import { assertPresent, assign } from '@glimmer/util';
import { parse, parseWithoutProcessing } from '@handlebars/parser';
import { EntityParser } from 'simple-html-tokenizer';
import print from '../generation/print';
import { voidMap } from '../generation/printer';
import { Source } from '../source/source';
import { SourceSpan } from '../source/span';
import { generateSyntaxError } from '../syntax-error';
import traverse from '../traversal/traverse';
import Walker from '../traversal/walker';
import { appendChild, parseElementBlockParams } from '../utils';
import b from '../v1/parser-builders';
import publicBuilder from '../v1/public-builders';
import { HandlebarsNodeVisitors } from './handlebars-node-visitors';
export class TokenizerEventHandlers extends HandlebarsNodeVisitors {
  constructor() {
    super(...arguments);
    this.tagOpenLine = 0;
    this.tagOpenColumn = 0;
  }

  reset() {
    this.currentNode = null;
  } // Comment


  beginComment() {
    this.currentNode = b.comment('', this.source.offsetFor(this.tagOpenLine, this.tagOpenColumn));
  }

  appendToCommentData(char) {
    this.currentComment.value += char;
  }

  finishComment() {
    appendChild(this.currentElement(), this.finish(this.currentComment));
  } // Data


  beginData() {
    this.currentNode = b.text({
      chars: '',
      loc: this.offset().collapsed()
    });
  }

  appendToData(char) {
    this.currentData.chars += char;
  }

  finishData() {
    this.currentData.loc = this.currentData.loc.withEnd(this.offset());
    appendChild(this.currentElement(), this.currentData);
  } // Tags - basic


  tagOpen() {
    this.tagOpenLine = this.tokenizer.line;
    this.tagOpenColumn = this.tokenizer.column;
  }

  beginStartTag() {
    this.currentNode = {
      type: 'StartTag',
      name: '',
      attributes: [],
      modifiers: [],
      comments: [],
      selfClosing: false,
      loc: this.source.offsetFor(this.tagOpenLine, this.tagOpenColumn)
    };
  }

  beginEndTag() {
    this.currentNode = {
      type: 'EndTag',
      name: '',
      attributes: [],
      modifiers: [],
      comments: [],
      selfClosing: false,
      loc: this.source.offsetFor(this.tagOpenLine, this.tagOpenColumn)
    };
  }

  finishTag() {
    let tag = this.finish(this.currentTag);

    if (tag.type === 'StartTag') {
      this.finishStartTag();

      if (tag.name === ':') {
        throw generateSyntaxError('Invalid named block named detected, you may have created a named block without a name, or you may have began your name with a number. Named blocks must have names that are at least one character long, and begin with a lower case letter', this.source.spanFor({
          start: this.currentTag.loc.toJSON(),
          end: this.offset().toJSON()
        }));
      }

      if (voidMap[tag.name] || tag.selfClosing) {
        this.finishEndTag(true);
      }
    } else if (tag.type === 'EndTag') {
      this.finishEndTag(false);
    }
  }

  finishStartTag() {
    let {
      name,
      attributes: attrs,
      modifiers,
      comments,
      selfClosing,
      loc
    } = this.finish(this.currentStartTag);
    let element = b.element({
      tag: name,
      selfClosing,
      attrs,
      modifiers,
      comments,
      children: [],
      blockParams: [],
      loc
    });
    this.elementStack.push(element);
  }

  finishEndTag(isVoid) {
    let tag = this.finish(this.currentTag);
    let element = this.elementStack.pop();
    let parent = this.currentElement();
    this.validateEndTag(tag, element, isVoid);
    element.loc = element.loc.withEnd(this.offset());
    parseElementBlockParams(element);
    appendChild(parent, element);
  }

  markTagAsSelfClosing() {
    this.currentTag.selfClosing = true;
  } // Tags - name


  appendToTagName(char) {
    this.currentTag.name += char;
  } // Tags - attributes


  beginAttribute() {
    let offset = this.offset();
    this.currentAttribute = {
      name: '',
      parts: [],
      currentPart: null,
      isQuoted: false,
      isDynamic: false,
      start: offset,
      valueSpan: offset.collapsed()
    };
  }

