mirror of
https://github.com/laurent22/joplin.git
synced 2024-12-27 10:32:58 +02:00
508 lines
14 KiB
JavaScript
508 lines
14 KiB
JavaScript
const { Database } = require('lib/database.js');
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const { uuid } = require('lib/uuid.js');
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const { time } = require('lib/time-utils.js');
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const Mutex = require('async-mutex').Mutex;
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class BaseModel {
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static modelType() {
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throw new Error('Must be overriden');
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}
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static tableName() {
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throw new Error('Must be overriden');
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}
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static addModelMd(model) {
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if (!model) return model;
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if (Array.isArray(model)) {
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let output = [];
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for (let i = 0; i < model.length; i++) {
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output.push(this.addModelMd(model[i]));
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}
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return output;
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} else {
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model = Object.assign({}, model);
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model.type_ = this.modelType();
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return model;
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}
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}
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static logger() {
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return this.db().logger();
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}
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static useUuid() {
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return false;
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}
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static byId(items, id) {
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for (let i = 0; i < items.length; i++) {
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if (items[i].id == id) return items[i];
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}
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return null;
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}
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// Prefer the use of this function to compare IDs as it handles the case where
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// one ID is null and the other is "", in which case they are actually considered to be the same.
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static idsEqual(id1, id2) {
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if (!id1 && !id2) return true;
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if (!id1 && !!id2) return false;
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if (!!id1 && !id2) return false;
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return id1 === id2;
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}
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static modelTypeToName(type) {
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for (let i = 0; i < BaseModel.typeEnum_.length; i++) {
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const e = BaseModel.typeEnum_[i];
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if (e[1] === type) return e[0].substr(5).toLowerCase();
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}
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throw new Error('Unknown model type: ' + type);
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}
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static hasField(name) {
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let fields = this.fieldNames();
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return fields.indexOf(name) >= 0;
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}
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static fieldNames(withPrefix = false) {
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let output = this.db().tableFieldNames(this.tableName());
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if (!withPrefix) return output;
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let p = withPrefix === true ? this.tableName() : withPrefix;
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let temp = [];
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for (let i = 0; i < output.length; i++) {
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temp.push(p + '.' + output[i]);
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}
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return temp;
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}
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static fieldType(name, defaultValue = null) {
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let fields = this.fields();
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for (let i = 0; i < fields.length; i++) {
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if (fields[i].name == name) return fields[i].type;
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}
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if (defaultValue !== null) return defaultValue;
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throw new Error('Unknown field: ' + name);
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}
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static fields() {
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return this.db().tableFields(this.tableName());
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}
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static new() {
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let fields = this.fields();
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let output = {};
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for (let i = 0; i < fields.length; i++) {
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let f = fields[i];
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output[f.name] = f.default;
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}
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return output;
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}
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static modOptions(options) {
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if (!options) {
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options = {};
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} else {
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options = Object.assign({}, options);
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}
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if (!('isNew' in options)) options.isNew = 'auto';
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if (!('autoTimestamp' in options)) options.autoTimestamp = true;
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return options;
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}
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static count(options = null) {
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if (!options) options = {};
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let sql = 'SELECT count(*) as total FROM `' + this.tableName() + '`';
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if (options.where) sql += ' WHERE ' + options.where;
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return this.db().selectOne(sql).then((r) => {
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return r ? r['total'] : 0;
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});
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}
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static load(id) {
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return this.loadByField('id', id);
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}
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static shortId(id) {
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return id.substr(0, 5);
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}
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static loadByPartialId(partialId) {
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return this.modelSelectAll('SELECT * FROM `' + this.tableName() + '` WHERE `id` LIKE ?', [partialId + '%']);
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}
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static applySqlOptions(options, sql, params = null) {
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if (!options) options = {};
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if (options.order && options.order.length) {
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let items = [];
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for (let i = 0; i < options.order.length; i++) {
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const o = options.order[i];
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let item = o.by;
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if (options.caseInsensitive === true) item += ' COLLATE NOCASE';
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if (o.dir) item += ' ' + o.dir;
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items.push(item);
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}
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sql += ' ORDER BY ' + items.join(', ');
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}
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if (options.limit) sql += ' LIMIT ' + options.limit;
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return { sql: sql, params: params };
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}
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static async allIds(options = null) {
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let q = this.applySqlOptions(options, 'SELECT id FROM `' + this.tableName() + '`');
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const rows = await this.db().selectAll(q.sql, q.params);
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return rows.map((r) => r.id);
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}
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static async all(options = null) {
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if (!options) options = {};
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if (!options.fields) options.fields = '*';
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let q = this.applySqlOptions(options, 'SELECT ' + this.db().escapeFields(options.fields) + ' FROM `' + this.tableName() + '`');
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return this.modelSelectAll(q.sql);
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}
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static async search(options = null) {
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if (!options) options = {};
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if (!options.fields) options.fields = '*';
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let conditions = options.conditions ? options.conditions.slice(0) : [];
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let params = options.conditionsParams ? options.conditionsParams.slice(0) : [];
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if (options.titlePattern) {
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let pattern = options.titlePattern.replace(/\*/g, '%');
