param()

in packages/babel-plugin-fbt/src/getNamespacedArgs.js [42:95]

• 39 lines of code
• 10 McCabe index (conditional complexity)

    param(node) {
      const attributes = node.openingElement.attributes;
      const nameAttr = getAttributeByNameOrThrow(attributes, 'name');
      const options = getOptionsFromAttributes(
        t,
        attributes,
        ValidParamOptions,
        RequiredParamOptions,
      );

      let paramChildren = filterEmptyNodes(node.children).filter(function (
        child,
      ) {
        return (
          child.type === 'JSXExpressionContainer' || child.type === 'JSXElement'
        );
      });

      // <fbt:param> </fbt:param>
      // should be the equivalent of
      // <fbt:param>{' '}</fbt:param>
      if (
        paramChildren.length === 0 &&
        node.children.length === 1 &&
        node.children[0].type === 'JSXText' &&
        node.children[0].value === ' '
      ) {
        paramChildren = [
          jsxExpressionContainer(stringLiteral(node.children[0].value)),
        ];
      }

      if (paramChildren.length !== 1) {
        throw errorAt(
          node,
          `${moduleName}:param expects an {expression} or JSX element, and only one`,
        );
      }

      const nameAttrValue = nameAttr.value;
      if (nameAttrValue.loc.end.line > nameAttrValue.loc.start.line) {
        nameAttrValue.value = normalizeSpaces(nameAttrValue.value);
      }
      const paramArgs = [
        nameAttrValue,
        paramChildren[0].expression || paramChildren[0],
      ];

      if (options.properties.length > 0) {
        paramArgs.push(options);
      }

      return paramArgs;
    },