pairs.js•2.75 kB
import { isSeq, isPair, isMap } from '../../nodes/identity.js';
import { Pair, createPair } from '../../nodes/Pair.js';
import { Scalar } from '../../nodes/Scalar.js';
import { YAMLSeq } from '../../nodes/YAMLSeq.js';
function resolvePairs(seq, onError) {
if (isSeq(seq)) {
for (let i = 0; i < seq.items.length; ++i) {
let item = seq.items[i];
if (isPair(item))
continue;
else if (isMap(item)) {
if (item.items.length > 1)
onError('Each pair must have its own sequence indicator');
const pair = item.items[0] || new Pair(new Scalar(null));
if (item.commentBefore)
pair.key.commentBefore = pair.key.commentBefore
? `${item.commentBefore}\n${pair.key.commentBefore}`
: item.commentBefore;
if (item.comment) {
const cn = pair.value ?? pair.key;
cn.comment = cn.comment
? `${item.comment}\n${cn.comment}`
: item.comment;
}
item = pair;
}
seq.items[i] = isPair(item) ? item : new Pair(item);
}
}
else
onError('Expected a sequence for this tag');
return seq;
}
function createPairs(schema, iterable, ctx) {
const { replacer } = ctx;
const pairs = new YAMLSeq(schema);
pairs.tag = 'tag:yaml.org,2002:pairs';
let i = 0;
if (iterable && Symbol.iterator in Object(iterable))
for (let it of iterable) {
if (typeof replacer === 'function')
it = replacer.call(iterable, String(i++), it);
let key, value;
if (Array.isArray(it)) {
if (it.length === 2) {
key = it[0];
value = it[1];
}
else
throw new TypeError(`Expected [key, value] tuple: ${it}`);
}
else if (it && it instanceof Object) {
const keys = Object.keys(it);
if (keys.length === 1) {
key = keys[0];
value = it[key];
}
else {
throw new TypeError(`Expected tuple with one key, not ${keys.length} keys`);
}
}
else {
key = it;
}
pairs.items.push(createPair(key, value, ctx));
}
return pairs;
}
const pairs = {
collection: 'seq',
default: false,
tag: 'tag:yaml.org,2002:pairs',
resolve: resolvePairs,
createNode: createPairs
};
export { createPairs, pairs, resolvePairs };