Add node_modules

node_modules/yaml/browser/dist/stringify/foldFlowLines.js

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+const FOLD_FLOW = 'flow';
+const FOLD_BLOCK = 'block';
+const FOLD_QUOTED = 'quoted';
+/**
+ * Tries to keep input at up to `lineWidth` characters, splitting only on spaces
+ * not followed by newlines or spaces unless `mode` is `'quoted'`. Lines are
+ * terminated with `\n` and started with `indent`.
+ */
+function foldFlowLines(text, indent, mode = 'flow', { indentAtStart, lineWidth = 80, minContentWidth = 20, onFold, onOverflow } = {}) {
+    if (!lineWidth || lineWidth < 0)
+        return text;
+    const endStep = Math.max(1 + minContentWidth, 1 + lineWidth - indent.length);
+    if (text.length <= endStep)
+        return text;
+    const folds = [];
+    const escapedFolds = {};
+    let end = lineWidth - indent.length;
+    if (typeof indentAtStart === 'number') {
+        if (indentAtStart > lineWidth - Math.max(2, minContentWidth))
+            folds.push(0);
+        else
+            end = lineWidth - indentAtStart;
+    }
+    let split = undefined;
+    let prev = undefined;
+    let overflow = false;
+    let i = -1;
+    let escStart = -1;
+    let escEnd = -1;
+    if (mode === FOLD_BLOCK) {
+        i = consumeMoreIndentedLines(text, i);
+        if (i !== -1)
+            end = i + endStep;
+    }
+    for (let ch; (ch = text[(i += 1)]);) {
+        if (mode === FOLD_QUOTED && ch === '\\') {
+            escStart = i;
+            switch (text[i + 1]) {
+                case 'x':
+                    i += 3;
+                    break;
+                case 'u':
+                    i += 5;
+                    break;
+                case 'U':
+                    i += 9;
+                    break;
+                default:
+                    i += 1;
+            }
+            escEnd = i;
+        }
+        if (ch === '\n') {
+            if (mode === FOLD_BLOCK)
+                i = consumeMoreIndentedLines(text, i);
+            end = i + endStep;
+            split = undefined;
+        }
+        else {
+            if (ch === ' ' &&
+                prev &&
+                prev !== ' ' &&
+                prev !== '\n' &&
+                prev !== '\t') {
+                // space surrounded by non-space can be replaced with newline + indent
+                const next = text[i + 1];
+                if (next && next !== ' ' && next !== '\n' && next !== '\t')
+                    split = i;
+            }
+            if (i >= end) {
+                if (split) {
+                    folds.push(split);
+                    end = split + endStep;
+                    split = undefined;
+                }
+                else if (mode === FOLD_QUOTED) {
+                    // white-space collected at end may stretch past lineWidth
+                    while (prev === ' ' || prev === '\t') {
+                        prev = ch;
+                        ch = text[(i += 1)];
+                        overflow = true;
+                    }
+                    // Account for newline escape, but don't break preceding escape
+                    const j = i > escEnd + 1 ? i - 2 : escStart - 1;
+                    // Bail out if lineWidth & minContentWidth are shorter than an escape string
+                    if (escapedFolds[j])
+                        return text;
+                    folds.push(j);
+                    escapedFolds[j] = true;
+                    end = j + endStep;
+                    split = undefined;
+                }
+                else {
+                    overflow = true;
+                }
+            }
+        }
+        prev = ch;
+    }
+    if (overflow && onOverflow)
+        onOverflow();
+    if (folds.length === 0)
+        return text;
+    if (onFold)
+        onFold();
+    let res = text.slice(0, folds[0]);
+    for (let i = 0; i < folds.length; ++i) {
+        const fold = folds[i];
+        const end = folds[i + 1] || text.length;
+        if (fold === 0)
+            res = `\n${indent}${text.slice(0, end)}`;
+        else {
+            if (mode === FOLD_QUOTED && escapedFolds[fold])
+                res += `${text[fold]}\\`;
+            res += `\n${indent}${text.slice(fold + 1, end)}`;
+        }
+    }
+    return res;
+}
+/**
+ * Presumes `i + 1` is at the start of a line
+ * @returns index of last newline in more-indented block
+ */
+function consumeMoreIndentedLines(text, i) {
+    let ch = text[i + 1];
+    while (ch === ' ' || ch === '\t') {
+        do {
+            ch = text[(i += 1)];
+        } while (ch && ch !== '\n');
+        ch = text[i + 1];
+    }
+    return i;
+}
+
+export { FOLD_BLOCK, FOLD_FLOW, FOLD_QUOTED, foldFlowLines };

