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Filename : resolve-flow-collection.js
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'use strict';

var identity = require('../nodes/identity.js');
var Pair = require('../nodes/Pair.js');
var YAMLMap = require('../nodes/YAMLMap.js');
var YAMLSeq = require('../nodes/YAMLSeq.js');
var resolveEnd = require('./resolve-end.js');
var resolveProps = require('./resolve-props.js');
var utilContainsNewline = require('./util-contains-newline.js');
var utilMapIncludes = require('./util-map-includes.js');

const blockMsg = 'Block collections are not allowed within flow collections';
const isBlock = (token) => token && (token.type === 'block-map' || token.type === 'block-seq');
function resolveFlowCollection({ composeNode, composeEmptyNode }, ctx, fc, onError, tag) {
    const isMap = fc.start.source === '{';
    const fcName = isMap ? 'flow map' : 'flow sequence';
    const NodeClass = (tag?.nodeClass ?? (isMap ? YAMLMap.YAMLMap : YAMLSeq.YAMLSeq));
    const coll = new NodeClass(ctx.schema);
    coll.flow = true;
    const atRoot = ctx.atRoot;
    if (atRoot)
        ctx.atRoot = false;
    let offset = fc.offset + fc.start.source.length;
    for (let i = 0; i < fc.items.length; ++i) {
        const collItem = fc.items[i];
        const { start, key, sep, value } = collItem;
        const props = resolveProps.resolveProps(start, {
            flow: fcName,
            indicator: 'explicit-key-ind',
            next: key ?? sep?.[0],
            offset,
            onError,
            parentIndent: fc.indent,
            startOnNewline: false
        });
        if (!props.found) {
            if (!props.anchor && !props.tag && !sep && !value) {
                if (i === 0 && props.comma)
                    onError(props.comma, 'UNEXPECTED_TOKEN', `Unexpected , in ${fcName}`);
                else if (i < fc.items.length - 1)
                    onError(props.start, 'UNEXPECTED_TOKEN', `Unexpected empty item in ${fcName}`);
                if (props.comment) {
                    if (coll.comment)
                        coll.comment += '\n' + props.comment;
                    else
                        coll.comment = props.comment;
                }
                offset = props.end;
                continue;
            }
            if (!isMap && ctx.options.strict && utilContainsNewline.containsNewline(key))
                onError(key, // checked by containsNewline()
                'MULTILINE_IMPLICIT_KEY', 'Implicit keys of flow sequence pairs need to be on a single line');
        }
        if (i === 0) {
            if (props.comma)
                onError(props.comma, 'UNEXPECTED_TOKEN', `Unexpected , in ${fcName}`);
        }
        else {
            if (!props.comma)
                onError(props.start, 'MISSING_CHAR', `Missing , between ${fcName} items`);
            if (props.comment) {
                let prevItemComment = '';
                loop: for (const st of start) {
                    switch (st.type) {
                        case 'comma':
                        case 'space':
                            break;
                        case 'comment':
                            prevItemComment = st.source.substring(1);
                            break loop;
                        default:
                            break loop;
                    }
                }
                if (prevItemComment) {
                    let prev = coll.items[coll.items.length - 1];
                    if (identity.isPair(prev))
                        prev = prev.value ?? prev.key;
                    if (prev.comment)
                        prev.comment += '\n' + prevItemComment;
                    else
                        prev.comment = prevItemComment;
                    props.comment = props.comment.substring(prevItemComment.length + 1);
                }
            }
        }
        if (!isMap && !sep && !props.found) {
            // item is a value in a seq
            // → key & sep are empty, start does not include ? or :
            const valueNode = value
                ? composeNode(ctx, value, props, onError)
                : composeEmptyNode(ctx, props.end, sep, null, props, onError);
            coll.items.push(valueNode);
            offset = valueNode.range[2];
            if (isBlock(value))
                onError(valueNode.range, 'BLOCK_IN_FLOW', blockMsg);
