Move bg/js/settings(2) (#1385)

* Move bg/js/settings/ to js/settings/

* Move bg/js/settings2/ to js/settings/

1 files changed, 729 insertions, 0 deletions

diff --git a/ext/js/settings/anki-controller.js b/ext/js/settings/anki-controller.js
new file mode 100644
index 00000000..db3e3c14
--- /dev/null
+++ b/ext/js/settings/anki-controller.js
@@ -0,0 +1,729 @@
+/*
+ * Copyright (C) 2019-2021  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
+ * AnkiConnect
+ * AnkiNoteBuilder
+ * ObjectPropertyAccessor
+ * SelectorObserver
+ */
+
+class AnkiController {
+    constructor(settingsController) {
+        this._settingsController = settingsController;
+        this._ankiConnect = new AnkiConnect();
+        this._ankiNoteBuilder = new AnkiNoteBuilder(false);
+        this._selectorObserver = new SelectorObserver({
+            selector: '.anki-card',
+            ignoreSelector: null,
+            onAdded: this._createCardController.bind(this),
+            onRemoved: this._removeCardController.bind(this),
+            isStale: this._isCardControllerStale.bind(this)
+        });
+        this._stringComparer = new Intl.Collator(); // Locale does not matter
+        this._getAnkiDataPromise = null;
+        this._ankiErrorContainer = null;
+        this._ankiErrorMessageNode = null;
+        this._ankiErrorMessageNodeDefaultContent = '';
+        this._ankiErrorMessageDetailsNode = null;
+        this._ankiErrorMessageDetailsContainer = null;
+        this._ankiErrorMessageDetailsToggle = null;
+        this._ankiErrorInvalidResponseInfo = null;
+        this._ankiCardPrimary = null;
+        this._ankiCardPrimaryType = null;
+        this._validateFieldsToken = null;
+    }
+
+    get settingsController() {
+        return this._settingsController;
+    }
+
+    async prepare() {
+        this._ankiErrorContainer = document.querySelector('#anki-error');
+        this._ankiErrorMessageNode = document.querySelector('#anki-error-message');
+        this._ankiErrorMessageNodeDefaultContent = this._ankiErrorMessageNode.textContent;
+        this._ankiErrorMessageDetailsNode = document.querySelector('#anki-error-message-details');
+        this._ankiErrorMessageDetailsContainer = document.querySelector('#anki-error-message-details-container');
+        this._ankiErrorMessageDetailsToggle = document.querySelector('#anki-error-message-details-toggle');
+        this._ankiErrorInvalidResponseInfo = document.querySelector('#anki-error-invalid-response-info');
+        this._ankiEnableCheckbox = document.querySelector('[data-setting="anki.enable"]');
+        this._ankiCardPrimary = document.querySelector('#anki-card-primary');
+        this._ankiCardPrimaryType = document.querySelector('#anki-card-primary-type');
+
+        this._setupFieldMenus();
+
+        this._ankiErrorMessageDetailsToggle.addEventListener('click', this._onAnkiErrorMessageDetailsToggleClick.bind(this), false);
+        if (this._ankiEnableCheckbox !== null) { this._ankiEnableCheckbox.addEventListener('settingChanged', this._onAnkiEnableChanged.bind(this), false); }
+        if (this._ankiCardPrimaryType !== null) { this._ankiCardPrimaryType.addEventListener('change', this._onAnkiCardPrimaryTypeChange.bind(this), false); }
+
+        const options = await this._settingsController.getOptions();
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+        this._onOptionsChanged({options});
+    }
+
+    getFieldMarkers(type) {
+        switch (type) {
+            case 'terms':
+                return [
+                    'audio',
+                    'clipboard-image',
+                    'clipboard-text',
+                    'cloze-body',
+                    'cloze-prefix',
+                    'cloze-suffix',
+                    'conjugation',
+                    'dictionary',
+                    'document-title',
+                    'expression',
+                    'frequencies',
+                    'furigana',
+                    'furigana-plain',
+                    'glossary',
+                    'glossary-brief',
+                    'glossary-no-dictionary',
+                    'pitch-accents',
+                    'pitch-accent-graphs',
+                    'pitch-accent-positions',
+                    'reading',
+                    'screenshot',
+                    'sentence',
+                    'tags',
+                    'url'
+                ];
+            case 'kanji':
+                return [
+                    'character',
+                    'clipboard-image',