node_modules/yaml/browser/dist/stringify/stringify.js

@@ -0,0 +1,124 @@
+import { anchorIsValid } from '../doc/anchors.js';
+import { isPair, isAlias, isNode, isScalar, isCollection } from '../nodes/Node.js';
+import { stringifyComment } from './stringifyComment.js';
+import { stringifyString } from './stringifyString.js';
+
+function createStringifyContext(doc, options) {
+    const opt = Object.assign({
+        blockQuote: true,
+        commentString: stringifyComment,
+        defaultKeyType: null,
+        defaultStringType: 'PLAIN',
+        directives: null,
+        doubleQuotedAsJSON: false,
+        doubleQuotedMinMultiLineLength: 40,
+        falseStr: 'false',
+        flowCollectionPadding: true,
+        indentSeq: true,
+        lineWidth: 80,
+        minContentWidth: 20,
+        nullStr: 'null',
+        simpleKeys: false,
+        singleQuote: null,
+        trueStr: 'true',
+        verifyAliasOrder: true
+    }, doc.schema.toStringOptions, options);
+    let inFlow;
+    switch (opt.collectionStyle) {
+        case 'block':
+            inFlow = false;
+            break;
+        case 'flow':
+            inFlow = true;
+            break;
+        default:
+            inFlow = null;
+    }
+    return {
+        anchors: new Set(),
+        doc,
+        flowCollectionPadding: opt.flowCollectionPadding ? ' ' : '',
+        indent: '',
+        indentStep: typeof opt.indent === 'number' ? ' '.repeat(opt.indent) : '  ',
+        inFlow,
+        options: opt
+    };
+}
+function getTagObject(tags, item) {
+    if (item.tag) {
+        const match = tags.filter(t => t.tag === item.tag);
+        if (match.length > 0)
+            return match.find(t => t.format === item.format) ?? match[0];
+    }
+    let tagObj = undefined;
+    let obj;
+    if (isScalar(item)) {
+        obj = item.value;
+        const match = tags.filter(t => t.identify?.(obj));
+        tagObj =
+            match.find(t => t.format === item.format) ?? match.find(t => !t.format);
+    }
+    else {
+        obj = item;
+        tagObj = tags.find(t => t.nodeClass && obj instanceof t.nodeClass);
+    }
+    if (!tagObj) {
+        const name = obj?.constructor?.name ?? typeof obj;
+        throw new Error(`Tag not resolved for ${name} value`);
+    }
+    return tagObj;
+}
+// needs to be called before value stringifier to allow for circular anchor refs
+function stringifyProps(node, tagObj, { anchors, doc }) {
+    if (!doc.directives)
+        return '';
+    const props = [];
+    const anchor = (isScalar(node) || isCollection(node)) && node.anchor;
+    if (anchor && anchorIsValid(anchor)) {
+        anchors.add(anchor);
+        props.push(`&${anchor}`);
+    }
+    const tag = node.tag ? node.tag : tagObj.default ? null : tagObj.tag;
+    if (tag)
+        props.push(doc.directives.tagString(tag));
+    return props.join(' ');
+}
+function stringify(item, ctx, onComment, onChompKeep) {
+    if (isPair(item))
+        return item.toString(ctx, onComment, onChompKeep);
+    if (isAlias(item)) {
+        if (ctx.doc.directives)
+            return item.toString(ctx);
+        if (ctx.resolvedAliases?.has(item)) {
+            throw new TypeError(`Cannot stringify circular structure without alias nodes`);
+        }
+        else {
+            if (ctx.resolvedAliases)
+                ctx.resolvedAliases.add(item);
+            else
+                ctx.resolvedAliases = new Set([item]);
+            item = item.resolve(ctx.doc);
+        }
+    }
+    let tagObj = undefined;
+    const node = isNode(item)
+        ? item
+        : ctx.doc.createNode(item, { onTagObj: o => (tagObj = o) });
+    if (!tagObj)
+        tagObj = getTagObject(ctx.doc.schema.tags, node);
+    const props = stringifyProps(node, tagObj, ctx);
+    if (props.length > 0)
+        ctx.indentAtStart = (ctx.indentAtStart ?? 0) + props.length + 1;
+    const str = typeof tagObj.stringify === 'function'
+        ? tagObj.stringify(node, ctx, onComment, onChompKeep)
+        : isScalar(node)
+            ? stringifyString(node, ctx, onComment, onChompKeep)
+            : node.toString(ctx, onComment, onChompKeep);
+    if (!props)
+        return str;
+    return isScalar(node) || str[0] === '{' || str[0] === '['
+        ? `${props} ${str}`
+        : `${props}\n${ctx.indent}${str}`;
+}
+
+export { createStringifyContext, stringify };