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conditions.push('title LIKE ?');
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params.push(pattern);
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}
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if ('limit' in options && options.limit <= 0) return [];
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let sql = 'SELECT ' + this.db().escapeFields(options.fields) + ' FROM `' + this.tableName() + '`';
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if (conditions.length) sql += ' WHERE ' + conditions.join(' AND ');
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let query = this.applySqlOptions(options, sql, params);
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return this.modelSelectAll(query.sql, query.params);
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}
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static modelSelectOne(sql, params = null) {
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if (params === null) params = [];
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return this.db().selectOne(sql, params).then((model) => {
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return this.filter(this.addModelMd(model));
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});
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}
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static modelSelectAll(sql, params = null) {
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if (params === null) params = [];
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return this.db().selectAll(sql, params).then((models) => {
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return this.filterArray(this.addModelMd(models));
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});
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}
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static loadByField(fieldName, fieldValue, options = null) {
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if (!options) options = {};
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if (!('caseInsensitive' in options)) options.caseInsensitive = false;
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let sql = 'SELECT * FROM `' + this.tableName() + '` WHERE `' + fieldName + '` = ?';
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if (options.caseInsensitive) sql += ' COLLATE NOCASE';
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return this.modelSelectOne(sql, [fieldValue]);
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}
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static loadByTitle(fieldValue) {
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return this.modelSelectOne('SELECT * FROM `' + this.tableName() + '` WHERE `title` = ?', [fieldValue]);
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}
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static diffObjects(oldModel, newModel) {
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let output = {};
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const fields = this.diffObjectsFields(oldModel, newModel);
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for (let i = 0; i < fields.length; i++) {
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output[fields[i]] = newModel[fields[i]];
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}
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if ('type_' in newModel) output.type_ = newModel.type_;
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return output;
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}
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static diffObjectsFields(oldModel, newModel) {
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let output = [];
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for (let n in newModel) {
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if (!newModel.hasOwnProperty(n)) continue;
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if (n == 'type_') continue;
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if (!(n in oldModel) || newModel[n] !== oldModel[n]) {
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output.push(n);
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}
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}
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return output;
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}
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static modelsAreSame(oldModel, newModel) {
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const diff = this.diffObjects(oldModel, newModel);
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delete diff.type_;
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return !Object.getOwnPropertyNames(diff).length;
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}
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static saveMutex(modelOrId) {
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const noLockMutex = {
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acquire: function() { return null; }
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};
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if (!modelOrId) return noLockMutex;
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let modelId = typeof modelOrId === 'string' ? modelOrId : modelOrId.id;
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if (!modelId) return noLockMutex;
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let mutex = BaseModel.saveMutexes_[modelId];
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if (mutex) return mutex;
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mutex = new Mutex();
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BaseModel.saveMutexes_[modelId] = mutex;
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return mutex;
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}
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static releaseSaveMutex(modelOrId, release) {
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if (!release) return;
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if (!modelOrId) return release();
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let modelId = typeof modelOrId === 'string' ? modelOrId : modelOrId.id;
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if (!modelId) return release();
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let mutex = BaseModel.saveMutexes_[modelId];
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if (!mutex) return release();
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delete BaseModel.saveMutexes_[modelId];
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release();
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}
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static saveQuery(o, options) {
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let temp = {}
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let fieldNames = this.fieldNames();
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for (let i = 0; i < fieldNames.length; i++) {
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let n = fieldNames[i];
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if (n in o) temp[n] = o[n];
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}
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// Remove fields that are not in the `fields` list, if provided.
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// Note that things like update_time, user_update_time will still
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// be part of the final list of fields if autoTimestamp is on.
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// id also will stay.
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if (!options.isNew && options.fields) {
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const filtered = {};
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for (let k in temp) {
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if (!temp.hasOwnProperty(k)) continue;
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if (k !== 'id' && options.fields.indexOf(k) < 0) continue;
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filtered[k] = temp[k];
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}
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temp = filtered;
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}
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o = temp;
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let modelId = temp.id;
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let query = {};
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const timeNow = time.unixMs();
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if (options.autoTimestamp && this.hasField('updated_time')) {
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o.updated_time = timeNow;
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}
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// The purpose of user_updated_time is to allow the user to manually set the time of a note (in which case
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// options.autoTimestamp will be `false`). However note that if the item is later changed, this timestamp
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// will be set again to the current time.
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if (options.autoTimestamp && this.hasField('user_updated_time')) {
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o.user_updated_time = timeNow;
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}
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if (options.isNew) {
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if (this.useUuid() && !o.id) {
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modelId = uuid.create();
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o.id = modelId;
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}
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if (!o.created_time && this.hasField('created_time')) {
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o.created_time = timeNow;
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}
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if (!o.user_created_time && this.hasField('user_created_time')) {
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o.user_created_time = o.created_time ? o.created_time : timeNow;
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}
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if (!o.user_updated_time && this.hasField('user_updated_time')) {
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o.user_updated_time = o.updated_time ? o.updated_time : timeNow;
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}
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query = Database.insertQuery(this.tableName(), o);
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} else {
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let where = { id: o.id };
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let temp = Object.assign({}, o);
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delete temp.id;
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query = Database.updateQuery(this.tableName(), temp, where);
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}
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query.id = modelId;
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query.modObject = o;
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return query;
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}
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static async save(o, options = null) {
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// When saving, there's a mutex per model ID. This is because the model returned from this function
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// is basically its input `o` (instead of being read from the database, for performance reasons).