  appendToAttributeName(char) {
    this.currentAttr.name += char;
  }

  beginAttributeValue(isQuoted) {
    this.currentAttr.isQuoted = isQuoted;
    this.startTextPart();
    this.currentAttr.valueSpan = this.offset().collapsed();
  }

  appendToAttributeValue(char) {
    let parts = this.currentAttr.parts;
    let lastPart = parts[parts.length - 1];
    let current = this.currentAttr.currentPart;

    if (current) {
      current.chars += char; // update end location for each added char

      current.loc = current.loc.withEnd(this.offset());
    } else {
      // initially assume the text node is a single char
      let loc = this.offset(); // the tokenizer line/column have already been advanced, correct location info

      if (char === '\n') {
        loc = lastPart ? lastPart.loc.getEnd() : this.currentAttr.valueSpan.getStart();
      } else {
        loc = loc.move(-1);
      }

      this.currentAttr.currentPart = b.text({
        chars: char,
        loc: loc.collapsed()
      });
    }
  }

  finishAttributeValue() {
    this.finalizeTextPart();
    let tag = this.currentTag;
    let tokenizerPos = this.offset();

    if (tag.type === 'EndTag') {
      throw generateSyntaxError(`Invalid end tag: closing tag must not have attributes`, this.source.spanFor({
        start: tag.loc.toJSON(),
        end: tokenizerPos.toJSON()
      }));
    }

    let {
      name,
      parts,
      start,
      isQuoted,
      isDynamic,
      valueSpan
    } = this.currentAttr;
    let value = this.assembleAttributeValue(parts, isQuoted, isDynamic, start.until(tokenizerPos));
    value.loc = valueSpan.withEnd(tokenizerPos);
    let attribute = b.attr({
      name,
      value,
      loc: start.until(tokenizerPos)
    });
    this.currentStartTag.attributes.push(attribute);
  }

  reportSyntaxError(message) {
    throw generateSyntaxError(message, this.offset().collapsed());
  }

  assembleConcatenatedValue(parts) {
    for (let i = 0; i < parts.length; i++) {
      let part = parts[i];

      if (part.type !== 'MustacheStatement' && part.type !== 'TextNode') {
        throw generateSyntaxError('Unsupported node in quoted attribute value: ' + part['type'], part.loc);
      }
    }

    assertPresent(parts, `the concatenation parts of an element should not be empty`);
    let first = parts[0];
    let last = parts[parts.length - 1];
    return b.concat(parts, this.source.spanFor(first.loc).extend(this.source.spanFor(last.loc)));
  }

  validateEndTag(tag, element, selfClosing) {
    let error;

    if (voidMap[tag.name] && !selfClosing) {
      // EngTag is also called by StartTag for void and self-closing tags (i.e.
      // <input> or <br />, so we need to check for that here. Otherwise, we would
      // throw an error for those cases.
      error = `<${tag.name}> elements do not need end tags. You should remove it`;
    } else if (element.tag === undefined) {
      error = `Closing tag </${tag.name}> without an open tag`;
    } else if (element.tag !== tag.name) {
      error = `Closing tag </${tag.name}> did not match last open tag <${element.tag}> (on line ${element.loc.startPosition.line})`;
    }

    if (error) {
      throw generateSyntaxError(error, tag.loc);
    }
  }

  assembleAttributeValue(parts, isQuoted, isDynamic, span) {
    if (isDynamic) {
      if (isQuoted) {
        return this.assembleConcatenatedValue(parts);
      } else {
        if (parts.length === 1 || parts.length === 2 && parts[1].type === 'TextNode' && parts[1].chars === '/') {
          return parts[0];
        } else {
          throw generateSyntaxError(`An unquoted attribute value must be a string or a mustache, ` + `preceded by whitespace or a '=' character, and ` + `followed by whitespace, a '>' character, or '/>'`, span);
        }
      }
    } else {
      return parts.length > 0 ? parts[0] : b.text({
        chars: '',
        loc: span
      });
    }
  }