+                    'clipboard-text',
+                    'cloze-body',
+                    'cloze-prefix',
+                    'cloze-suffix',
+                    'dictionary',
+                    'document-title',
+                    'glossary',
+                    'kunyomi',
+                    'onyomi',
+                    'screenshot',
+                    'sentence',
+                    'stroke-count',
+                    'tags',
+                    'url'
+                ];
+            default:
+                return [];
+        }
+    }
+
+    getFieldMarkersHtml(markers) {
+        const fragment = document.createDocumentFragment();
+        for (const marker of markers) {
+            const markerNode = this._settingsController.instantiateTemplate('anki-card-field-marker');
+            markerNode.querySelector('.marker-link').textContent = marker;
+            fragment.appendChild(markerNode);
+        }
+        return fragment;
+    }
+
+    async getAnkiData() {
+        let promise = this._getAnkiDataPromise;
+        if (promise === null) {
+            promise = this._getAnkiData();
+            this._getAnkiDataPromise = promise;
+            promise.finally(() => { this._getAnkiDataPromise = null; });
+        }
+        return promise;
+    }
+
+    async getModelFieldNames(model) {
+        return await this._ankiConnect.getModelFieldNames(model);
+    }
+
+    getRequiredPermissions(fieldValue) {
+        return this._settingsController.permissionsUtil.getRequiredPermissionsForAnkiFieldValue(fieldValue);
+    }
+
+    containsAnyMarker(field) {
+        return this._ankiNoteBuilder.containsAnyMarker(field);
+    }
+
+    // Private
+
+    async _onOptionsChanged({options: {anki}}) {
+        this._ankiConnect.server = anki.server;
+        this._ankiConnect.enabled = anki.enable;
+
+        this._selectorObserver.disconnect();
+        this._selectorObserver.observe(document.documentElement, true);
+    }
+
+    _onAnkiErrorMessageDetailsToggleClick() {
+        const node = this._ankiErrorMessageDetailsContainer;
+        node.hidden = !node.hidden;
+    }
+
+    _onAnkiEnableChanged({detail: {value}}) {
+        if (this._ankiConnect.server === null) { return; }
+        this._ankiConnect.enabled = value;
+
+        for (const cardController of this._selectorObserver.datas()) {
+            cardController.updateAnkiState();
+        }
+    }
+
+    _onAnkiCardPrimaryTypeChange(e) {
+        if (this._ankiCardPrimary === null) { return; }
+        const node = e.currentTarget;
+        let ankiCardMenu;
+        if (node.selectedIndex >= 0) {
+            const option = node.options[node.selectedIndex];
+            ankiCardMenu = option.dataset.ankiCardMenu;
+        }
+
+        this._ankiCardPrimary.dataset.ankiCardType = node.value;
+        if (typeof ankiCardMenu !== 'undefined') {
+            this._ankiCardPrimary.dataset.ankiCardMenu = ankiCardMenu;
+        } else {
+            delete this._ankiCardPrimary.dataset.ankiCardMenu;
+        }
+    }
+
+    _createCardController(node) {
+        const cardController = new AnkiCardController(this._settingsController, this, node);
+        cardController.prepare();
+        return cardController;
+    }
+
+    _removeCardController(node, cardController) {
+        cardController.cleanup();
+    }
+
+    _isCardControllerStale(node, cardController) {
+        return cardController.isStale();
+    }
+
+    _setupFieldMenus() {
+        const fieldMenuTargets = [
+            [['terms'], '#anki-card-terms-field-menu-template'],
+            [['kanji'], '#anki-card-kanji-field-menu-template'],
+            [['terms', 'kanji'], '#anki-card-all-field-menu-template']
+        ];
+        for (const [types, selector] of fieldMenuTargets) {
+            const element = document.querySelector(selector);
+            if (element === null) { continue; }
+
+            let markers = [];
+            for (const type of types) {
+                markers.push(...this.getFieldMarkers(type));
+            }
+            markers = [...new Set(markers)];
+
+            const container = element.content.querySelector('.popup-menu-body');
+            if (container === null) { return; }
+
+            const fragment = document.createDocumentFragment();
+            for (const marker of markers) {
+                const option = document.createElement('button');
+                option.textContent = marker;
+                option.className = 'popup-menu-item';