node_modules/yaml/browser/dist/stringify/stringifyCollection.js

@@ -0,0 +1,151 @@
+import { Collection } from '../nodes/Collection.js';
+import { isNode, isPair } from '../nodes/Node.js';
+import { stringify } from './stringify.js';
+import { lineComment, indentComment } from './stringifyComment.js';
+
+function stringifyCollection(collection, ctx, options) {
+    const flow = ctx.inFlow ?? collection.flow;
+    const stringify = flow ? stringifyFlowCollection : stringifyBlockCollection;
+    return stringify(collection, ctx, options);
+}
+function stringifyBlockCollection({ comment, items }, ctx, { blockItemPrefix, flowChars, itemIndent, onChompKeep, onComment }) {
+    const { indent, options: { commentString } } = ctx;
+    const itemCtx = Object.assign({}, ctx, { indent: itemIndent, type: null });
+    let chompKeep = false; // flag for the preceding node's status
+    const lines = [];
+    for (let i = 0; i < items.length; ++i) {
+        const item = items[i];
+        let comment = null;
+        if (isNode(item)) {
+            if (!chompKeep && item.spaceBefore)
+                lines.push('');
+            addCommentBefore(ctx, lines, item.commentBefore, chompKeep);
+            if (item.comment)
+                comment = item.comment;
+        }
+        else if (isPair(item)) {
+            const ik = isNode(item.key) ? item.key : null;
+            if (ik) {
+                if (!chompKeep && ik.spaceBefore)
+                    lines.push('');
+                addCommentBefore(ctx, lines, ik.commentBefore, chompKeep);
+            }
+        }
+        chompKeep = false;
+        let str = stringify(item, itemCtx, () => (comment = null), () => (chompKeep = true));
+        if (comment)
+            str += lineComment(str, itemIndent, commentString(comment));
+        if (chompKeep && comment)
+            chompKeep = false;
+        lines.push(blockItemPrefix + str);
+    }
+    let str;
+    if (lines.length === 0) {
+        str = flowChars.start + flowChars.end;
+    }
+    else {
+        str = lines[0];
+        for (let i = 1; i < lines.length; ++i) {
+            const line = lines[i];
+            str += line ? `\n${indent}${line}` : '\n';
+        }
+    }
+    if (comment) {
+        str += '\n' + indentComment(commentString(comment), indent);
+        if (onComment)
+            onComment();
+    }
+    else if (chompKeep && onChompKeep)
+        onChompKeep();
+    return str;
+}
+function stringifyFlowCollection({ comment, items }, ctx, { flowChars, itemIndent, onComment }) {
+    const { indent, indentStep, flowCollectionPadding: fcPadding, options: { commentString } } = ctx;
+    itemIndent += indentStep;
+    const itemCtx = Object.assign({}, ctx, {
+        indent: itemIndent,
+        inFlow: true,
+        type: null
+    });
+    let reqNewline = false;
+    let linesAtValue = 0;
+    const lines = [];
+    for (let i = 0; i < items.length; ++i) {
+        const item = items[i];
+        let comment = null;
+        if (isNode(item)) {
+            if (item.spaceBefore)
+                lines.push('');
+            addCommentBefore(ctx, lines, item.commentBefore, false);
+            if (item.comment)
+                comment = item.comment;
+        }
+        else if (isPair(item)) {
+            const ik = isNode(item.key) ? item.key : null;
+            if (ik) {
+                if (ik.spaceBefore)
+                    lines.push('');
+                addCommentBefore(ctx, lines, ik.commentBefore, false);
+                if (ik.comment)
+                    reqNewline = true;
+            }
+            const iv = isNode(item.value) ? item.value : null;
+            if (iv) {
+                if (iv.comment)
+                    comment = iv.comment;
+                if (iv.commentBefore)
+                    reqNewline = true;
+            }
+            else if (item.value == null && ik && ik.comment) {
+                comment = ik.comment;
+            }
+        }
+        if (comment)
+            reqNewline = true;
+        let str = stringify(item, itemCtx, () => (comment = null));
+        if (i < items.length - 1)
+            str += ',';
+        if (comment)
+            str += lineComment(str, itemIndent, commentString(comment));
+        if (!reqNewline && (lines.length > linesAtValue || str.includes('\n')))
+            reqNewline = true;
+        lines.push(str);
+        linesAtValue = lines.length;
+    }
+    let str;
+    const { start, end } = flowChars;
+    if (lines.length === 0) {
+        str = start + end;
+    }
+    else {
+        if (!reqNewline) {
+            const len = lines.reduce((sum, line) => sum + line.length + 2, 2);
+            reqNewline = len > Collection.maxFlowStringSingleLineLength;
+        }
+        if (reqNewline) {
+            str = start;
+            for (const line of lines)
+                str += line ? `\n${indentStep}${indent}${line}` : '\n';
+            str += `\n${indent}${end}`;
+        }
+        else {
+            str = `${start}${fcPadding}${lines.join(' ')}${fcPadding}${end}`;
+        }
+    }
+    if (comment) {
+        str += lineComment(str, commentString(comment), indent);
+        if (onComment)
+            onComment();
+    }
+    return str;
+}
+function addCommentBefore({ indent, options: { commentString } }, lines, comment, chompKeep) {
+    if (comment && chompKeep)
+        comment = comment.replace(/^\n+/, '');
+    if (comment) {
+        const ic = indentComment(commentString(comment), indent);
+        lines.push(ic.trimStart()); // Avoid double indent on first line
+    }
+}
+
+export { stringifyCollection };

