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✏️ Editing: cst-scalar.js

'use strict';

var resolveBlockScalar = require('../compose/resolve-block-scalar.js');
var resolveFlowScalar = require('../compose/resolve-flow-scalar.js');
var errors = require('../errors.js');
var stringifyString = require('../stringify/stringifyString.js');

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

exports.createScalarToken = createScalarToken;
exports.resolveAsScalar = resolveAsScalar;
exports.setScalarValue = setScalarValue;

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