+                option.dataset.menuAction = 'setFieldMarker';
+                option.dataset.marker = marker;
+                fragment.appendChild(option);
+            }
+            container.appendChild(fragment);
+        }
+    }
+
+    async _getAnkiData() {
+        this._setAnkiStatusChanging();
+        const [
+            [deckNames, error1],
+            [modelNames, error2]
+        ] = await Promise.all([
+            this._getDeckNames(),
+            this._getModelNames()
+        ]);
+
+        if (error1 !== null) {
+            this._showAnkiError(error1);
+        } else if (error2 !== null) {
+            this._showAnkiError(error2);
+        } else {
+            this._hideAnkiError();
+        }
+
+        return {deckNames, modelNames};
+    }
+
+    async _getDeckNames() {
+        try {
+            const result = await this._ankiConnect.getDeckNames();
+            this._sortStringArray(result);
+            return [result, null];
+        } catch (e) {
+            return [[], e];
+        }
+    }
+
+    async _getModelNames() {
+        try {
+            const result = await this._ankiConnect.getModelNames();
+            this._sortStringArray(result);
+            return [result, null];
+        } catch (e) {
+            return [[], e];
+        }
+    }
+
+    _setAnkiStatusChanging() {
+        this._ankiErrorMessageNode.textContent = this._ankiErrorMessageNodeDefaultContent;
+        this._ankiErrorMessageNode.classList.remove('danger-text');
+    }
+
+    _hideAnkiError() {
+        if (this._ankiErrorContainer !== null) {
+            this._ankiErrorContainer.hidden = true;
+        }
+        this._ankiErrorMessageDetailsContainer.hidden = true;
+        this._ankiErrorMessageDetailsToggle.hidden = true;
+        this._ankiErrorInvalidResponseInfo.hidden = true;
+        this._ankiErrorMessageNode.textContent = (this._ankiConnect.enabled ? 'Connected' : 'Not enabled');
+        this._ankiErrorMessageNode.classList.remove('danger-text');
+        this._ankiErrorMessageDetailsNode.textContent = '';
+    }
+
+    _showAnkiError(error) {
+        let errorString = typeof error === 'object' && error !== null ? error.message : null;
+        if (!errorString) { errorString = `${error}`; }
+        if (!/[.!?]$/.test(errorString)) { errorString += '.'; }
+        this._ankiErrorMessageNode.textContent = errorString;
+        this._ankiErrorMessageNode.classList.add('danger-text');
+
+        const data = error.data;
+        let details = '';
+        if (typeof data !== 'undefined') {
+            details += `${JSON.stringify(data, null, 4)}\n\n`;
+        }
+        details += `${error.stack}`.trimRight();
+        this._ankiErrorMessageDetailsNode.textContent = details;
+
+        if (this._ankiErrorContainer !== null) {
+            this._ankiErrorContainer.hidden = false;
+        }
+        this._ankiErrorMessageDetailsContainer.hidden = true;
+        this._ankiErrorInvalidResponseInfo.hidden = (errorString.indexOf('Invalid response') < 0);
+        this._ankiErrorMessageDetailsToggle.hidden = false;
+    }
+
+    _sortStringArray(array) {
+        const stringComparer = this._stringComparer;
+        array.sort((a, b) => stringComparer.compare(a, b));
+    }
+}
+
+class AnkiCardController {
+    constructor(settingsController, ankiController, node) {
+        this._settingsController = settingsController;
+        this._ankiController = ankiController;
+        this._node = node;
+        this._cardType = node.dataset.ankiCardType;
+        this._cardMenu = node.dataset.ankiCardMenu;
+        this._eventListeners = new EventListenerCollection();
+        this._fieldEventListeners = new EventListenerCollection();
+        this._deck = null;
+        this._model = null;
+        this._fields = null;
+        this._modelChangingTo = null;
+        this._ankiCardDeckSelect = null;
+        this._ankiCardModelSelect = null;
+        this._ankiCardFieldsContainer = null;
+        this._cleaned = false;
+        this._fieldEntries = [];
+    }
+
+    async prepare() {
+        const options = await this._settingsController.getOptions();
+        const ankiOptions = options.anki;
+        if (this._cleaned) { return; }
+
+        const cardOptions = this._getCardOptions(ankiOptions, this._cardType);
+        if (cardOptions === null) { return; }
+        const {deck, model, fields} = cardOptions;
+        this._deck = deck;
+        this._model = model;
+        this._fields = fields;
+
