332 lines
12 KiB
JavaScript
332 lines
12 KiB
JavaScript
import { Alias } from '../nodes/Alias.js';
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import { isEmptyPath, collectionFromPath } from '../nodes/Collection.js';
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import { NODE_TYPE, DOC, isNode, isCollection, isScalar } from '../nodes/Node.js';
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import { Pair } from '../nodes/Pair.js';
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import { toJS } from '../nodes/toJS.js';
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import { Schema } from '../schema/Schema.js';
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import { stringify } from '../stringify/stringify.js';
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import { stringifyDocument } from '../stringify/stringifyDocument.js';
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import { anchorNames, findNewAnchor, createNodeAnchors } from './anchors.js';
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import { applyReviver } from './applyReviver.js';
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import { createNode } from './createNode.js';
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import { Directives } from './directives.js';
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class Document {
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constructor(value, replacer, options) {
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/** A comment before this Document */
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this.commentBefore = null;
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/** A comment immediately after this Document */
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this.comment = null;
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/** Errors encountered during parsing. */
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this.errors = [];
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/** Warnings encountered during parsing. */
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this.warnings = [];
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Object.defineProperty(this, NODE_TYPE, { value: DOC });
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let _replacer = null;
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if (typeof replacer === 'function' || Array.isArray(replacer)) {
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_replacer = replacer;
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}
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else if (options === undefined && replacer) {
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options = replacer;
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replacer = undefined;
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}
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const opt = Object.assign({
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intAsBigInt: false,
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keepSourceTokens: false,
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logLevel: 'warn',
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prettyErrors: true,
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strict: true,
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uniqueKeys: true,
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version: '1.2'
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}, options);
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this.options = opt;
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let { version } = opt;
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if (options?._directives) {
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this.directives = options._directives.atDocument();
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if (this.directives.yaml.explicit)
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version = this.directives.yaml.version;
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}
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else
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this.directives = new Directives({ version });
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this.setSchema(version, options);
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if (value === undefined)
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this.contents = null;
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else {
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this.contents = this.createNode(value, _replacer, options);
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}
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}
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/**
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* Create a deep copy of this Document and its contents.
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*
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* Custom Node values that inherit from `Object` still refer to their original instances.
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*/
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clone() {
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const copy = Object.create(Document.prototype, {
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[NODE_TYPE]: { value: DOC }
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});
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copy.commentBefore = this.commentBefore;
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copy.comment = this.comment;
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copy.errors = this.errors.slice();
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copy.warnings = this.warnings.slice();
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copy.options = Object.assign({}, this.options);
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if (this.directives)
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copy.directives = this.directives.clone();
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copy.schema = this.schema.clone();
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copy.contents = isNode(this.contents)
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? this.contents.clone(copy.schema)
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: this.contents;
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if (this.range)
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copy.range = this.range.slice();
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return copy;
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}
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/** Adds a value to the document. */
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add(value) {
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if (assertCollection(this.contents))
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this.contents.add(value);
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}
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/** Adds a value to the document. */
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addIn(path, value) {
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if (assertCollection(this.contents))
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this.contents.addIn(path, value);
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}
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/**
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* Create a new `Alias` node, ensuring that the target `node` has the required anchor.
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*
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* If `node` already has an anchor, `name` is ignored.
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* Otherwise, the `node.anchor` value will be set to `name`,
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* or if an anchor with that name is already present in the document,
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* `name` will be used as a prefix for a new unique anchor.
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* If `name` is undefined, the generated anchor will use 'a' as a prefix.
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*/
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createAlias(node, name) {
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if (!node.anchor) {
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const prev = anchorNames(this);
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node.anchor =
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// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
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!name || prev.has(name) ? findNewAnchor(name || 'a', prev) : name;
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}
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return new Alias(node.anchor);
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}
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createNode(value, replacer, options) {
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let _replacer = undefined;
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if (typeof replacer === 'function') {
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value = replacer.call({ '': value }, '', value);
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_replacer = replacer;
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}
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else if (Array.isArray(replacer)) {
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const keyToStr = (v) => typeof v === 'number' || v instanceof String || v instanceof Number;
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const asStr = replacer.filter(keyToStr).map(String);
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if (asStr.length > 0)
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replacer = replacer.concat(asStr);
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_replacer = replacer;
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}
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else if (options === undefined && replacer) {
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options = replacer;
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replacer = undefined;
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}
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const { aliasDuplicateObjects, anchorPrefix, flow, keepUndefined, onTagObj, tag } = options ?? {};
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const { onAnchor, setAnchors, sourceObjects } = createNodeAnchors(this,
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// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
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anchorPrefix || 'a');
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const ctx = {
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aliasDuplicateObjects: aliasDuplicateObjects ?? true,
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keepUndefined: keepUndefined ?? false,
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onAnchor,
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onTagObj,
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replacer: _replacer,
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schema: this.schema,
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sourceObjects
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};
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const node = createNode(value, tag, ctx);
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if (flow && isCollection(node))
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node.flow = true;
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setAnchors();
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return node;
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}
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/**
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* Convert a key and a value into a `Pair` using the current schema,
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* recursively wrapping all values as `Scalar` or `Collection` nodes.
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*/
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createPair(key, value, options = {}) {
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const k = this.createNode(key, null, options);
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const v = this.createNode(value, null, options);
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return new Pair(k, v);
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}
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/**
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* Removes a value from the document.
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* @returns `true` if the item was found and removed.
