function checkIdxBindingNode()

in packages/babel-plugin-idx/src/babel-plugin-idx.js [54:108]

• 40 lines of code
• 11 McCabe index (conditional complexity)

  function checkIdxBindingNode(file, node) {
    if (t.isImportDeclaration(node)) {
      // E.g. `import '...'`
      if (node.specifiers.length === 0) {
        throw file.buildCodeFrameError(
          node,
          'The idx import must have a value.',
        );
      }
      // E.g. `import A, {B} from '...'`
      //      `import A, * as B from '...'`
      //      `import {A, B} from '...'`
      if (node.specifiers.length > 1) {
        throw file.buildCodeFrameError(
          node.specifiers[1],
          'The idx import must be a single specifier.',
        );
      }
      // `import {default as idx} from '...'` or `import idx from '...'` are ok.
      // `import idx, * as idx2 from '...'` is not ok but would've been caught
      // above.
      if (!t.isSpecifierDefault(node.specifiers[0])) {
        throw file.buildCodeFrameError(
          node.specifiers[0],
          'The idx import must be a default import.',
        );
      }
      // `importKind` is not a property unless flow syntax is enabled.
      // On specifiers, `importKind` is not "value" when it's not a type, it's
      // `null`.
      // E.g. `import type {...} from '...'`
      //      `import typeof {...} from '...'`
      //      `import {type ...} from '...'`.
      //      `import {typeof ...} from '...'`
      if (
        node.importKind === 'type' ||
        node.importKind === 'typeof' ||
        node.specifiers[0].importKind === 'type' ||
        node.specifiers[0].importKind === 'typeof'
      ) {
        throw file.buildCodeFrameError(
          node,
          'The idx import must be a value import.',
        );
      }
    } else if (t.isVariableDeclarator(node)) {
      // E.g. var {idx} or var [idx]
      if (!t.isIdentifier(node.id)) {
        throw file.buildCodeFrameError(
          node.specifiers[0],
          'The idx declaration must be an identifier.',
        );
      }
    }
  }