node_modules/yaml/browser/dist/stringify/stringifyComment.js

@@ -0,0 +1,20 @@
+/**
+ * Stringifies a comment.
+ *
+ * Empty comment lines are left empty,
+ * lines consisting of a single space are replaced by `#`,
+ * and all other lines are prefixed with a `#`.
+ */
+const stringifyComment = (str) => str.replace(/^(?!$)(?: $)?/gm, '#');
+function indentComment(comment, indent) {
+    if (/^\n+$/.test(comment))
+        return comment.substring(1);
+    return indent ? comment.replace(/^(?! *$)/gm, indent) : comment;
+}
+const lineComment = (str, indent, comment) => str.endsWith('\n')
+    ? indentComment(comment, indent)
+    : comment.includes('\n')
+        ? '\n' + indentComment(comment, indent)
+        : (str.endsWith(' ') ? '' : ' ') + comment;
+
+export { indentComment, lineComment, stringifyComment };

node_modules/yaml/browser/dist/stringify/stringifyDocument.js

@@ -0,0 +1,85 @@
+import { isNode } from '../nodes/Node.js';
+import { createStringifyContext, stringify } from './stringify.js';
+import { indentComment, lineComment } from './stringifyComment.js';
+
+function stringifyDocument(doc, options) {
+    const lines = [];
+    let hasDirectives = options.directives === true;
+    if (options.directives !== false && doc.directives) {
+        const dir = doc.directives.toString(doc);
+        if (dir) {
+            lines.push(dir);
+            hasDirectives = true;
+        }
+        else if (doc.directives.docStart)
+            hasDirectives = true;
+    }
+    if (hasDirectives)
+        lines.push('---');
+    const ctx = createStringifyContext(doc, options);
+    const { commentString } = ctx.options;
+    if (doc.commentBefore) {
+        if (lines.length !== 1)
+            lines.unshift('');
+        const cs = commentString(doc.commentBefore);
+        lines.unshift(indentComment(cs, ''));
+    }
+    let chompKeep = false;
+    let contentComment = null;
+    if (doc.contents) {
+        if (isNode(doc.contents)) {
+            if (doc.contents.spaceBefore && hasDirectives)
+                lines.push('');
+            if (doc.contents.commentBefore) {
+                const cs = commentString(doc.contents.commentBefore);
+                lines.push(indentComment(cs, ''));
+            }
+            // top-level block scalars need to be indented if followed by a comment
+            ctx.forceBlockIndent = !!doc.comment;
+            contentComment = doc.contents.comment;
+        }
+        const onChompKeep = contentComment ? undefined : () => (chompKeep = true);
+        let body = stringify(doc.contents, ctx, () => (contentComment = null), onChompKeep);
+        if (contentComment)
+            body += lineComment(body, '', commentString(contentComment));
+        if ((body[0] === '|' || body[0] === '>') &&
+            lines[lines.length - 1] === '---') {
+            // Top-level block scalars with a preceding doc marker ought to use the
+            // same line for their header.
+            lines[lines.length - 1] = `--- ${body}`;
+        }
+        else
+            lines.push(body);
+    }
+    else {
+        lines.push(stringify(doc.contents, ctx));
+    }
+    if (doc.directives?.docEnd) {
+        if (doc.comment) {
+            const cs = commentString(doc.comment);
+            if (cs.includes('\n')) {
+                lines.push('...');
+                lines.push(indentComment(cs, ''));
+            }
+            else {
+                lines.push(`... ${cs}`);
+            }
+        }
+        else {
+            lines.push('...');
+        }
+    }
+    else {
+        let dc = doc.comment;
+        if (dc && chompKeep)
+            dc = dc.replace(/^\n+/, '');
+        if (dc) {
+            if ((!chompKeep || contentComment) && lines[lines.length - 1] !== '')
+                lines.push('');
+            lines.push(indentComment(commentString(dc), ''));
+        }
+    }
+    return lines.join('\n') + '\n';
+}
+
+export { stringifyDocument };

