'use strict'; var createNode = require('../doc/createNode.js'); var Node = require('./Node.js'); function collectionFromPath(schema, path, value) { let v = value; for (let i = path.length - 1; i >= 0; --i) { const k = path[i]; if (typeof k === 'number' && Number.isInteger(k) && k >= 0) { const a = []; a[k] = v; v = a; } else { v = new Map([[k, v]]); } } return createNode.createNode(v, undefined, { aliasDuplicateObjects: false, keepUndefined: false, onAnchor: () => { throw new Error('This should not happen, please report a bug.'); }, schema, sourceObjects: new Map() }); } // Type guard is intentionally a little wrong so as to be more useful, // as it does not cover untypable empty non-string iterables (e.g. []). const isEmptyPath = (path) => path == null || (typeof path === 'object' && !!path[Symbol.iterator]().next().done); class Collection extends Node.NodeBase { constructor(type, schema) { super(type); Object.defineProperty(this, 'schema', { value: schema, configurable: true, enumerable: false, writable: true }); } /** * Create a copy of this collection. * * @param schema - If defined, overwrites the original's schema */ clone(schema) { const copy = Object.create(Object.getPrototypeOf(this), Object.getOwnPropertyDescriptors(this)); if (schema) copy.schema = schema; copy.items = copy.items.map(it => Node.isNode(it) || Node.isPair(it) ? it.clone(schema) : it); if (this.range) copy.range = this.range.slice(); return copy; } /** * Adds a value to the collection. For `!!map` and `!!omap` the value must * be a Pair instance or a `{ key, value }` object, which may not have a key * that already exists in the map. */ addIn(path, value) { if (isEmptyPath(path)) this.add(value); else { const [key, ...rest] = path; const node = this.get(key, true); if (Node.isCollection(node)) node.addIn(rest, value); else if (node === undefined && this.schema) this.set(key, collectionFromPath(this.schema, rest, value)); else throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`); } } /** * Removes a value from the collection. * @returns `true` if the item was found and removed. */ deleteIn(path) { const [key, ...rest] = path; if (rest.length === 0) return this.delete(key); const node = this.get(key, true); if (Node.isCollection(node)) return node.deleteIn(rest); else throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`); } /** * Returns item at `key`, or `undefined` if not found. By default unwraps * scalar values from their surrounding node; to disable set `keepScalar` to * `true` (collections are always returned intact). */ getIn(path, keepScalar) { const [key, ...rest] = path; const node = this.get(key, true); if (rest.length === 0) return !keepScalar && Node.isScalar(node) ? node.value : node; else return Node.isCollection(node) ? node.getIn(rest, keepScalar) : undefined; } hasAllNullValues(allowScalar) { return this.items.every(node => { if (!Node.isPair(node)) return false; const n = node.value; return (n == null || (allowScalar && Node.isScalar(n) && n.value == null && !n.commentBefore && !n.comment && !n.tag)); }); } /** * Checks if the collection includes a value with the key `key`. */ hasIn(path) { const [key, ...rest] = path; if (rest.length === 0) return this.has(key); const node = this.get(key, true); return Node.isCollection(node) ? node.hasIn(rest) : false; } /** * Sets a value in this collection. For `!!set`, `value` needs to be a * boolean to add/remove the item from the set. */ setIn(path, value) { const [key, ...rest] = path; if (rest.length === 0) { this.set(key, value); } else { const node = this.get(key, true); if (Node.isCollection(node)) node.setIn(rest, value); else if (node === undefined && this.schema) this.set(key, collectionFromPath(this.schema, rest, value)); else throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`); } } } Collection.maxFlowStringSingleLineLength = 60; exports.Collection = Collection; exports.collectionFromPath = collectionFromPath; exports.isEmptyPath = isEmptyPath;