}
const syntax = {
  parse: preprocess,
  builders: publicBuilder,
  print,
  traverse,
  Walker
};

class CodemodEntityParser extends EntityParser {
  // match upstream types, but never match an entity
  constructor() {
    super({});
  }

  parse() {
    return undefined;
  }

}

export function preprocess(input, options = {}) {
  var _a, _b, _c;

  let mode = options.mode || 'precompile';
  let source;
  let ast;

  if (typeof input === 'string') {
    source = new Source(input, (_a = options.meta) === null || _a === void 0 ? void 0 : _a.moduleName);

    if (mode === 'codemod') {
      ast = parseWithoutProcessing(input, options.parseOptions);
    } else {
      ast = parse(input, options.parseOptions);
    }
  } else if (input instanceof Source) {
    source = input;

    if (mode === 'codemod') {
      ast = parseWithoutProcessing(input.source, options.parseOptions);
    } else {
      ast = parse(input.source, options.parseOptions);
    }
  } else {
    source = new Source('', (_b = options.meta) === null || _b === void 0 ? void 0 : _b.moduleName);
    ast = input;
  }

  let entityParser = undefined;

  if (mode === 'codemod') {
    entityParser = new CodemodEntityParser();
  }

  let offsets = SourceSpan.forCharPositions(source, 0, source.source.length);
  ast.loc = {
    source: '(program)',
    start: offsets.startPosition,
    end: offsets.endPosition
  };
  let program = new TokenizerEventHandlers(source, entityParser, mode).acceptTemplate(ast);

  if (options.strictMode) {
    program.blockParams = (_c = options.locals) !== null && _c !== void 0 ? _c : [];
  }

  if (options && options.plugins && options.plugins.ast) {
    for (let i = 0, l = options.plugins.ast.length; i < l; i++) {
      let transform = options.plugins.ast[i];
      let env = assign({}, options, {
        syntax
      }, {
        plugins: undefined
      });
      let pluginResult = transform(env);
      traverse(program, pluginResult.visitor);
    }
  }

