forked from Fediversity/fediversity.eu
215 lines
9 KiB
JavaScript
215 lines
9 KiB
JavaScript
import { resolveBlockScalar } from '../compose/resolve-block-scalar.js';
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import { resolveFlowScalar } from '../compose/resolve-flow-scalar.js';
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import { YAMLParseError } from '../errors.js';
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import { stringifyString } from '../stringify/stringifyString.js';
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function resolveAsScalar(token, strict = true, onError) {
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if (token) {
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const _onError = (pos, code, message) => {
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const offset = typeof pos === 'number' ? pos : Array.isArray(pos) ? pos[0] : pos.offset;
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if (onError)
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onError(offset, code, message);
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else
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throw new YAMLParseError([offset, offset + 1], code, message);
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};
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switch (token.type) {
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case 'scalar':
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case 'single-quoted-scalar':
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case 'double-quoted-scalar':
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return resolveFlowScalar(token, strict, _onError);
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case 'block-scalar':
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return resolveBlockScalar(token, strict, _onError);
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}
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}
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return null;
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}
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/**
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* Create a new scalar token with `value`
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*
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* Values that represent an actual string but may be parsed as a different type should use a `type` other than `'PLAIN'`,
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* as this function does not support any schema operations and won't check for such conflicts.
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*
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* @param value The string representation of the value, which will have its content properly indented.
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* @param context.end Comments and whitespace after the end of the value, or after the block scalar header. If undefined, a newline will be added.
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* @param context.implicitKey Being within an implicit key may affect the resolved type of the token's value.
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* @param context.indent The indent level of the token.
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* @param context.inFlow Is this scalar within a flow collection? This may affect the resolved type of the token's value.
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* @param context.offset The offset position of the token.
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* @param context.type The preferred type of the scalar token. If undefined, the previous type of the `token` will be used, defaulting to `'PLAIN'`.
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*/
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function createScalarToken(value, context) {
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const { implicitKey = false, indent, inFlow = false, offset = -1, type = 'PLAIN' } = context;
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const source = stringifyString({ type, value }, {
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implicitKey,
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indent: indent > 0 ? ' '.repeat(indent) : '',
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inFlow,
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options: { blockQuote: true, lineWidth: -1 }
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});
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const end = context.end ?? [
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{ type: 'newline', offset: -1, indent, source: '\n' }
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];
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switch (source[0]) {
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case '|':
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case '>': {
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const he = source.indexOf('\n');
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const head = source.substring(0, he);
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const body = source.substring(he + 1) + '\n';
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const props = [
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{ type: 'block-scalar-header', offset, indent, source: head }
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];
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if (!addEndtoBlockProps(props, end))
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props.push({ type: 'newline', offset: -1, indent, source: '\n' });
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return { type: 'block-scalar', offset, indent, props, source: body };
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}
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case '"':
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return { type: 'double-quoted-scalar', offset, indent, source, end };
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case "'":
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return { type: 'single-quoted-scalar', offset, indent, source, end };
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default:
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return { type: 'scalar', offset, indent, source, end };
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}
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}
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/**
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* Set the value of `token` to the given string `value`, overwriting any previous contents and type that it may have.
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*
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* Best efforts are made to retain any comments previously associated with the `token`,
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* though all contents within a collection's `items` will be overwritten.
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*
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* Values that represent an actual string but may be parsed as a different type should use a `type` other than `'PLAIN'`,
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* as this function does not support any schema operations and won't check for such conflicts.
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*
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* @param token Any token. If it does not include an `indent` value, the value will be stringified as if it were an implicit key.
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* @param value The string representation of the value, which will have its content properly indented.
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* @param context.afterKey In most cases, values after a key should have an additional level of indentation.
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* @param context.implicitKey Being within an implicit key may affect the resolved type of the token's value.
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* @param context.inFlow Being within a flow collection may affect the resolved type of the token's value.
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* @param context.type The preferred type of the scalar token. If undefined, the previous type of the `token` will be used, defaulting to `'PLAIN'`.
