converse-built/node_modules/@glimmer/syntax/dist/modules/es2017/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;
    }

    const possbleToken = node.head.name;

    if (scopedTokens.indexOf(possbleToken) === -1) {
      return possbleToken;
    }
  } else if (node.type === 'ElementNode') {
    const {
      tag
    } = node;
    const 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) {
  const maybeTokens = tokensFromType(node, scopedTokens, options);
  (Array.isArray(maybeTokens) ? maybeTokens : [maybeTokens]).forEach(maybeToken => {
    if (maybeToken !== undefined && maybeToken[0] !== '@') {
      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 praent scope. Can exclude known keywords
 * optionally.
 */


export function getTemplateLocals(html, options = {
  includeHtmlElements: false,
  includeKeywords: false
}) {
  const ast = preprocess(html);
  const tokensSet = new Set();
  const scopedTokens = [];
  traverse(ast, {
    Block: {
      enter({
        blockParams
      }) {
        blockParams.forEach(param => {
          scopedTokens.push(param);
        });
      },

      exit({
        blockParams
      }) {
        blockParams.forEach(() => {
          scopedTokens.pop();
        });
      }

    },
    ElementNode: {
      enter(node) {
        node.blockParams.forEach(param => {
          scopedTokens.push(param);
        });
        addTokens(tokensSet, node, scopedTokens, options);
      },

      exit({
        blockParams
      }) {
        blockParams.forEach(() => {
          scopedTokens.pop();
        });
      }

    },

    PathExpression(node) {
      addTokens(tokensSet, node, scopedTokens, options);
    }

  });
  let tokens = [];
  tokensSet.forEach(s => tokens.push(s));

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

  return tokens;
}
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