node_modules/yaml/browser/dist/stringify/stringifyNumber.js

@@ -0,0 +1,24 @@
+function stringifyNumber({ format, minFractionDigits, tag, value }) {
+    if (typeof value === 'bigint')
+        return String(value);
+    const num = typeof value === 'number' ? value : Number(value);
+    if (!isFinite(num))
+        return isNaN(num) ? '.nan' : num < 0 ? '-.inf' : '.inf';
+    let n = JSON.stringify(value);
+    if (!format &&
+        minFractionDigits &&
+        (!tag || tag === 'tag:yaml.org,2002:float') &&
+        /^\d/.test(n)) {
+        let i = n.indexOf('.');
+        if (i < 0) {
+            i = n.length;
+            n += '.';
+        }
+        let d = minFractionDigits - (n.length - i - 1);
+        while (d-- > 0)
+            n += '0';
+    }
+    return n;
+}
+
+export { stringifyNumber };

node_modules/yaml/browser/dist/stringify/stringifyPair.js

@@ -0,0 +1,150 @@
+import { isCollection, isNode, isScalar, isSeq } from '../nodes/Node.js';
+import { Scalar } from '../nodes/Scalar.js';
+import { stringify } from './stringify.js';
+import { lineComment, indentComment } from './stringifyComment.js';
+
+function stringifyPair({ key, value }, ctx, onComment, onChompKeep) {
+    const { allNullValues, doc, indent, indentStep, options: { commentString, indentSeq, simpleKeys } } = ctx;
+    let keyComment = (isNode(key) && key.comment) || null;
+    if (simpleKeys) {
+        if (keyComment) {
+            throw new Error('With simple keys, key nodes cannot have comments');
+        }
+        if (isCollection(key)) {
+            const msg = 'With simple keys, collection cannot be used as a key value';
+            throw new Error(msg);
+        }
+    }
+    let explicitKey = !simpleKeys &&
+        (!key ||
+            (keyComment && value == null && !ctx.inFlow) ||
+            isCollection(key) ||
+            (isScalar(key)
+                ? key.type === Scalar.BLOCK_FOLDED || key.type === Scalar.BLOCK_LITERAL
+                : typeof key === 'object'));
+    ctx = Object.assign({}, ctx, {
+        allNullValues: false,
+        implicitKey: !explicitKey && (simpleKeys || !allNullValues),
+        indent: indent + indentStep
+    });
+    let keyCommentDone = false;
+    let chompKeep = false;
+    let str = stringify(key, ctx, () => (keyCommentDone = true), () => (chompKeep = true));
+    if (!explicitKey && !ctx.inFlow && str.length > 1024) {
+        if (simpleKeys)
+            throw new Error('With simple keys, single line scalar must not span more than 1024 characters');
+        explicitKey = true;
+    }
+    if (ctx.inFlow) {
+        if (allNullValues || value == null) {
+            if (keyCommentDone && onComment)
+                onComment();
+            return str === '' ? '?' : explicitKey ? `? ${str}` : str;
+        }
+    }
+    else if ((allNullValues && !simpleKeys) || (value == null && explicitKey)) {
+        str = `? ${str}`;
+        if (keyComment && !keyCommentDone) {
+            str += lineComment(str, ctx.indent, commentString(keyComment));
+        }
+        else if (chompKeep && onChompKeep)
+            onChompKeep();
+        return str;
+    }
+    if (keyCommentDone)
+        keyComment = null;
+    if (explicitKey) {
+        if (keyComment)
+            str += lineComment(str, ctx.indent, commentString(keyComment));
+        str = `? ${str}\n${indent}:`;
+    }
+    else {
+        str = `${str}:`;
+        if (keyComment)
+            str += lineComment(str, ctx.indent, commentString(keyComment));
+    }
+    let vsb, vcb, valueComment;
+    if (isNode(value)) {
+        vsb = !!value.spaceBefore;
+        vcb = value.commentBefore;
+        valueComment = value.comment;
+    }
+    else {
+        vsb = false;
+        vcb = null;
+        valueComment = null;
+        if (value && typeof value === 'object')
+            value = doc.createNode(value);
+    }
+    ctx.implicitKey = false;
+    if (!explicitKey && !keyComment && isScalar(value))
+        ctx.indentAtStart = str.length + 1;
+    chompKeep = false;
+    if (!indentSeq &&
+        indentStep.length >= 2 &&
+        !ctx.inFlow &&
+        !explicitKey &&
+        isSeq(value) &&
+        !value.flow &&
+        !value.tag &&
+        !value.anchor) {
+        // If indentSeq === false, consider '- ' as part of indentation where possible
+        ctx.indent = ctx.indent.substring(2);
+    }
+    let valueCommentDone = false;
+    const valueStr = stringify(value, ctx, () => (valueCommentDone = true), () => (chompKeep = true));
+    let ws = ' ';
+    if (keyComment || vsb || vcb) {
+        ws = vsb ? '\n' : '';
+        if (vcb) {
+            const cs = commentString(vcb);
+            ws += `\n${indentComment(cs, ctx.indent)}`;
+        }
+        if (valueStr === '' && !ctx.inFlow) {
+            if (ws === '\n')
+                ws = '\n\n';
+        }
+        else {
+            ws += `\n${ctx.indent}`;
+        }
+    }
+    else if (!explicitKey && isCollection(value)) {
+        const vs0 = valueStr[0];
+        const nl0 = valueStr.indexOf('\n');
+        const hasNewline = nl0 !== -1;
+        const flow = ctx.inFlow ?? value.flow ?? value.items.length === 0;
+        if (hasNewline || !flow) {
+            let hasPropsLine = false;
+            if (hasNewline && (vs0 === '&' || vs0 === '!')) {
+                let sp0 = valueStr.indexOf(' ');
+                if (vs0 === '&' &&
+                    sp0 !== -1 &&
+                    sp0 < nl0 &&
+                    valueStr[sp0 + 1] === '!') {
+                    sp0 = valueStr.indexOf(' ', sp0 + 1);
+                }
+                if (sp0 === -1 || nl0 < sp0)
+                    hasPropsLine = true;
+            }
+            if (!hasPropsLine)
+                ws = `\n${ctx.indent}`;
+        }
+    }
+    else if (valueStr === '' || valueStr[0] === '\n') {
+        ws = '';
+    }
+    str += ws + valueStr;
+    if (ctx.inFlow) {
+        if (valueCommentDone && onComment)
+            onComment();
+    }
+    else if (valueComment && !valueCommentDone) {
+        str += lineComment(str, ctx.indent, commentString(valueComment));
+    }
+    else if (chompKeep && onChompKeep) {
+        onChompKeep();
+    }
+    return str;
+}
+
+export { stringifyPair };