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*/
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function setScalarValue(token, value, context = {}) {
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let { afterKey = false, implicitKey = false, inFlow = false, type } = context;
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let indent = 'indent' in token ? token.indent : null;
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if (afterKey && typeof indent === 'number')
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indent += 2;
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if (!type)
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switch (token.type) {
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case 'single-quoted-scalar':
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type = 'QUOTE_SINGLE';
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break;
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case 'double-quoted-scalar':
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type = 'QUOTE_DOUBLE';
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break;
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case 'block-scalar': {
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const header = token.props[0];
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if (header.type !== 'block-scalar-header')
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throw new Error('Invalid block scalar header');
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type = header.source[0] === '>' ? 'BLOCK_FOLDED' : 'BLOCK_LITERAL';
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break;
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}
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default:
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type = 'PLAIN';
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}
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const source = stringifyString({ type, value }, {
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implicitKey: implicitKey || indent === null,
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indent: indent !== null && indent > 0 ? ' '.repeat(indent) : '',
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inFlow,
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options: { blockQuote: true, lineWidth: -1 }
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});
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switch (source[0]) {
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case '|':
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case '>':
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setBlockScalarValue(token, source);
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break;
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case '"':
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setFlowScalarValue(token, source, 'double-quoted-scalar');
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break;
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case "'":
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setFlowScalarValue(token, source, 'single-quoted-scalar');
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break;
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default:
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setFlowScalarValue(token, source, 'scalar');
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}
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}
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function setBlockScalarValue(token, source) {
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const he = source.indexOf('\n');
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const head = source.substring(0, he);
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const body = source.substring(he + 1) + '\n';
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if (token.type === 'block-scalar') {
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const header = token.props[0];
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if (header.type !== 'block-scalar-header')
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throw new Error('Invalid block scalar header');
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header.source = head;
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token.source = body;
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}
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else {
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const { offset } = token;
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const indent = 'indent' in token ? token.indent : -1;
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const props = [
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{ type: 'block-scalar-header', offset, indent, source: head }
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];
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if (!addEndtoBlockProps(props, 'end' in token ? token.end : undefined))
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props.push({ type: 'newline', offset: -1, indent, source: '\n' });
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for (const key of Object.keys(token))
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if (key !== 'type' && key !== 'offset')
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delete token[key];
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Object.assign(token, { type: 'block-scalar', indent, props, source: body });
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}
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}
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/** @returns `true` if last token is a newline */
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function addEndtoBlockProps(props, end) {
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if (end)
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for (const st of end)
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switch (st.type) {
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case 'space':
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case 'comment':
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props.push(st);
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break;
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case 'newline':
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props.push(st);
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return true;
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}
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return false;
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}
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function setFlowScalarValue(token, source, type) {
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switch (token.type) {
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case 'scalar':
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case 'double-quoted-scalar':
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case 'single-quoted-scalar':
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token.type = type;
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token.source = source;
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break;
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case 'block-scalar': {
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const end = token.props.slice(1);
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let oa = source.length;
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if (token.props[0].type === 'block-scalar-header')
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oa -= token.props[0].source.length;
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for (const tok of end)
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tok.offset += oa;
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delete token.props;
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Object.assign(token, { type, source, end });
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break;
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}
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case 'block-map':
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case 'block-seq': {
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const offset = token.offset + source.length;
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const nl = { type: 'newline', offset, indent: token.indent, source: '\n' };
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delete token.items;
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Object.assign(token, { type, source, end: [nl] });
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break;
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}
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default: {
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const indent = 'indent' in token ? token.indent : -1;
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const end = 'end' in token && Array.isArray(token.end)
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? token.end.filter(st => st.type === 'space' ||
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st.type === 'comment' ||
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st.type === 'newline')
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: [];
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for (const key of Object.keys(token))
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if (key !== 'type' && key !== 'offset')
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delete token[key];
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Object.assign(token, { type, indent, source, end });
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}
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}
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}
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export { createScalarToken, resolveAsScalar, setScalarValue };
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