  return program;
}
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{ Option } from '@glimmer/interfaces';\nimport { assertPresent, assign } from '@glimmer/util';\nimport { parse, parseWithoutProcessing } from '@handlebars/parser';\nimport { EntityParser } from 'simple-html-tokenizer';\n\nimport print from '../generation/print';\nimport { voidMap } from '../generation/printer';\nimport { Tag } from '../parser';\nimport { Source } from '../source/source';\nimport { SourceOffset, SourceSpan } from '../source/span';\nimport { generateSyntaxError } from '../syntax-error';\nimport traverse from '../traversal/traverse';\nimport { NodeVisitor } from '../traversal/visitor';\nimport Walker from '../traversal/walker';\nimport { appendChild, parseElementBlockParams } from '../utils';\nimport * as ASTv1 from '../v1/api';\nimport * as HBS from '../v1/handlebars-ast';\nimport b from '../v1/parser-builders';\nimport publicBuilder from '../v1/public-builders';\nimport { HandlebarsNodeVisitors } from './handlebars-node-visitors';\n\nexport class TokenizerEventHandlers extends HandlebarsNodeVisitors {\n  private tagOpenLine = 0;\n  private tagOpenColumn = 0;\n\n  reset(): void {\n    this.currentNode = null;\n  }\n\n  // Comment\n\n  beginComment(): void {\n    this.currentNode = b.comment('', this.source.offsetFor(this.tagOpenLine, this.tagOpenColumn));\n  }\n\n  appendToCommentData(char: string): void {\n    this.currentComment.value += char;\n  }\n\n  finishComment(): void {\n    appendChild(this.currentElement(), this.finish(this.currentComment));\n  }\n\n  // Data\n\n  beginData(): void {\n    this.currentNode = b.text({\n      chars: '',\n      loc: this.offset().collapsed(),\n    });\n  }\n\n  appendToData(char: string): void {\n    this.currentData.chars += char;\n  }\n\n  finishData(): void {\n    this.currentData.loc = this.currentData.loc.withEnd(this.offset());\n\n    appendChild(this.currentElement(), this.currentData);\n  }\n\n  // Tags - basic\n\n  tagOpen(): void {\n    this.tagOpenLine = this.tokenizer.line;\n    this.tagOpenColumn = this.tokenizer.column;\n  }\n\n  beginStartTag(): void {\n    this.currentNode = {\n      type: 'StartTag',\n      name: '',\n      attributes: [],\n      modifiers: [],\n      comments: [],\n      selfClosing: false,\n      loc: this.source.offsetFor(this.tagOpenLine, this.tagOpenColumn),\n    };\n  }\n\n  beginEndTag(): void {\n    this.currentNode = {\n      type: 'EndTag',\n      name: '',\n      attributes: [],\n      modifiers: [],\n      comments: [],\n      selfClosing: false,\n      loc: this.source.offsetFor(this.tagOpenLine, this.tagOpenColumn),\n    };\n  }\n\n  finishTag(): void {\n    let tag = this.finish(this.currentTag);\n\n    if (tag.type === 'StartTag') {\n      this.finishStartTag();\n\n      if (tag.name === ':') {\n        throw generateSyntaxError(\n          'Invalid named block named detected, you may have created a named block without a name, or you may have began your name with a number. Named blocks must have names that are at least one character long, and begin with a lower case letter',\n          this.source.spanFor({\n            start: this.currentTag.loc.toJSON(),\n            end: this.offset().toJSON(),\n          })\n        );\n      }\n\n      if (voidMap[tag.name] || tag.selfClosing) {\n        this.finishEndTag(true);\n      }\n    } else if (tag.type === 'EndTag') {\n      this.finishEndTag(false);\n    }\n  }\n\n  finishStartTag(): void {\n    let { name, attributes: attrs, modifiers, comments, selfClosing, loc } = this.finish(\n      this.currentStartTag\n    );\n\n    let element = b.element({\n      tag: name,\n      selfClosing,\n      attrs,\n      modifiers,\n      comments,\n      children: [],\n      blockParams: [],\n      loc,\n    });\n    this.elementStack.push(element);\n  }\n\n  finishEndTag(isVoid: boolean): void {\n    let tag = this.finish(this.currentTag);\n\n    let element = this.elementStack.pop() as ASTv1.ElementNode;\n    let parent = this.currentElement();\n\n    this.validateEndTag(tag, element, isVoid);\n\n    element.loc = element.loc.withEnd(this.offset());\n    parseElementBlockParams(element);\n    appendChild(parent, element);\n  }\n\n  markTagAsSelfClosing(): void {\n    