node_modules/yaml/browser/dist/stringify/stringifyString.js

@@ -0,0 +1,319 @@
+import { Scalar } from '../nodes/Scalar.js';
+import { foldFlowLines, FOLD_QUOTED, FOLD_FLOW, FOLD_BLOCK } from './foldFlowLines.js';
+
+const getFoldOptions = (ctx) => ({
+    indentAtStart: ctx.indentAtStart,
+    lineWidth: ctx.options.lineWidth,
+    minContentWidth: ctx.options.minContentWidth
+});
+// Also checks for lines starting with %, as parsing the output as YAML 1.1 will
+// presume that's starting a new document.
+const containsDocumentMarker = (str) => /^(%|---|\.\.\.)/m.test(str);
+function lineLengthOverLimit(str, lineWidth, indentLength) {
+    if (!lineWidth || lineWidth < 0)
+        return false;
+    const limit = lineWidth - indentLength;
+    const strLen = str.length;
+    if (strLen <= limit)
+        return false;
+    for (let i = 0, start = 0; i < strLen; ++i) {
+        if (str[i] === '\n') {
+            if (i - start > limit)
+                return true;
+            start = i + 1;
+            if (strLen - start <= limit)
+                return false;
+        }
+    }
+    return true;
+}
+function doubleQuotedString(value, ctx) {
+    const json = JSON.stringify(value);
+    if (ctx.options.doubleQuotedAsJSON)
+        return json;
+    const { implicitKey } = ctx;
+    const minMultiLineLength = ctx.options.doubleQuotedMinMultiLineLength;
+    const indent = ctx.indent || (containsDocumentMarker(value) ? '  ' : '');
+    let str = '';
+    let start = 0;
+    for (let i = 0, ch = json[i]; ch; ch = json[++i]) {
+        if (ch === ' ' && json[i + 1] === '\\' && json[i + 2] === 'n') {
+            // space before newline needs to be escaped to not be folded
+            str += json.slice(start, i) + '\\ ';
+            i += 1;
+            start = i;
+            ch = '\\';
+        }
+        if (ch === '\\')
+            switch (json[i + 1]) {
+                case 'u':
+                    {
+                        str += json.slice(start, i);
+                        const code = json.substr(i + 2, 4);
+                        switch (code) {
+                            case '0000':
+                                str += '\\0';
+                                break;
+                            case '0007':
+                                str += '\\a';
+                                break;
+                            case '000b':
+                                str += '\\v';
+                                break;
+                            case '001b':
+                                str += '\\e';
+                                break;
+                            case '0085':
+                                str += '\\N';
+                                break;
+                            case '00a0':
+                                str += '\\_';
+                                break;
+                            case '2028':
+                                str += '\\L';
+                                break;
+                            case '2029':
+                                str += '\\P';
+                                break;
+                            default:
+                                if (code.substr(0, 2) === '00')
+                                    str += '\\x' + code.substr(2);
+                                else
+                                    str += json.substr(i, 6);
+                        }
+                        i += 5;
+                        start = i + 1;
+                    }
+                    break;
+                case 'n':
+                    if (implicitKey ||
+                        json[i + 2] === '"' ||
+                        json.length < minMultiLineLength) {
+                        i += 1;
+                    }
+                    else {
+                        // folding will eat first newline
+                        str += json.slice(start, i) + '\n\n';
+                        while (json[i + 2] === '\\' &&
+                            json[i + 3] === 'n' &&
+                            json[i + 4] !== '"') {
+                            str += '\n';
+                            i += 2;
+                        }
+                        str += indent;
+                        // space after newline needs to be escaped to not be folded