+        this._ankiCardDeckSelect = this._node.querySelector('.anki-card-deck');
+        this._ankiCardModelSelect = this._node.querySelector('.anki-card-model');
+        this._ankiCardFieldsContainer = this._node.querySelector('.anki-card-fields');
+
+        this._setupSelects([], []);
+        this._setupFields();
+
+        this._eventListeners.addEventListener(this._ankiCardDeckSelect, 'change', this._onCardDeckChange.bind(this), false);
+        this._eventListeners.addEventListener(this._ankiCardModelSelect, 'change', this._onCardModelChange.bind(this), false);
+        this._eventListeners.on(this._settingsController, 'permissionsChanged', this._onPermissionsChanged.bind(this));
+
+        await this.updateAnkiState();
+    }
+
+    cleanup() {
+        this._cleaned = true;
+        this._fieldEntries = [];
+        this._eventListeners.removeAllEventListeners();
+    }
+
+    async updateAnkiState() {
+        if (this._fields === null) { return; }
+        const {deckNames, modelNames} = await this._ankiController.getAnkiData();
+        if (this._cleaned) { return; }
+        this._setupSelects(deckNames, modelNames);
+    }
+
+    isStale() {
+        return (this._cardType !== this._node.dataset.ankiCardType);
+    }
+
+    // Private
+
+    _onCardDeckChange(e) {
+        this._setDeck(e.currentTarget.value);
+    }
+
+    _onCardModelChange(e) {
+        this._setModel(e.currentTarget.value);
+    }
+
+    _onFieldChange(index, e) {
+        const node = e.currentTarget;
+        this._validateFieldPermissions(node, index, true);
+        this._validateField(node, index);
+    }
+
+    _onFieldInput(index, e) {
+        const node = e.currentTarget;
+        this._validateField(node, index);
+    }
+
+    _onFieldSettingChanged(index, e) {
+        const node = e.currentTarget;
+        this._validateFieldPermissions(node, index, false);
+    }
+
+    _onFieldMenuClose({currentTarget: button, detail: {action, item}}) {
+        switch (action) {
+            case 'setFieldMarker':
+                this._setFieldMarker(button, item.dataset.marker);
+                break;
+        }
+    }
+
+    _onFieldMarkerLinkClick(e) {
+        e.preventDefault();
+        const link = e.currentTarget;
+        this._setFieldMarker(link, link.textContent);
+    }
+
+    _validateField(node, index) {
+        let valid = (node.dataset.hasPermissions !== 'false');
+        if (valid && index === 0 && !this._ankiController.containsAnyMarker(node.value)) {
+            valid = false;
+        }
+        node.dataset.invalid = `${!valid}`;
+    }
+
+    _setFieldMarker(element, marker) {
+        const input = element.closest('.anki-card-field-value-container').querySelector('.anki-card-field-value');
+        input.value = `{${marker}}`;
+        input.dispatchEvent(new Event('change'));
+    }
+
+    _getCardOptions(ankiOptions, cardType) {
+        switch (cardType) {
+            case 'terms': return ankiOptions.terms;
+            case 'kanji': return ankiOptions.kanji;
+            default: return null;
+        }
+    }
+
+    _setupSelects(deckNames, modelNames) {
+        const deck = this._deck;
+        const model = this._model;
+        if (!deckNames.includes(deck)) { deckNames = [...deckNames, deck]; }
+        if (!modelNames.includes(model)) { modelNames = [...modelNames, model]; }
+
+        this._setSelectOptions(this._ankiCardDeckSelect, deckNames);
+        this._ankiCardDeckSelect.value = deck;
+
+        this._setSelectOptions(this._ankiCardModelSelect, modelNames);
+        this._ankiCardModelSelect.value = model;
+    }
+
+    _setSelectOptions(select, optionValues) {
+        const fragment = document.createDocumentFragment();
+        for (const optionValue of optionValues) {
+            const option = document.createElement('option');
+            option.value = optionValue;
+            option.textContent = optionValue;
+            fragment.appendChild(option);
+        }
+        select.textContent = '';
+        select.appendChild(fragment);
+    }
+
+    _setupFields() {
+        this._fieldEventListeners.removeAllEventListeners();
+
+        const markers = this._ankiController.getFieldMarkers(this._cardType);
+        const totalFragment = document.createDocumentFragment();
+        this._fieldEntries = [];
+        let index = 0;
+        for (const [fieldName, fieldValue] of Object.entries(this._fields)) {
+            const content = this._settingsController.instantiateTemplateFragment('anki-card-field');
+