        }
        else {
            // item is a key+value pair
            // key value
            const keyStart = props.end;
            const keyNode = key
                ? composeNode(ctx, key, props, onError)
                : composeEmptyNode(ctx, keyStart, start, null, props, onError);
            if (isBlock(key))
                onError(keyNode.range, 'BLOCK_IN_FLOW', blockMsg);
            // value properties
            const valueProps = resolveProps.resolveProps(sep ?? [], {
                flow: fcName,
                indicator: 'map-value-ind',
                next: value,
                offset: keyNode.range[2],
                onError,
                parentIndent: fc.indent,
                startOnNewline: false
            });
            if (valueProps.found) {
                if (!isMap && !props.found && ctx.options.strict) {
                    if (sep)
                        for (const st of sep) {
                            if (st === valueProps.found)
                                break;
                            if (st.type === 'newline') {
                                onError(st, 'MULTILINE_IMPLICIT_KEY', 'Implicit keys of flow sequence pairs need to be on a single line');
                                break;
                            }
                        }
                    if (props.start < valueProps.found.offset - 1024)
                        onError(valueProps.found, 'KEY_OVER_1024_CHARS', 'The : indicator must be at most 1024 chars after the start of an implicit flow sequence key');
                }
            }
            else if (value) {
                if ('source' in value && value.source && value.source[0] === ':')
                    onError(value, 'MISSING_CHAR', `Missing space after : in ${fcName}`);
                else
                    onError(valueProps.start, 'MISSING_CHAR', `Missing , or : between ${fcName} items`);
            }
            // value value
            const valueNode = value
                ? composeNode(ctx, value, valueProps, onError)
                : valueProps.found
                    ? composeEmptyNode(ctx, valueProps.end, sep, null, valueProps, onError)
                    : null;
            if (valueNode) {
                if (isBlock(value))
                    onError(valueNode.range, 'BLOCK_IN_FLOW', blockMsg);
            }
            else if (valueProps.comment) {
                if (keyNode.comment)
                    keyNode.comment += '\n' + valueProps.comment;
                else
                    keyNode.comment = valueProps.comment;
            }
            const pair = new Pair.Pair(keyNode, valueNode);
            if (ctx.options.keepSourceTokens)
                pair.srcToken = collItem;
            if (isMap) {
                const map = coll;
                if (utilMapIncludes.mapIncludes(ctx, map.items, keyNode))
                    onError(keyStart, 'DUPLICATE_KEY', 'Map keys must be unique');
                map.items.push(pair);
            }
            else {
                const map = new YAMLMap.YAMLMap(ctx.schema);
                map.flow = true;
                map.items.push(pair);
                coll.items.push(map);
            }
            offset = valueNode ? valueNode.range[2] : valueProps.end;
        }
    }
    const expectedEnd = isMap ? '}' : ']';
    const [ce, ...ee] = fc.end;
    let cePos = offset;
    if (ce && ce.source === expectedEnd)
        cePos = ce.offset + ce.source.length;
    else {
        const name = fcName[0].toUpperCase() + fcName.substring(1);
        const msg = atRoot
            ? `${name} must end with a ${expectedEnd}`
            : `${name} in block collection must be sufficiently indented and end with a ${expectedEnd}`;
        onError(offset, atRoot ? 'MISSING_CHAR' : 'BAD_INDENT', msg);
        if (ce && ce.source.length !== 1)
            ee.unshift(ce);
    }
    if (ee.length > 0) {
        const end = resolveEnd.resolveEnd(ee, cePos, ctx.options.strict, onError);
        if (end.comment) {
            if (coll.comment)
                coll.comment += '\n' + end.comment;
            else
                coll.comment = end.comment;
        }
        coll.range = [fc.offset, cePos, end.offset];
    }
    else {
        coll.range = [fc.offset, cePos, cePos];
    }
    return coll;
}

exports.resolveFlowCollection = resolveFlowCollection;