(markers));
+    _setErrorData(node, error) {
+        const data = error.data;
+        let message = '';
+        if (typeof data !== 'undefined') {
+            message += `${JSON.stringify(data, null, 4)}\n\n`;
+        }
+        message += `${error.stack}`.trimRight();
 
-    return content;
-}
+        const button = document.createElement('a');
+        button.className = 'error-data-show-button';
 
-async function _ankiFieldsPopulate(tabId, options) {
-    const tab = document.querySelector(`.tab-pane[data-anki-card-type=${tabId}]`);
-    const container = tab.querySelector('tbody');
-    const markers = ankiGetFieldMarkers(tabId);
-
-    const fragment = document.createDocumentFragment();
-    const fields = options.anki[tabId].fields;
-    for (const name of Object.keys(fields)) {
-        const value = fields[name];
-        const html = _ankiCreateFieldTemplate(name, value, markers);
-        fragment.appendChild(html);
-    }
+        const content = document.createElement('div');
+        content.className = 'error-data-container';
+        content.textContent = message;
+        content.hidden = true;
 
-    container.textContent = '';
-    container.appendChild(fragment);
+        button.addEventListener('click', () => content.hidden = !content.hidden, false);
 
-    for (const node of container.querySelectorAll('.anki-field-value')) {
-        node.addEventListener('change', _onAnkiFieldsChanged, false);
-    }
-    for (const node of container.querySelectorAll('.marker-link')) {
-        node.addEventListener('click', _onAnkiMarkerClicked, false);
+        node.appendChild(button);
+        node.appendChild(content);
     }
-}
-
-function _onAnkiMarkerClicked(e) {
-    e.preventDefault();
-    const link = e.currentTarget;
-    const input = $(link).closest('.input-group').find('.anki-field-value')[0];
-    input.value = `{${link.textContent}}`;
-    input.dispatchEvent(new Event('change'));
-}
 
-async function _onAnkiModelChanged(e) {
-    const node = e.currentTarget;
-    let fieldNames;
-    try {
-        const modelName = node.value;
-        fieldNames = await api.getAnkiModelFieldNames(modelName);
-        _ankiSetError(null);
-    } catch (error) {
-        _ankiSetError(error);
-        return;
-    } finally {
-        _ankiSpinnerShow(false);
+    _setDropdownOptions(dropdown, optionValues) {
+        const fragment = document.createDocumentFragment();
+        for (const optionValue of optionValues) {
+            const option = document.createElement('option');
+            option.value = optionValue;
+            option.textContent = optionValue;
+            fragment.appendChild(option);
+        }
+        dropdown.textContent = '';
+        dropdown.appendChild(fragment);
     }
 
-    const tabId = node.dataset.ankiCardType;
-    if (tabId !== 'terms' && tabId !== 'kanji') { return; }
+    async _deckAndModelPopulate(options) {
+        const termsDeck = {value: options.anki.terms.deck, selector: '#anki-terms-deck'};
+        const kanjiDeck = {value: options.anki.kanji.deck, selector: '#anki-kanji-deck'};
+        const termsModel = {value: options.anki.terms.model, selector: '#anki-terms-model'};
+        const kanjiModel = {value: options.anki.kanji.model, selector: '#anki-kanji-model'};
+        try {
+            this._spinnerShow(true);
+            const [deckNames, modelNames] = await Promise.all([api.getAnkiDeckNames(), api.getAnkiModelNames()]);
+            deckNames.sort();
+            modelNames.sort();
+            termsDeck.values = deckNames;
+            kanjiDeck.values = deckNames;
+            termsModel.values = modelNames;
+            kanjiModel.values = modelNames;
+            this._setError(null);
+        } catch (error) {
+            this._setError(error);
+        } finally {
+            this._spinnerShow(false);
+        }
 
-    const fields = {};
-    for (const name of fieldNames) {
-        fields[name] = '';
+        for (const {value, values, selector} of [termsDeck, kanjiDeck, termsModel, kanjiModel]) {
+            const node = document.querySelector(selector);
+            this._setDropdownOptions(node, Array.isArray(values) ? values : [value]);
+            node.value = value;
+        }
     }
 
