@glimmer/syntax/dist/modules/es5/lib/get-template-locals.js

import { isKeyword } from './keywords';
import { preprocess } from './parser/tokenizer-event-handlers';
import traverse from './traversal/traverse';
/**
 * Gets the correct Token from the Node based on it's type
 */

function tokensFromType(node, scopedTokens, options) {
  if (node.type === 'PathExpression') {
    if (node.head.type === 'AtHead' || node.head.type === 'ThisHead') {
      return;
    }

    var possbleToken = node.head.name;

    if (scopedTokens.indexOf(possbleToken) === -1) {
      return possbleToken;
    }
  } else if (node.type === 'ElementNode') {
    var tag = node.tag;

    var _char = tag.charAt(0);

    if (_char === ':' || _char === '@') {
      return;
    }

    if (!options.includeHtmlElements && tag.indexOf('.') === -1 && tag.toLowerCase() === tag) {
      return;
    }

    if (tag.substr(0, 5) === 'this.') {
      return;
    }

    if (scopedTokens.indexOf(tag) !== -1) {
      return;
    }

    return tag;
  }
}
/**
 * Adds tokens to the tokensSet based on their node.type
 */


function addTokens(tokensSet, node, scopedTokens, options) {
  var maybeTokens = tokensFromType(node, scopedTokens, options);
  (Array.isArray(maybeTokens) ? maybeTokens : [maybeTokens]).forEach(function (maybeToken) {
    if (maybeToken !== undefined && maybeToken[0] !== '@') {
      var maybeTokenFirstSegment = maybeToken.split('.')[0];

      if (!scopedTokens.includes(maybeTokenFirstSegment)) {
        tokensSet.add(maybeToken.split('.')[0]);
      }
    }
  });
}
/**
 * Parses and traverses a given handlebars html template to extract all template locals
 * referenced that could possible come from the parent scope. Can exclude known keywords
 * optionally.
 */


export function getTemplateLocals(html, options) {
  if (options === void 0) {
    options = {
      includeHtmlElements: false,
      includeKeywords: false
    };
  }

  var ast = preprocess(html);
  var tokensSet = new Set();
  var scopedTokens = [];
  traverse(ast, {
    Block: {
      enter: function enter(_ref) {
        var blockParams = _ref.blockParams;
        blockParams.forEach(function (param) {
          scopedTokens.push(param);
        });
      },
      exit: function exit(_ref2) {
        var blockParams = _ref2.blockParams;
        blockParams.forEach(function () {
          scopedTokens.pop();
        });
      }
    },
    ElementNode: {
      enter: function enter(node) {
        node.blockParams.forEach(function (param) {
          scopedTokens.push(param);
        });
        addTokens(tokensSet, node, scopedTokens, options);
      },
      exit: function exit(_ref3) {
        var blockParams = _ref3.blockParams;
        blockParams.forEach(function () {
          scopedTokens.pop();
        });
      }
    },
    PathExpression: function PathExpression(node) {
      addTokens(tokensSet, node, scopedTokens, options);
    }
  });
  var tokens = [];
  tokensSet.forEach(function (s) {
    return tokens.push(s);
  });

  if (!(options === null || options === void 0 ? void 0 : options.includeKeywords)) {
    tokens = tokens.filter(function (token) {
      return !isKeyword(token);
    });
  }