this.currentTag.selfClosing = true;\n  }\n\n  // Tags - name\n\n  appendToTagName(char: string): void {\n    this.currentTag.name += char;\n  }\n\n  // Tags - attributes\n\n  beginAttribute(): void {\n    let offset = this.offset();\n\n    this.currentAttribute = {\n      name: '',\n      parts: [],\n      currentPart: null,\n      isQuoted: false,\n      isDynamic: false,\n      start: offset,\n      valueSpan: offset.collapsed(),\n    };\n  }\n\n  appendToAttributeName(char: string): void {\n    this.currentAttr.name += char;\n  }\n\n  beginAttributeValue(isQuoted: boolean): void {\n    this.currentAttr.isQuoted = isQuoted;\n    this.startTextPart();\n    this.currentAttr.valueSpan = this.offset().collapsed();\n  }\n\n  appendToAttributeValue(char: string): void {\n    let parts = this.currentAttr.parts;\n    let lastPart = parts[parts.length - 1];\n\n    let current = this.currentAttr.currentPart;\n\n    if (current) {\n      current.chars += char;\n\n      // update end location for each added char\n      current.loc = current.loc.withEnd(this.offset());\n    } else {\n      // initially assume the text node is a single char\n      let loc: SourceOffset = this.offset();\n\n      // the tokenizer line/column have already been advanced, correct location info\n      if (char === '\\n') {\n        loc = lastPart ? lastPart.loc.getEnd() : this.currentAttr.valueSpan.getStart();\n      } else {\n        loc = loc.move(-1);\n      }\n\n      this.currentAttr.currentPart = b.text({ chars: char, loc: loc.collapsed() });\n    }\n  }\n\n  finishAttributeValue(): void {\n    this.finalizeTextPart();\n\n    let tag = this.currentTag;\n    let tokenizerPos = this.offset();\n\n    if (tag.type === 'EndTag') {\n      throw generateSyntaxError(\n        `Invalid end tag: closing tag must not have attributes`,\n        this.source.spanFor({ start: tag.loc.toJSON(), end: tokenizerPos.toJSON() })\n      );\n    }\n\n    let { name, parts, start, isQuoted, isDynamic, valueSpan } = this.currentAttr;\n    let value = this.assembleAttributeValue(parts, isQuoted, isDynamic, start.until(tokenizerPos));\n    value.loc = valueSpan.withEnd(tokenizerPos);\n\n    let attribute = b.attr({ name, value, loc: start.until(tokenizerPos) });\n\n    this.currentStartTag.attributes.push(attribute);\n  }\n\n  reportSyntaxError(message: string): void {\n    throw generateSyntaxError(message, this.offset().collapsed());\n  }\n\n  assembleConcatenatedValue(\n    parts: (ASTv1.MustacheStatement | ASTv1.TextNode)[]\n  ): ASTv1.ConcatStatement {\n    for (let i = 0; i < parts.length; i++) {\n      let part: ASTv1.BaseNode = parts[i];\n\n      if (part.type !== 'MustacheStatement' && part.type !== 'TextNode') {\n        throw generateSyntaxError(\n          'Unsupported node in quoted attribute value: ' + part['type'],\n          part.loc\n        );\n      }\n    }\n\n    assertPresent(parts, `the concatenation parts of an element should not be empty`);\n\n    let first = parts[0];\n    let last = parts[parts.length - 1];\n\n    return b.concat(parts, this.source.spanFor(first.loc).extend(this.source.spanFor(last.loc)));\n  }\n\n  validateEndTag(\n    tag: Tag<'StartTag' | 'EndTag'>,\n    element: ASTv1.ElementNode,\n    selfClosing: boolean\n  ): void {\n    let error;\n\n    if (voidMap[tag.name] && !selfClosing) {\n      // EngTag is also called by StartTag for void and self-closing tags (i.e.\n      // <input> or <br />, so we need to check for that here. Otherwise, we would\n      // throw an error for those cases.\n      error = `<${tag.name}> elements do not need end tags. You should remove it`;\n    } else if (element.tag === undefined) {\n      error = `Closing tag </${tag.name}> without an open tag`;\n    } else if (element.tag !