-    const optionsContext = getOptionsContext();
-    const options = await getOptionsMutable(optionsContext);
-    options.anki[tabId].fields = utilBackgroundIsolate(fields);
-    await settingsSaveOptions();
-
-    await _ankiFieldsPopulate(tabId, options);
-}
-
-async function _onAnkiFieldsChanged() {
-    const optionsContext = getOptionsContext();
-    const options = await getOptionsMutable(optionsContext);
-
-    options.anki.terms.deck = $('#anki-terms-deck').val();
-    options.anki.terms.model = $('#anki-terms-model').val();
-    options.anki.terms.fields = utilBackgroundIsolate(ankiFieldsToDict(document.querySelectorAll('#terms .anki-field-value')));
-    options.anki.kanji.deck = $('#anki-kanji-deck').val();
-    options.anki.kanji.model = $('#anki-kanji-model').val();
-    options.anki.kanji.fields = utilBackgroundIsolate(ankiFieldsToDict(document.querySelectorAll('#kanji .anki-field-value')));
+    _createFieldTemplate(name, value, markers) {
+        const template = document.querySelector('#anki-field-template').content;
+        const content = document.importNode(template, true).firstChild;
 
-    await settingsSaveOptions();
+        content.querySelector('.anki-field-name').textContent = name;
 
-    await onAnkiOptionsChanged(options);
-}
+        const field = content.querySelector('.anki-field-value');
+        field.dataset.field = name;
+        field.value = value;
 
+        content.querySelector('.anki-field-marker-list').appendChild(this.getFieldMarkersHtml(markers));
 
+        return content;
+    }
 
-// Public
+    async _fieldsPopulate(tabId, options) {
+        const tab = document.querySelector(`.tab-pane[data-anki-card-type=${tabId}]`);
+        const container = tab.querySelector('tbody');
+        const markers = this.getFieldMarkers(tabId);
+
+        const fragment = document.createDocumentFragment();
+        const fields = options.anki[tabId].fields;
+        for (const name of Object.keys(fields)) {
+            const value = fields[name];
+            const html = this._createFieldTemplate(name, value, markers);
+            fragment.appendChild(html);
+        }
 
-function ankiErrorShown() {
-    const node = document.querySelector('#anki-error');
-    return node && !node.hidden;
-}
+        container.textContent = '';
+        container.appendChild(fragment);
 
-function ankiFieldsToDict(elements) {
-    const result = {};
-    for (const element of elements) {
-        result[element.dataset.field] = element.value;
+        for (const node of container.querySelectorAll('.anki-field-value')) {
+            node.addEventListener('change', this._onFieldsChanged.bind(this), false);
+        }
+        for (const node of container.querySelectorAll('.marker-link')) {
+            node.addEventListener('click', this._onMarkerClicked.bind(this), false);
+        }
     }
-    return result;
-}
 
-
-function ankiGetFieldMarkersHtml(markers) {
-    const template = document.querySelector('#anki-field-marker-template').content;
-    const fragment = document.createDocumentFragment();
-    for (const marker of markers) {
-        const markerNode = document.importNode(template, true).firstChild;
-        markerNode.querySelector('.marker-link').textContent = marker;
-        fragment.appendChild(markerNode);
+    _onMarkerClicked(e) {
+        e.preventDefault();
+        const link = e.currentTarget;
+        const input = $(link).closest('.input-group').find('.anki-field-value')[0];
+        input.value = `{${link.textContent}}`;
+        input.dispatchEvent(new Event('change'));
     }
-    return fragment;
-}
 
-function ankiGetFieldMarkers(type) {
-    switch (type) {
-        case 'terms':
-            return [
-                'audio',
-                'cloze-body',
-                'cloze-prefix',
-                'cloze-suffix',
-                'dictionary',
-                'document-title',
-                'expression',
-                'furigana',
-                'furigana-plain',
-                'glossary',
-                'glossary-brief',
-                'reading',
-                'screenshot',
-                'sentence',
-                'tags',
-                'url'
-            ];
-        case 'kanji':
-            return [
-                'character',
-                'dictionary',
-                'document-title',
-                'glossary',
-                'kunyomi',
-                'onyomi',
-                'screenshot',
-                'sentence',
-                'tags',
-                'url'
-            ];
-        default:
-            return [];
-    }
-}
+    async _onModelChanged(e) {
+        const node = e.currentTarget;
+        let fieldNames;
+        try {
+            const modelName = node.value;
+            fieldNames = await api.getAnkiModelFieldNames(modelName);
+            this._setError(null);
+        } catch (error) {
+            this._setError(error);
+            return;
+        } finally {
+            this._spinnerShow(false);
+        }
 
