static getScore()

in src/js/webview/CSSSelectorResolver.js [301:347]

• 29 lines of code
• 7 McCabe index (conditional complexity)

  static getScore(
    candidate: string,
    fieldName: string,
    contextSelector: string
  ): number {
    // Ends recursion on empty candidate
    if (!candidate) {
      return 0;
    }

    // Extracts components
    // ex components('article head h1') = ['article', 'head', 'h1']
    let components = candidate.split(/\s+/);

    // Extracts leaf
    // ex: leaf('article head h1') = 'h1'
    let leaf = components[components.length - 1];

    // Extracts trunk
    // ex: trunk('article head h1') = 'article head'
    let trunk = components
      .slice(0, components.length - 1)
      .join(' ')
      .trim();

    // Extracts features for score calculations
    // This will recursively look for the trunk score
    let features: { [string]: number } = {
      leafHasID: leaf.indexOf('#') !== -1 ? 1 : 0,
      leafHasClass: leaf.indexOf('.') !== -1 ? 1 : 0,
      leafHasTagName: leaf.match(/^[a-zA-Z]+/) ? 1 : 0,
      endsWithNumber: leaf.match(/[0-9]+$/) ? 1 : 0,
      numberOfComponents: components.length ? components.length : 0,
      trunkScore: this.getScore(trunk, fieldName, contextSelector),
    };

    let weights = this.getFeatureWeights(fieldName);

    // score = features * FEATURE_WEIGHTS
    let score = Object.keys(features)
      .map(key => weights[key] * features[key])
      .reduce((total, current) => total + current, 0);

    score = this.filterScore(score, candidate, contextSelector, fieldName);

    return score;
  }