+                        if (json[i + 2] === ' ')
+                            str += '\\';
+                        i += 1;
+                        start = i + 1;
+                    }
+                    break;
+                default:
+                    i += 1;
+            }
+    }
+    str = start ? str + json.slice(start) : json;
+    return implicitKey
+        ? str
+        : foldFlowLines(str, indent, FOLD_QUOTED, getFoldOptions(ctx));
+}
+function singleQuotedString(value, ctx) {
+    if (ctx.options.singleQuote === false ||
+        (ctx.implicitKey && value.includes('\n')) ||
+        /[ \t]\n|\n[ \t]/.test(value) // single quoted string can't have leading or trailing whitespace around newline
+    )
+        return doubleQuotedString(value, ctx);
+    const indent = ctx.indent || (containsDocumentMarker(value) ? '  ' : '');
+    const res = "'" + value.replace(/'/g, "''").replace(/\n+/g, `$&\n${indent}`) + "'";
+    return ctx.implicitKey
+        ? res
+        : foldFlowLines(res, indent, FOLD_FLOW, getFoldOptions(ctx));
+}
+function quotedString(value, ctx) {
+    const { singleQuote } = ctx.options;
+    let qs;
+    if (singleQuote === false)
+        qs = doubleQuotedString;
+    else {
+        const hasDouble = value.includes('"');
+        const hasSingle = value.includes("'");
+        if (hasDouble && !hasSingle)
+            qs = singleQuotedString;
+        else if (hasSingle && !hasDouble)
+            qs = doubleQuotedString;
+        else
+            qs = singleQuote ? singleQuotedString : doubleQuotedString;
+    }
+    return qs(value, ctx);
+}
+function blockString({ comment, type, value }, ctx, onComment, onChompKeep) {
+    const { blockQuote, commentString, lineWidth } = ctx.options;
+    // 1. Block can't end in whitespace unless the last line is non-empty.
+    // 2. Strings consisting of only whitespace are best rendered explicitly.
+    if (!blockQuote || /\n[\t ]+$/.test(value) || /^\s*$/.test(value)) {
+        return quotedString(value, ctx);
+    }
+    const indent = ctx.indent ||
+        (ctx.forceBlockIndent || containsDocumentMarker(value) ? '  ' : '');
+    const literal = blockQuote === 'literal'
+        ? true
+        : blockQuote === 'folded' || type === Scalar.BLOCK_FOLDED
+            ? false
+            : type === Scalar.BLOCK_LITERAL
+                ? true
+                : !lineLengthOverLimit(value, lineWidth, indent.length);
+    if (!value)
+        return literal ? '|\n' : '>\n';
+    // determine chomping from whitespace at value end
+    let chomp;
+    let endStart;
+    for (endStart = value.length; endStart > 0; --endStart) {
+        const ch = value[endStart - 1];
+        if (ch !== '\n' && ch !== '\t' && ch !== ' ')
+            break;
+    }
+    let end = value.substring(endStart);
+    const endNlPos = end.indexOf('\n');
+    if (endNlPos === -1) {
+        chomp = '-'; // strip
+    }
+    else if (value === end || endNlPos !== end.length - 1) {
+        chomp = '+'; // keep
+        if (onChompKeep)
+            onChompKeep();
+    }
+    else {
+        chomp = ''; // clip
+    }
+    if (end) {
+        value = value.slice(0, -end.length);
+        if (end[end.length - 1] === '\n')
+            end = end.slice(0, -1);
+        end = end.replace(/\n+(?!\n|$)/g, `$&${indent}`);
+    }
+    // determine indent indicator from whitespace at value start
+    let startWithSpace = false;
+    let startEnd;
+    let startNlPos = -1;
+    for (startEnd = 0; startEnd < value.length; ++startEnd) {
+        const ch = value[startEnd];
+        if (ch === ' ')
+            startWithSpace = true;
+        else if (ch === '\n')
+            startNlPos = startEnd;
+        else
+            break;
+    }
+    let start = value.substring(0, startNlPos < startEnd ? startNlPos + 1 : startEnd);
+    if (start) {
+        value = value.substring(start.length);
+        start = start.replace(/\n+/g, `$&${indent}`);
+    }
+    const indentSize = indent ? '2' : '1'; // root is at -1
+    let header = (literal ? '|' : '>') + (startWithSpace ? indentSize : '') + chomp;
+    if (comment) {
+        header += ' ' + commentString(comment.replace(/ ?[\r\n]+/g, ' '));
+        if (onComment)
+            onComment();
+    }
+    if (literal) {