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*/
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delete(key) {
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return assertCollection(this.contents) ? this.contents.delete(key) : false;
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}
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/**
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* Removes a value from the document.
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* @returns `true` if the item was found and removed.
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*/
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deleteIn(path) {
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if (isEmptyPath(path)) {
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if (this.contents == null)
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return false;
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this.contents = null;
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return true;
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}
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return assertCollection(this.contents)
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? this.contents.deleteIn(path)
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: false;
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}
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/**
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* Returns item at `key`, or `undefined` if not found. By default unwraps
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* scalar values from their surrounding node; to disable set `keepScalar` to
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* `true` (collections are always returned intact).
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*/
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get(key, keepScalar) {
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return isCollection(this.contents)
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? this.contents.get(key, keepScalar)
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: undefined;
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}
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/**
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* Returns item at `path`, or `undefined` if not found. By default unwraps
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* scalar values from their surrounding node; to disable set `keepScalar` to
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* `true` (collections are always returned intact).
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*/
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getIn(path, keepScalar) {
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if (isEmptyPath(path))
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return !keepScalar && isScalar(this.contents)
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? this.contents.value
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: this.contents;
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return isCollection(this.contents)
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? this.contents.getIn(path, keepScalar)
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: undefined;
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}
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/**
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* Checks if the document includes a value with the key `key`.
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*/
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has(key) {
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return isCollection(this.contents) ? this.contents.has(key) : false;
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}
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/**
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* Checks if the document includes a value at `path`.
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*/
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hasIn(path) {
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if (isEmptyPath(path))
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return this.contents !== undefined;
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return isCollection(this.contents) ? this.contents.hasIn(path) : false;
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}
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/**
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* Sets a value in this document. For `!!set`, `value` needs to be a
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* boolean to add/remove the item from the set.
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*/
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set(key, value) {
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if (this.contents == null) {
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this.contents = collectionFromPath(this.schema, [key], value);
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}
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else if (assertCollection(this.contents)) {
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this.contents.set(key, value);
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}
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}
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/**
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* Sets a value in this document. For `!!set`, `value` needs to be a
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* boolean to add/remove the item from the set.
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*/
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setIn(path, value) {
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if (isEmptyPath(path))
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this.contents = value;
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else if (this.contents == null) {
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this.contents = collectionFromPath(this.schema, Array.from(path), value);
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}
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else if (assertCollection(this.contents)) {
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this.contents.setIn(path, value);
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}
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}
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/**
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* Change the YAML version and schema used by the document.
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* A `null` version disables support for directives, explicit tags, anchors, and aliases.
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* It also requires the `schema` option to be given as a `Schema` instance value.
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*
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* Overrides all previously set schema options.
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*/
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setSchema(version, options = {}) {
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if (typeof version === 'number')
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version = String(version);
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let opt;
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switch (version) {
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case '1.1':
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if (this.directives)
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this.directives.yaml.version = '1.1';
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else
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this.directives = new Directives({ version: '1.1' });
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opt = { merge: true, resolveKnownTags: false, schema: 'yaml-1.1' };
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break;
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case '1.2':
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case 'next':
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if (this.directives)
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this.directives.yaml.version = version;
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else
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this.directives = new Directives({ version });
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opt = { merge: false, resolveKnownTags: true, schema: 'core' };
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break;
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case null:
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if (this.directives)
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delete this.directives;
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opt = null;
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break;
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default: {
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const sv = JSON.stringify(version);
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throw new Error(`Expected '1.1', '1.2' or null as first argument, but found: ${sv}`);
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}
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}
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// Not using `instanceof Schema` to allow for duck typing
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if (options.schema instanceof Object)
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this.schema = options.schema;
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else if (opt)
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this.schema = new Schema(Object.assign(opt, options));
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else
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throw new Error(`With a null YAML version, the { schema: Schema } option is required`);
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}
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// json & jsonArg are only used from toJSON()
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toJS({ json, jsonArg, mapAsMap, maxAliasCount, onAnchor, reviver } = {}) {
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const ctx = {
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anchors: new Map(),
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doc: this,
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keep: !json,
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mapAsMap: mapAsMap === true,
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mapKeyWarned: false,
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maxAliasCount: typeof maxAliasCount === 'number' ? maxAliasCount : 100,
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stringify
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};
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const res = toJS(this.contents, jsonArg ?? '', ctx);
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if (typeof onAnchor === 'function')
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for (const { count, res } of ctx.anchors.values())
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onAnchor(res, count);
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return typeof reviver === 'function'
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? applyReviver(reviver, { '': res }, '', res)
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: res;
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}
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/**
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* A JSON representation of the document `contents`.
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*
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* @param jsonArg Used by `JSON.stringify` to indicate the array index or
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* property name.
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*/
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toJSON(jsonArg, onAnchor) {
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return this.toJS({ json: true, jsonArg, mapAsMap: false, onAnchor });
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}
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/** A YAML representation of the document. */
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toString(options = {}) {
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if (this.errors.length > 0)
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throw new Error('Document with errors cannot be stringified');
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if ('indent' in options &&
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(!Number.isInteger(options.indent) || Number(options.indent) <= 0)) {
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const s = JSON.stringify(options.indent);
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throw new Error(`"indent" option must be a positive integer, not ${s}`);
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}
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return stringifyDocument(this, options);
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}
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}
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function assertCollection(contents) {
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if (isCollection(contents))
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return true;
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throw new Error('Expected a YAML collection as document contents');
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}
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export { Document };
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