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import { createNode } from '../doc/createNode.js';
import { NodeBase, isNode, isPair, isCollection, isScalar } from './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(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 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 => isNode(it) || 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 (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 (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 && isScalar(node) ? node.value : node;
else
return isCollection(node) ? node.getIn(rest, keepScalar) : undefined;
}
hasAllNullValues(allowScalar) {
return this.items.every(node => {
if (!isPair(node))
return false;
const n = node.value;
return (n == null ||
(allowScalar &&
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 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 (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;
export { Collection, collectionFromPath, isEmptyPath };
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