== tag.name) {\n      error = `Closing tag </${tag.name}> did not match last open tag <${element.tag}> (on line ${element.loc.startPosition.line})`;\n    }\n\n    if (error) {\n      throw generateSyntaxError(error, tag.loc);\n    }\n  }\n\n  assembleAttributeValue(\n    parts: (ASTv1.MustacheStatement | ASTv1.TextNode)[],\n    isQuoted: boolean,\n    isDynamic: boolean,\n    span: SourceSpan\n  ): ASTv1.ConcatStatement | ASTv1.MustacheStatement | ASTv1.TextNode {\n    if (isDynamic) {\n      if (isQuoted) {\n        return this.assembleConcatenatedValue(parts);\n      } else {\n        if (\n          parts.length === 1 ||\n          (parts.length === 2 &&\n            parts[1].type === 'TextNode' &&\n            (parts[1] as ASTv1.TextNode).chars === '/')\n        ) {\n          return parts[0];\n        } else {\n          throw generateSyntaxError(\n            `An unquoted attribute value must be a string or a mustache, ` +\n              `preceded by whitespace or a '=' character, and ` +\n              `followed by whitespace, a '>' character, or '/>'`,\n            span\n          );\n        }\n      }\n    } else {\n      return parts.length > 0 ? parts[0] : b.text({ chars: '', loc: span });\n    }\n  }\n}\n\n/**\n  ASTPlugins can make changes to the Glimmer template AST before\n  compilation begins.\n*/\nexport interface ASTPluginBuilder<TEnv extends ASTPluginEnvironment = ASTPluginEnvironment> {\n  (env: TEnv): ASTPlugin;\n}\n\nexport interface ASTPlugin {\n  name: string;\n  visitor: NodeVisitor;\n}\n\nexport interface ASTPluginEnvironment {\n  meta?: object;\n  syntax: Syntax;\n}\n\ninterface HandlebarsParseOptions {\n  srcName?: string;\n  ignoreStandalone?: boolean;\n}\n\nexport interface TemplateIdFn {\n  (src: string): Option<string>;\n}\n\nexport interface PrecompileOptions extends PreprocessOptions {\n  id?: TemplateIdFn;\n  customizeComponentName?(input: string): string;\n}\n\nexport interface PreprocessOptions {\n  strictMode?: boolean;\n  locals?: string[];\n  meta?: {\n    moduleName?: string;\n  };\n  plugins?: {\n    ast?: ASTPluginBuilder[];\n  };\n  parseOptions?: HandlebarsParseOptions;\n  customizeComponentName?(input: string): string;\n\n  /**\n    Useful for specifying a group of options together.\n\n    When `'codemod'` we disable all whitespace control in handlebars\n    (to preserve as much as possible) and we also avoid any\n    escaping/unescaping of HTML entity codes.\n   */\n  mode?: 'codemod' | 'precompile';\n}\n\nexport interface Syntax {\n  parse: typeof preprocess;\n  builders: typeof publicBuilder;\n  print: typeof print;\n  traverse: typeof traverse;\n  Walker: typeof Walker;\n}\n\nconst syntax: Syntax = {\n  parse: preprocess,\n  builders: publicBuilder,\n  print,\n  traverse,\n  Walker,\n};\n\nclass CodemodEntityParser extends EntityParser {\n  // match upstream types, but never match an entity\n  constructor() {\n    super({});\n  }\n\n  parse(): string | undefined {\n    return undefined;\n  }\n}\n\nexport function preprocess(\n  input: string | Source | HBS.Program,\n  options: PreprocessOptions = {}\n): ASTv1.Template {\n  let mode = options.mode || 'precompile';\n\n  let source: Source;\n  let ast: HBS.Program;\n  if (typeof input === 'string') {\n    source = new Source(input, options.meta?.moduleName);\n\n    if (mode === 'codemod') {\n      ast = parseWithoutProcessing(input, options.parseOptions) as HBS.Program;\n    } else {\n      ast = parse(input, options.parseOptions) as HBS.Program;\n    }\n  } else if (input instanceof Source) {\n    source = input;\n\n    if (mode === 'codemod') {\n      ast = parseWithoutProcessing(input.source, options.parseOptions) as HBS.Program;\n    } else {\n      ast = parse(input.source, options.parseOptions) as HBS.Program;\n    }\n  } else {\n    source = new Source('', options.meta?.moduleName);\n    ast = input;\n  }\n\n  let entityParser = undefined;\n  if (mode === 'codemod') {\n    entityParser = new CodemodEntityParser();\n  }\n\n  let offsets = SourceSpan.forCharPositions(source, 0, source.source.length);\n  ast.loc = {\n    source: '(program)',\n    start: offsets.startPosition,\n    end: offsets.endPosition,\n  };\n\n  let program = new TokenizerEventHandlers(source, entityParser, mode).acceptTemplate(ast);\n\n  if (options.strictMode) {\n    program.blockParams = options.locals ?? [];\n  }\n\n  if (options && options.plugins && options.plugins.ast) {\n    for (let i = 0, l = options.plugins.ast.length; i < l; i++) {\n      let transform = options.plugins.ast[i];\n      let env: ASTPluginEnvironment = assign({}, options, { syntax }, { plugins: undefined });\n\n      let pluginResult = transform(env);\n\n      traverse(program, pluginResult.visitor);\n    }\n  }\n\n  return program;\n}\n"],"sourceRoot":""}