import { stringifyCollection } from '../stringify/stringifyCollection.js'; import { Collection } from './Collection.js'; import { SEQ, isScalar } from './Node.js'; import { isScalarValue } from './Scalar.js'; import { toJS } from './toJS.js'; class YAMLSeq extends Collection { constructor(schema) { super(SEQ, schema); this.items = []; } static get tagName() { return 'tag:yaml.org,2002:seq'; } add(value) { this.items.push(value); } /** * Removes a value from the collection. * * `key` must contain a representation of an integer for this to succeed. * It may be wrapped in a `Scalar`. * * @returns `true` if the item was found and removed. */ delete(key) { const idx = asItemIndex(key); if (typeof idx !== 'number') return false; const del = this.items.splice(idx, 1); return del.length > 0; } get(key, keepScalar) { const idx = asItemIndex(key); if (typeof idx !== 'number') return undefined; const it = this.items[idx]; return !keepScalar && isScalar(it) ? it.value : it; } /** * Checks if the collection includes a value with the key `key`. * * `key` must contain a representation of an integer for this to succeed. * It may be wrapped in a `Scalar`. */ has(key) { const idx = asItemIndex(key); return typeof idx === 'number' && idx < this.items.length; } /** * Sets a value in this collection. For `!!set`, `value` needs to be a * boolean to add/remove the item from the set. * * If `key` does not contain a representation of an integer, this will throw. * It may be wrapped in a `Scalar`. */ set(key, value) { const idx = asItemIndex(key); if (typeof idx !== 'number') throw new Error(`Expected a valid index, not ${key}.`); const prev = this.items[idx]; if (isScalar(prev) && isScalarValue(value)) prev.value = value; else this.items[idx] = value; } toJSON(_, ctx) { const seq = []; if (ctx?.onCreate) ctx.onCreate(seq); let i = 0; for (const item of this.items) seq.push(toJS(item, String(i++), ctx)); return seq; } toString(ctx, onComment, onChompKeep) { if (!ctx) return JSON.stringify(this); return stringifyCollection(this, ctx, { blockItemPrefix: '- ', flowChars: { start: '[', end: ']' }, itemIndent: (ctx.indent || '') + ' ', onChompKeep, onComment }); } } function asItemIndex(key) { let idx = isScalar(key) ? key.value : key; if (idx && typeof idx === 'string') idx = Number(idx); return typeof idx === 'number' && Number.isInteger(idx) && idx >= 0 ? idx : null; } export { YAMLSeq };