php-plugin.js

module.exports = function (options) {
  return {
    lex: {
      advance: function(lexer) {
        return this.php(lexer);
      },
      php: function(lexer) {
        var tok = lexer.scanEndOfLine(/^@([^\n]+)/, 'php-code');
        if (tok) {
          lexer.tokens.push(tok);
          return true;
        }
      }
    },
    parse: {
      expressionTokens: {
        'php-code': function(parser) {
          var tok = parser.expect('php-code');
          var spaceIndex = tok.val.indexOf(' ');
          var splitted;
          if (spaceIndex === -1) {
            splitted = [tok.val, ''];
          } else {
            splitted = [
              tok.val.slice(0, spaceIndex),
              tok.val.slice(spaceIndex).trim()
            ];
          }
          var value = '';
          switch (splitted[0]) {
            case 'if':
            case 'for':
            case 'elseif':
              value = splitted[0] + ' (' + splitted[1] + ')';
              break;
            case 'else':
              value = splitted[0];
              if (splitted[1]) {
                parser.error('PHP:INVALID_EXPRESSION', 'unexpected code', {
                  line: tok.line,
                  col: tok.col + splitted[0].length + 2
                });
              }
              break;
            case '':
              value = splitted[1];
              break;
            default:
              value = splitted.join(' ');
          }
          var block = parser.peek().type === 'indent' ? parser.block() : null;
          var tail = '';
          if (block) {
            value += ' {';
            tail = '}';
          }
          // we don't have code generator plugins yet, so we have to output
          // AST nodes that pug-code-gen can digest
          var node = {
            type: 'Text',
            val: '<?php ' + value + ' ?>',
            line: tok.line,
            filename: parser.filename,
            isHtml: true
          };
          if (block) {
            block.nodes.unshift(node);
            if (tail) {
              block.nodes.push({
                type: 'Text',
                val: '<?php ' + tail + ' ?>',
                line: tok.line,
                filename: parser.filename,
                isHtml: true
              });
            }
            return block;
          } else {
            return node;
          }
        }
      }
    }
  };
};