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// This works well in general except if that model is saved simultaneously in two places. In that
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// case, the output won't be up-to-date and would cause for example display issues with out-dated
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// notes being displayed. This was an issue when notes were being synchronised while being decrypted
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// at the same time.
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const mutexRelease = await this.saveMutex(o).acquire();
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options = this.modOptions(options);
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options.isNew = this.isNew(o, options);
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// Diff saving is an optimisation which takes a new version of the item and an old one,
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// do a diff and save only this diff. IMPORTANT: When using this make sure that both
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// models have been normalised using ItemClass.filter()
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const isDiffSaving = options && options.oldItem && !options.isNew;
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if (isDiffSaving) {
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const newObject = BaseModel.diffObjects(options.oldItem, o);
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newObject.type_ = o.type_;
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newObject.id = o.id;
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o = newObject;
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}
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o = this.filter(o);
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let queries = [];
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let saveQuery = this.saveQuery(o, options);
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let modelId = saveQuery.id;
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queries.push(saveQuery);
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if (options.nextQueries && options.nextQueries.length) {
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queries = queries.concat(options.nextQueries);
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}
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let output = null;
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try {
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await this.db().transactionExecBatch(queries);
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o = Object.assign({}, o);
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if (modelId) o.id = modelId;
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if ('updated_time' in saveQuery.modObject) o.updated_time = saveQuery.modObject.updated_time;
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if ('created_time' in saveQuery.modObject) o.created_time = saveQuery.modObject.created_time;
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if ('user_updated_time' in saveQuery.modObject) o.user_updated_time = saveQuery.modObject.user_updated_time;
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if ('user_created_time' in saveQuery.modObject) o.user_created_time = saveQuery.modObject.user_created_time;
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o = this.addModelMd(o);
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if (isDiffSaving) {
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for (let n in options.oldItem) {
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if (!options.oldItem.hasOwnProperty(n)) continue;
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if (n in o) continue;
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o[n] = options.oldItem[n];
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}
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}
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output = this.filter(o);
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} finally {
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this.releaseSaveMutex(o, mutexRelease);
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}
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return output;
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}
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static isNew(object, options) {
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if (options && ('isNew' in options)) {
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// options.isNew can be "auto" too
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if (options.isNew === true) return true;
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if (options.isNew === false) return false;
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}
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return !object.id;
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}
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static filterArray(models) {
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let output = [];
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for (let i = 0; i < models.length; i++) {
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output.push(this.filter(models[i]));
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}
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return output;
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}
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static filter(model) {
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if (!model) return model;
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let output = Object.assign({}, model);
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for (let n in output) {
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if (!output.hasOwnProperty(n)) continue;
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// The SQLite database doesn't have booleans so cast everything to int
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if (output[n] === true) {
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output[n] = 1;
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} else if (output[n] === false) {
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output[n] = 0;
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} else {
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const t = this.fieldType(n, Database.TYPE_UNKNOWN);
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if (t === Database.TYPE_INT) {
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output[n] = !n ? 0 : parseInt(output[n], 10);
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}
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}
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}
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return output;
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}
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static delete(id, options = null) {
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if (!id) throw new Error('Cannot delete object without an ID');
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options = this.modOptions(options);
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return this.db().exec('DELETE FROM ' + this.tableName() + ' WHERE id = ?', [id]);
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}
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static batchDelete(ids, options = null) {
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if (!ids.length) return;
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options = this.modOptions(options);
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return this.db().exec('DELETE FROM ' + this.tableName() + ' WHERE id IN ("' + ids.join('","') + '")');
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}
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static db() {
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if (!this.db_) throw new Error('Accessing database before it has been initialised');
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return this.db_;
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}
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static isReady() {
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return !!this.db_;
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}
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}
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BaseModel.typeEnum_ = [
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['TYPE_NOTE', 1],
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['TYPE_FOLDER', 2],
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['TYPE_SETTING', 3],
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['TYPE_RESOURCE', 4],
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['TYPE_TAG', 5],
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['TYPE_NOTE_TAG', 6],
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['TYPE_SEARCH', 7],
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['TYPE_ALARM', 8],
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['TYPE_MASTER_KEY', 9],
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['TYPE_ITEM_CHANGE', 10],
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['TYPE_NOTE_RESOURCE', 11],
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];
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for (let i = 0; i < BaseModel.typeEnum_.length; i++) {
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const e = BaseModel.typeEnum_[i];
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BaseModel[e[0]] = e[1];
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}
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BaseModel.db_ = null;
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BaseModel.dispatch = function(o) {};
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BaseModel.saveMutexes_ = {};
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module.exports = BaseModel; |