ember-template-lint/lib/rules/require-splattributes.js

Linter for Ember or Handlebars templates.

'use strict';

const Rule = require('./base');

module.exports = class RequireSplattributes extends Rule {
  visitor() {
    let foundSplattributes = false;

    return {
      AttrNode(node) {
        if (node.name === '...attributes') {
          foundSplattributes = true;
        }
      },

      Template: {
        exit(node) {
          if (!foundSplattributes) {
            let { body } = node;
            let elementNodes = body.filter((it) => it.type === 'ElementNode');
            let nonEmptyTextNodes = body.filter((it) => it.type === 'TextNode' && it.chars.trim());
            if (elementNodes.length === 1 && nonEmptyTextNodes.length === 0) {
              this.report({
                message: 'The root element in this template should use `...attributes`',
                node: elementNodes[0],
              });
            } else {
              this.report({
                message: 'At least one element in this template should use `...attributes`',
                node,
              });
            }
          }
        },
      },
    };
  }

  report({ message, node }) {
    this.log({
      message,
      line: node.loc && node.loc.start.line,
      column: node.loc && node.loc.start.column,
      source: this.sourceForNode(node),
    });
  }
};