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<h1 class="page-title">Source: entities/branch.js</h1>
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<pre class="prettyprint source linenums"><code>"use strict";
const Entity = require('./entity');
const dateUtils = require('../services/date_utils');
const sql = require('../services/sql');
/**
* Branch represents note's placement in the tree - it's essentially pair of noteId and parentNoteId.
* Each note can have multiple (at least one) branches, meaning it can be placed into multiple places in the tree.
*
* @property {string} branchId - primary key, immutable
* @property {string} noteId - immutable
* @property {string} parentNoteId - immutable
* @property {int} notePosition
* @property {string} prefix
* @property {boolean} isExpanded
* @property {boolean} isDeleted
* @property {string|null} deleteId - ID identifying delete transaction
* @property {string} utcDateModified
* @property {string} utcDateCreated
*
* @extends Entity
*/
class Branch extends Entity {
static get entityName() { return "branches"; }
static get primaryKeyName() { return "branchId"; }
// notePosition is not part of hash because it would produce a lot of updates in case of reordering
static get hashedProperties() { return ["branchId", "noteId", "parentNoteId", "isDeleted", "deleteId", "prefix"]; }
/** @returns {Note|null} */
getNote() {
return this.repository.getNote(this.noteId);
}
/** @returns {Note|null} */
getParentNote() {
return this.repository.getNote(this.parentNoteId);
}
beforeSaving() {
if (this.notePosition === undefined || this.notePosition === null) {
const maxNotePos = sql.getValue('SELECT MAX(notePosition) FROM branches WHERE parentNoteId = ? AND isDeleted = 0', [this.parentNoteId]);
this.notePosition = maxNotePos === null ? 0 : maxNotePos + 10;
}
if (!this.isExpanded) {
this.isExpanded = false;
}
if (!this.isDeleted) {
this.isDeleted = false;
}
if (!this.utcDateCreated) {
this.utcDateCreated = dateUtils.utcNowDateTime();
}
super.beforeSaving();
this.utcDateModified = dateUtils.utcNowDateTime();
}
createClone(parentNoteId, notePosition) {
return new Branch({
noteId: this.noteId,
parentNoteId: parentNoteId,
notePosition: notePosition,
prefix: this.prefix,
isExpanded: this.isExpanded,
isDeleted: false,
utcDateCreated: this.utcDateCreated,
utcDateModified: this.utcDateModified
});
}
}
module.exports = Branch;
</code></pre>
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