+        value = value.replace(/\n+/g, `$&${indent}`);
+        return `${header}\n${indent}${start}${value}${end}`;
+    }
+    value = value
+        .replace(/\n+/g, '\n$&')
+        .replace(/(?:^|\n)([\t ].*)(?:([\n\t ]*)\n(?![\n\t ]))?/g, '$1$2') // more-indented lines aren't folded
+        //                ^ more-ind. ^ empty     ^ capture next empty lines only at end of indent
+        .replace(/\n+/g, `$&${indent}`);
+    const body = foldFlowLines(`${start}${value}${end}`, indent, FOLD_BLOCK, getFoldOptions(ctx));
+    return `${header}\n${indent}${body}`;
+}
+function plainString(item, ctx, onComment, onChompKeep) {
+    const { type, value } = item;
+    const { actualString, implicitKey, indent, indentStep, inFlow } = ctx;
+    if ((implicitKey && /[\n[\]{},]/.test(value)) ||
+        (inFlow && /[[\]{},]/.test(value))) {
+        return quotedString(value, ctx);
+    }
+    if (!value ||
+        /^[\n\t ,[\]{}#&*!|>'"%@`]|^[?-]$|^[?-][ \t]|[\n:][ \t]|[ \t]\n|[\n\t ]#|[\n\t :]$/.test(value)) {
+        // not allowed:
+        // - empty string, '-' or '?'
+        // - start with an indicator character (except [?:-]) or /[?-] /
+        // - '\n ', ': ' or ' \n' anywhere
+        // - '#' not preceded by a non-space char
+        // - end with ' ' or ':'
+        return implicitKey || inFlow || !value.includes('\n')
+            ? quotedString(value, ctx)
+            : blockString(item, ctx, onComment, onChompKeep);
+    }
+    if (!implicitKey &&
+        !inFlow &&
+        type !== Scalar.PLAIN &&
+        value.includes('\n')) {
+        // Where allowed & type not set explicitly, prefer block style for multiline strings
+        return blockString(item, ctx, onComment, onChompKeep);
+    }
+    if (containsDocumentMarker(value)) {
+        if (indent === '') {
+            ctx.forceBlockIndent = true;
+            return blockString(item, ctx, onComment, onChompKeep);
+        }
+        else if (implicitKey && indent === indentStep) {
+            return quotedString(value, ctx);
+        }
+    }
+    const str = value.replace(/\n+/g, `$&\n${indent}`);
+    // Verify that output will be parsed as a string, as e.g. plain numbers and
+    // booleans get parsed with those types in v1.2 (e.g. '42', 'true' & '0.9e-3'),
+    // and others in v1.1.
+    if (actualString) {
+        const test = (tag) => tag.default && tag.tag !== 'tag:yaml.org,2002:str' && tag.test?.test(str);
+        const { compat, tags } = ctx.doc.schema;
+        if (tags.some(test) || compat?.some(test))
+            return quotedString(value, ctx);
+    }
+    return implicitKey
+        ? str
+        : foldFlowLines(str, indent, FOLD_FLOW, getFoldOptions(ctx));
+}
+function stringifyString(item, ctx, onComment, onChompKeep) {
+    const { implicitKey, inFlow } = ctx;
+    const ss = typeof item.value === 'string'
+        ? item
+        : Object.assign({}, item, { value: String(item.value) });
+    let { type } = item;
+    if (type !== Scalar.QUOTE_DOUBLE) {
+        // force double quotes on control characters & unpaired surrogates
+        if (/[\x00-\x08\x0b-\x1f\x7f-\x9f\u{D800}-\u{DFFF}]/u.test(ss.value))
+            type = Scalar.QUOTE_DOUBLE;
+    }
+    const _stringify = (_type) => {
+        switch (_type) {
+            case Scalar.BLOCK_FOLDED:
+            case Scalar.BLOCK_LITERAL:
+                return implicitKey || inFlow
+                    ? quotedString(ss.value, ctx) // blocks are not valid inside flow containers
+                    : blockString(ss, ctx, onComment, onChompKeep);
+            case Scalar.QUOTE_DOUBLE:
+                return doubleQuotedString(ss.value, ctx);
+            case Scalar.QUOTE_SINGLE:
+                return singleQuotedString(ss.value, ctx);
+            case Scalar.PLAIN:
+                return plainString(ss, ctx, onComment, onChompKeep);
+            default:
+                return null;
+        }
+    };
+    let res = _stringify(type);
+    if (res === null) {
+        const { defaultKeyType, defaultStringType } = ctx.options;
+        const t = (implicitKey && defaultKeyType) || defaultStringType;
+        res = _stringify(t);
+        if (res === null)
+            throw new Error(`Unsupported default string type ${t}`);
+    }
+    return res;
+}
+
+export { stringifyString };