+        const tabId = node.dataset.ankiCardType;
+        if (tabId !== 'terms' && tabId !== 'kanji') { return; }
 
-function ankiInitialize() {
-    $('#anki-fields-container input,#anki-fields-container select,#anki-fields-container textarea').change(_onAnkiFieldsChanged);
+        const fields = {};
+        for (const name of fieldNames) {
+            fields[name] = '';
+        }
 
-    for (const node of document.querySelectorAll('#anki-terms-model,#anki-kanji-model')) {
-        node.addEventListener('change', _onAnkiModelChanged, false);
-    }
+        const optionsContext = getOptionsContext();
+        const options = await getOptionsMutable(optionsContext);
+        options.anki[tabId].fields = utilBackgroundIsolate(fields);
+        await settingsSaveOptions();
 
-    onAnkiOptionsChanged();
-}
+        await this._fieldsPopulate(tabId, options);
+    }
 
-async function onAnkiOptionsChanged(options=null) {
-    if (options === null) {
+    async _onFieldsChanged() {
         const optionsContext = getOptionsContext();
-        options = await getOptionsMutable(optionsContext);
-    }
+        const options = await getOptionsMutable(optionsContext);
 
-    if (!options.anki.enable) {
-        return;
-    }
+        options.anki.terms.deck = $('#anki-terms-deck').val();
+        options.anki.terms.model = $('#anki-terms-model').val();
+        options.anki.terms.fields = utilBackgroundIsolate(this._fieldsToDict(document.querySelectorAll('#terms .anki-field-value')));
+        options.anki.kanji.deck = $('#anki-kanji-deck').val();
+        options.anki.kanji.model = $('#anki-kanji-model').val();
+        options.anki.kanji.fields = utilBackgroundIsolate(this._fieldsToDict(document.querySelectorAll('#kanji .anki-field-value')));
+
+        await settingsSaveOptions();
 
-    await _ankiDeckAndModelPopulate(options);
-    await Promise.all([_ankiFieldsPopulate('terms', options), _ankiFieldsPopulate('kanji', options)]);
+        await this.optionsChanged(options);
+    }
 }
diff --git a/ext/bg/js/settings/main.js b/ext/bg/js/settings/main.js
index 64611ad5..872f8f05 100644
--- a/ext/bg/js/settings/main.js
+++ b/ext/bg/js/settings/main.js
@@ -16,17 +16,15 @@
  */
 
 /* global
+ * AnkiController
+ * AnkiTemplatesController
  * ProfileController
  * SettingsBackup
  * SettingsController
- * ankiInitialize
- * ankiTemplatesInitialize
- * ankiTemplatesUpdateValue
  * api
  * appearanceInitialize
  * audioSettingsInitialize
  * dictSettingsInitialize
- * onAnkiOptionsChanged
  * onDictionaryOptionsChanged
  * storageInfoInitialize
  * utilBackend
@@ -269,9 +267,13 @@ async function onOptionsUpdated({source}) {
     const options = await getOptionsMutable(optionsContext);
 
     document.querySelector('#enable-clipboard-popups').checked = options.general.enableClipboardPopups;
-    ankiTemplatesUpdateValue();
+    if (ankiTemplatesController !== null) {
+        ankiTemplatesController.updateValue();
+    }
     onDictionaryOptionsChanged();
-    onAnkiOptionsChanged();
+    if (ankiController !== null) {
+        ankiController.optionsChanged();
+    }
 
     await formWrite(options);
 }
@@ -302,6 +304,8 @@ async function settingsPopulateModifierKeys() {
     }
 }
 
+let ankiController = null;
+let ankiTemplatesController = null;
 
 async function onReady() {
     api.forwardLogsToBackend();
@@ -318,8 +322,10 @@ async function onReady() {
     await audioSettingsInitialize();
     await (new ProfileController()).prepare();
     await dictSettingsInitialize();
-    ankiInitialize();
-    ankiTemplatesInitialize();
+    ankiController = new AnkiController();
+    ankiController.prepare();
+    ankiTemplatesController = new AnkiTemplatesController(ankiController);
+    ankiTemplatesController.prepare();
     new SettingsBackup().prepare();
 
     storageInfoInitialize();