+            const fieldNameContainerNode = content.querySelector('.anki-card-field-name-container');
+            fieldNameContainerNode.dataset.index = `${index}`;
+            const fieldNameNode = content.querySelector('.anki-card-field-name');
+            fieldNameNode.textContent = fieldName;
+
+            const valueContainer = content.querySelector('.anki-card-field-value-container');
+            valueContainer.dataset.index = `${index}`;
+
+            const inputField = content.querySelector('.anki-card-field-value');
+            inputField.value = fieldValue;
+            inputField.dataset.setting = ObjectPropertyAccessor.getPathString(['anki', this._cardType, 'fields', fieldName]);
+            this._validateFieldPermissions(inputField, index, false);
+
+            this._fieldEventListeners.addEventListener(inputField, 'change', this._onFieldChange.bind(this, index), false);
+            this._fieldEventListeners.addEventListener(inputField, 'input', this._onFieldInput.bind(this, index), false);
+            this._fieldEventListeners.addEventListener(inputField, 'settingChanged', this._onFieldSettingChanged.bind(this, index), false);
+            this._validateField(inputField, index);
+
+            const markerList = content.querySelector('.anki-card-field-marker-list');
+            if (markerList !== null) {
+                const markersFragment = this._ankiController.getFieldMarkersHtml(markers);
+                for (const element of markersFragment.querySelectorAll('.marker-link')) {
+                    this._fieldEventListeners.addEventListener(element, 'click', this._onFieldMarkerLinkClick.bind(this), false);
+                }
+                markerList.appendChild(markersFragment);
+            }
+
+            const menuButton = content.querySelector('.anki-card-field-value-menu-button');
+            if (menuButton !== null) {
+                if (typeof this._cardMenu !== 'undefined') {
+                    menuButton.dataset.menu = this._cardMenu;
+                } else {
+                    delete menuButton.dataset.menu;
+                }
+                this._fieldEventListeners.addEventListener(menuButton, 'menuClose', this._onFieldMenuClose.bind(this), false);
+            }
+
+            totalFragment.appendChild(content);
+            this._fieldEntries.push({fieldName, inputField, fieldNameContainerNode});
+
+            ++index;
+        }
+
+        const ELEMENT_NODE = Node.ELEMENT_NODE;
+        const container = this._ankiCardFieldsContainer;
+        for (const node of [...container.childNodes]) {
+            if (node.nodeType === ELEMENT_NODE && node.dataset.persistent === 'true') { continue; }
+            container.removeChild(node);
+        }
+        container.appendChild(totalFragment);
+
+        this._validateFields();
+    }
+
+    async _validateFields() {
+        const token = {};
+        this._validateFieldsToken = token;
+
+        let fieldNames;
+        try {
+            fieldNames = await this._ankiController.getModelFieldNames(this._model);
+        } catch (e) {
+            return;
+        }
+
+        if (token !== this._validateFieldsToken) { return; }
+
+        const fieldNamesSet = new Set(fieldNames);
+        let index = 0;
+        for (const {fieldName, fieldNameContainerNode} of this._fieldEntries) {
+            fieldNameContainerNode.dataset.invalid = `${!fieldNamesSet.has(fieldName)}`;
+            fieldNameContainerNode.dataset.orderMatches = `${index < fieldNames.length && fieldName === fieldNames[index]}`;
+            ++index;
+        }
+    }
+
+    async _setDeck(value) {
+        if (this._deck === value) { return; }
+        this._deck = value;
+
+        await this._settingsController.modifyProfileSettings([{
+            action: 'set',
+            path: ObjectPropertyAccessor.getPathString(['anki', this._cardType, 'deck']),
+            value
+        }]);
+    }
+
+    async _setModel(value) {
+        if (this._modelChangingTo !== null) {
+            // Revert
+            this._ankiCardModelSelect.value = this._modelChangingTo;
+            return;
+        }
+        if (this._model === value) { return; }
+
+        let fieldNames;
+        let options;
+        try {
+            this._modelChangingTo = value;
+            fieldNames = await this._ankiController.getModelFieldNames(value);
+            options = await this._ankiController.settingsController.getOptions();
+        } catch (e) {
+            // Revert
+            this._ankiCardModelSelect.value = this._model;
