yomichan/ext/js/data/anki-util.js

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/*
* Copyright (C) 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/>.
*/
/**
* This class has some general utility functions for working with Anki data.
*/
class AnkiUtil {
/**
* Gets the root deck name of a full deck name. If the deck is a root deck,
* the same name is returned. Nested decks are separated using '::'.
* @param deckName A string of the deck name.
* @returns A string corresponding to the name of the root deck.
*/
static getRootDeckName(deckName) {
const index = deckName.indexOf('::');
return index >= 0 ? deckName.substring(0, index) : deckName;
}
/**
* Checks whether or not any marker is contained in a string.
* @param string A string to check.
* @return `true` if the text contains an Anki field marker, `false` otherwise.
*/
static stringContainsAnyFieldMarker(string) {
const result = this._markerPattern.test(string);
this._markerPattern.lastIndex = 0;
return result;
}
/**
* Gets a list of all markers that are contained in a string.
* @param string A string to check.
* @return An array of marker strings.
*/
static getFieldMarkers(string) {
const pattern = this._markerPattern;
const markers = [];
while (true) {
const match = pattern.exec(string);
if (match === null) { break; }
markers.push(match[1]);
}
return markers;
}
/**
* Checks whether an object of key-value pairs has a value which contains a specific marker.
* @param fieldsObject An object with key-value pairs, where the value corresponds to the field value.
* @param marker The marker string to check for, excluding brackets.
* @returns `true` if any of the fields contains the marker, `false` otherwise.
*/
static fieldsObjectContainsMarker(fieldsObject, marker) {
marker = `{${marker}}`;
for (const [, fieldValue] of fieldsObject) {
if (fieldValue.includes(marker)) {
return true;
}
}
return false;
}
/**
* Returns a regular expression which can be used to find markers in a string.
* @param global Whether or not the regular expression should have the global flag.
* @returns A new `RegExp` instance.
*/
static cloneFieldMarkerPattern(global) {
return new RegExp(this._markerPattern.source, global ? 'g' : '');
}
/**
* Checks whether or not a note object is valid.
* @param note A note object to check.
* @return `true` if the note is valid, `false` otherwise.
*/
static isNoteDataValid(note) {
if (!isObject(note)) { return false; }
const {fields, deckName, modelName} = note;
return (
typeof deckName === 'string' &&
typeof modelName === 'string' &&
Object.entries(fields).length > 0
);
}
}
// eslint-disable-next-line no-underscore-dangle
AnkiUtil._markerPattern = /\{([\w-]+)\}/g;