  return tokens;
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../packages/@glimmer/syntax/lib/get-template-locals.ts"],"names":[],"mappings":"AAAA,SAAA,SAAA,QAAA,YAAA;AACA,SAAA,UAAA,QAAA,mCAAA;AACA,OAAA,QAAA,MAAA,sBAAA;AAQA;;;;AAGA,SAAA,cAAA,CAAA,IAAA,EAAA,YAAA,EAAA,OAAA,EAGmC;AAEjC,MAAI,IAAI,CAAJ,IAAA,KAAJ,gBAAA,EAAoC;AAClC,QAAI,IAAI,CAAJ,IAAA,CAAA,IAAA,KAAA,QAAA,IAA+B,IAAI,CAAJ,IAAA,CAAA,IAAA,KAAnC,UAAA,EAAkE;AAChE;AACD;;AAED,QAAM,YAAY,GAAG,IAAI,CAAJ,IAAA,CAArB,IAAA;;AAEA,QAAI,YAAY,CAAZ,OAAA,CAAA,YAAA,MAAuC,CAA3C,CAAA,EAA+C;AAC7C,aAAA,YAAA;AACD;AATH,GAAA,MAUO,IAAI,IAAI,CAAJ,IAAA,KAAJ,aAAA,EAAiC;AAAA,QAC9B,GAD8B,GACtC,IADsC,CAC9B,GAD8B;;AAGtC,QAAM,KAAI,GAAG,GAAG,CAAH,MAAA,CAAb,CAAa,CAAb;;AAEA,QAAI,KAAI,KAAJ,GAAA,IAAgB,KAAI,KAAxB,GAAA,EAAkC;AAChC;AACD;;AAED,QAAI,CAAC,OAAO,CAAR,mBAAA,IAAgC,GAAG,CAAH,OAAA,CAAA,GAAA,MAAqB,CAArD,CAAA,IAA2D,GAAG,CAAH,WAAA,OAA/D,GAAA,EAA0F;AACxF;AACD;;AAED,QAAI,GAAG,CAAH,MAAA,CAAA,CAAA,EAAA,CAAA,MAAJ,OAAA,EAAkC;AAChC;AACD;;AAED,QAAI,YAAY,CAAZ,OAAA,CAAA,GAAA,MAA8B,CAAlC,CAAA,EAAsC;AACpC;AACD;;AAED,WAAA,GAAA;AACD;AACF;AAED;;;;;AAGA,SAAA,SAAA,CAAA,SAAA,EAAA,IAAA,EAAA,YAAA,EAAA,OAAA,EAImC;AAEjC,MAAM,WAAW,GAAG,cAAc,CAAA,IAAA,EAAA,YAAA,EAAlC,OAAkC,CAAlC;AAEA,GAAC,KAAK,CAAL,OAAA,CAAA,WAAA,IAAA,WAAA,GAA2C,CAA5C,WAA4C,CAA5C,EAAA,OAAA,CAAoE,UAAA,UAAD,EAAe;AAChF,QAAI,UAAU,KAAV,SAAA,IAA4B,UAAU,CAAV,CAAU,CAAV,KAAhC,GAAA,EAAuD;AACrD,UAAM,sBAAsB,GAAG,UAAU,CAAV,KAAA,CAAA,GAAA,EAA/B,CAA+B,CAA/B;;AACA,UAAI,CAAC,YAAY,CAAZ,QAAA,CAAL,sBAAK,CAAL,EAAoD;AAClD,QAAA,SAAS,CAAT,GAAA,CAAc,UAAU,CAAV,KAAA,CAAA,GAAA,EAAd,CAAc,CAAd;AACD;AACF;AANH,GAAA;AAQD;AAED;;;;;;;AAKA,OAAM,SAAA,iBAAA,CAAA,IAAA,EAEJ,OAFI,EAKH;AAAA,MAHD,OAGC;AAHD,IAAA,OAGC,GAHmC;AAClC,MAAA,mBAAmB,EADe,KAAA;AAElC,MAAA,eAAe,EAAE;AAFiB,KAGnC;AAAA;;AAED,MAAM,GAAG,GAAG,UAAU,CAAtB,IAAsB,CAAtB;AACA,MAAM,SAAS,GAAG,IAAlB,GAAkB,EAAlB;AACA,MAAM,YAAY,GAAlB,EAAA;AAEA,EAAA,QAAQ,CAAA,GAAA,EAAM;AACZ,IAAA,KAAK,EAAE;AACL,MAAA,KADK,uBACgB;AAAA,YAAb,WAAa,QAAb,WAAa;AACnB,QAAA,WAAW,CAAX,OAAA,CAAqB,UAAA,KAAD,EAAU;AAC5B,UAAA,YAAY,CAAZ,IAAA,CAAA,KAAA;AADF,SAAA;AAFG,OAAA;AAOL,MAAA,IAPK,uBAOe;AAAA,YAAb,WAAa,SAAb,WAAa;AAClB,QAAA,WAAW,CAAX,OAAA,CAAoB,YAAK;AACvB,UAAA,YAAY,CAAZ,GAAA;AADF,SAAA;AAGD;AAXI,KADK;AAeZ,IAAA,WAAW,EAAE;AACX,MAAA,KADW,iBACN,IADM,EACD;AACR,QAAA,IAAI,CAAJ,WAAA,CAAA,OAAA,CAA0B,UAAA,KAAD,EAAU;AACjC,UAAA,YAAY,CAAZ,IAAA,CAAA,KAAA;AADF,SAAA;AAGA,QAAA,SAAS,CAAA,SAAA,EAAA,IAAA,EAAA,YAAA,EAAT,OAAS,CAAT;AALS,OAAA;AAQX,MAAA,IARW,uBAQS;AAAA,YAAb,WAAa,SAAb,WAAa;AAClB,QAAA,WAAW,CAAX,OAAA,CAAoB,YAAK;AACvB,UAAA,YAAY,CAAZ,GAAA;AADF,SAAA;AAGD;AAZU,KAfD;AA8BZ,IAAA,cA9BY,0BA8BE,IA9BF,EA8BO;AACjB,MAAA,SAAS,CAAA,SAAA,EAAA,IAAA,EAAA,YAAA,EAAT,OAAS,CAAT;AACD;AAhCW,GAAN,CAAR;AAmCA,MAAI,MAAM,GAAV,EAAA;AAEA,EAAA,SAAS,CAAT,OAAA,CAAmB,UAAA,CAAD;AAAA,WAAO,MAAM,CAAN,IAAA,CAAzB,CAAyB,CAAP;AAAA,GAAlB;;AAEA,MAAI,EAAC,OAAO,KAAP,IAAA,IAAA,OAAO,KAAA,KAAP,CAAA,GAAO,KAAP,CAAA,GAAA,OAAO,CAAZ,eAAI,CAAJ,EAA+B;AAC7B,IAAA,MAAM,GAAG,MAAM,CAAN,MAAA,CAAe,UAAA,KAAD;AAAA,aAAW,CAAC,SAAS,CAA5C,KAA4C,CAArB;AAAA,KAAd,CAAT;AACD;;AAED,SAAA,MAAA;AACD","sourcesContent":["import { isKeyword } from './keywords';\nimport { preprocess } from './parser/tokenizer-event-handlers';\nimport traverse from './traversal/traverse';\nimport * as ASTv1 from './v1/api';\n\ninterface GetTemplateLocalsOptions {\n  includeKeywords?: boolean;\n  includeHtmlElements?: boolean;\n}\n\n/**\n * Gets the correct Token from the Node based on it's type\n */\nfunction tokensFromType(\n  node: ASTv1.Node,\n  scopedTokens: string[],\n  options: GetTemplateLocalsOptions\n): string | void {\n  if (node.type === 'PathExpression') {\n    if (node.head.type === 'AtHead' || node.head.type === 'ThisHead') {\n      return;\n    }\n\n    const possbleToken = node.head.name;\n\n    if (scopedTokens.indexOf(possbleToken) === -1) {\n      return possbleToken;\n    }\n  } else if (node.type === 'ElementNode') {\n    const { tag } = node;\n\n    const char = tag.charAt(0);\n\n    if (char === ':' || char === '@') {\n      return;\n    }\n\n    if (!options.includeHtmlElements && tag.indexOf('.') === -1 && tag.toLowerCase() === tag) {\n      return;\n    }\n\n    if (tag.substr(0, 5) === 'this.') {\n      return;\n    }\n\n    if (scopedTokens.indexOf(tag) !== -1) {\n      return;\n    }\n\n    return tag;\n  }\n}\n\n/**\n * Adds tokens to the tokensSet based on their node.type\n */\nfunction addTokens(\n  tokensSet: Set<string>,\n  node: ASTv1.Node,\n  scopedTokens: string[],\n  options: GetTemplateLocalsOptions\n) {\n  const maybeTokens = tokensFromType(node, scopedTokens, options);\n\n  (Array.isArray(maybeTokens) ? maybeTokens : [maybeTokens]).forEach((maybeToken) => {\n    if (maybeToken !== undefined && maybeToken[0] !== '@') {\n      const maybeTokenFirstSegment = maybeToken.split('.')[0];\n      if (!scopedTokens.includes(maybeTokenFirstSegment)) {\n        tokensSet.add(maybeToken.split('.')[0]);\n      }\n    }\n  });\n}\n\n/**\n * Parses and traverses a given handlebars html template to extract all template locals\n * referenced that could possible come from the parent scope. Can exclude known keywords\n * optionally.\n */\nexport function getTemplateLocals(\n  html: string,\n  options: GetTemplateLocalsOptions = {\n    includeHtmlElements: false,\n    includeKeywords: false,\n  }\n): string[] {\n  const ast = preprocess(html);\n  const tokensSet = new Set<string>();\n  const scopedTokens: string[] = [];\n\n  traverse(ast, {\n    Block: {\n      enter({ blockParams }) {\n        blockParams.forEach((param) => {\n          scopedTokens.push(param);\n        });\n      },\n\n      exit({ blockParams }) {\n        blockParams.forEach(() => {\n          scopedTokens.pop();\n        });\n      },\n    },\n\n    ElementNode: {\n      enter(node) {\n        node.blockParams.forEach((param) => {\n          scopedTokens.push(param);\n        });\n        addTokens(tokensSet, node, scopedTokens, options);\n      },\n\n      exit({ blockParams }) {\n        blockParams.forEach(() => {\n          scopedTokens.pop();\n        });\n      },\n    },\n\n    PathExpression(node) {\n      addTokens(tokensSet, node, scopedTokens, options);\n    },\n  });\n\n  let tokens: string[] = [];\n\n  tokensSet.forEach((s) => tokens.push(s));\n\n  if (!options?.includeKeywords) {\n    tokens = tokens.filter((token) => !isKeyword(token));\n  }\n\n  return tokens;\n}\n"],"sourceRoot":""}