+            return;
+        } finally {
+            this._modelChangingTo = null;
+        }
+
+        const cardType = this._cardType;
+        const cardOptions = this._getCardOptions(options.anki, cardType);
+        const oldFields = cardOptions !== null ? cardOptions.fields : null;
+
+        const fields = {};
+        for (let i = 0, ii = fieldNames.length; i < ii; ++i) {
+            const fieldName = fieldNames[i];
+            fields[fieldName] = this._getDefaultFieldValue(fieldName, i, cardType, oldFields);
+        }
+
+        const targets = [
+            {
+                action: 'set',
+                path: ObjectPropertyAccessor.getPathString(['anki', this._cardType, 'model']),
+                value
+            },
+            {
+                action: 'set',
+                path: ObjectPropertyAccessor.getPathString(['anki', this._cardType, 'fields']),
+                value: fields
+            }
+        ];
+
+        this._model = value;
+        this._fields = fields;
+
+        await this._settingsController.modifyProfileSettings(targets);
+
+        this._setupFields();
+    }
+
+    async _requestPermissions(permissions) {
+        try {
+            await this._settingsController.permissionsUtil.setPermissionsGranted({permissions}, true);
+        } catch (e) {
+            yomichan.logError(e);
+        }
+    }
+
+    async _validateFieldPermissions(node, index, request) {
+        const fieldValue = node.value;
+        const permissions = this._ankiController.getRequiredPermissions(fieldValue);
+        if (permissions.length > 0) {
+            node.dataset.requiredPermission = permissions.join(' ');
+            const hasPermissions = await (
+                request ?
+                this._settingsController.permissionsUtil.setPermissionsGranted({permissions}, true) :
+                this._settingsController.permissionsUtil.hasPermissions({permissions})
+            );
+            node.dataset.hasPermissions = `${hasPermissions}`;
+        } else {
+            delete node.dataset.requiredPermission;
+            delete node.dataset.hasPermissions;
+        }
+
+        this._validateField(node, index);
+    }
+
+    _onPermissionsChanged({permissions: {permissions}}) {
+        const permissionsSet = new Set(permissions);
+        for (let i = 0, ii = this._fieldEntries.length; i < ii; ++i) {
+            const {inputField} = this._fieldEntries[i];
+            let {requiredPermission} = inputField.dataset;
+            if (typeof requiredPermission !== 'string') { continue; }
+            requiredPermission = (requiredPermission.length === 0 ? [] : requiredPermission.split(' '));
+
+            let hasPermissions = true;
+            for (const permission of requiredPermission) {
+                if (!permissionsSet.has(permission)) {
+                    hasPermissions = false;
+                    break;
+                }
+            }
+
+            inputField.dataset.hasPermissions = `${hasPermissions}`;
+            this._validateField(inputField, i);
+        }
+    }
+
+    _getDefaultFieldValue(fieldName, index, cardType, oldFields) {
+        if (
+            typeof oldFields === 'object' &&
+            oldFields !== null &&
+            Object.prototype.hasOwnProperty.call(oldFields, fieldName)
+        ) {
+            return oldFields[fieldName];
+        }
+
+        if (index === 0) {
+            return (cardType === 'kanji' ? '{character}' : '{expression}');
+        }
+
+        const markers = this._ankiController.getFieldMarkers(cardType);
+        const markerAliases = new Map([
+            ['glossary', ['definition', 'meaning']],
+            ['audio', ['sound']],
+            ['dictionary', ['dict']]
+        ]);
+
+        const hyphenPattern = /-/g;
+        for (const marker of markers) {
+            const names = [marker];
+            const aliases = markerAliases.get(marker);
+            if (typeof aliases !== 'undefined') {
+                names.push(...aliases);
+            }
+
+            let pattern = '^(?:';
+            for (let i = 0, ii = names.length; i < ii; ++i) {
+                const name = names[i];
+                if (i > 0) { pattern += '|'; }
+                pattern += name.replace(hyphenPattern, '[-_ ]*');
+            }
+            pattern += ')$';
+            pattern = new RegExp(pattern, 'i');
+
+            if (pattern.test(fieldName)) {
+                return `{${marker}}`;
+            }
+        }
+
+        return '';
+    }
+}