Function extractMessageDescriptor

packages/ts-transformer/transform.ts:296–641

(
  ts: TypeScript,
  node:
    | typescript.ObjectLiteralExpression
    | typescript.JsxOpeningElement
    | typescript.JsxSelfClosingElement,
  {
    overrideIdFn,
    extractSourceLocation,
    preserveWhitespace,
    flatten,
    throws = true,
    onMsgError,
  }: Opts,
  sf: typescript.SourceFile
)

}

function extractMessageDescriptor(
  ts: TypeScript,
  node:
    | typescript.ObjectLiteralExpression
    | typescript.JsxOpeningElement
    | typescript.JsxSelfClosingElement,
  {
    overrideIdFn,
    extractSourceLocation,
    preserveWhitespace,
    flatten,
    throws = true,
    onMsgError,
  }: Opts,
  sf: typescript.SourceFile
): MessageDescriptor | undefined {
  let extractionError: Error | null = null

  // Helper to handle errors based on throws option
  function handleError(errorMsg: string, errorNode?: typescript.Node): void {
    let locationMsg = errorMsg
    if (errorNode) {
      const {line, character} = ts.getLineAndCharacterOfPosition(
        sf,
        errorNode.getStart(sf)
      )
      locationMsg = `${sf.fileName}:${line + 1}:${character + 1} ${errorMsg}`
    }
    const error = new Error(locationMsg)
    if (throws) {
      throw error
    }
    extractionError = error
    if (onMsgError) {
      onMsgError(sf.fileName, error)
    }
  }
  let properties:
    | typescript.NodeArray<typescript.ObjectLiteralElement>
    | typescript.NodeArray<typescript.JsxAttributeLike>
    | undefined = undefined
  if (ts.isObjectLiteralExpression(node)) {
    properties = node.properties
  } else if (ts.isJsxOpeningElement(node) || ts.isJsxSelfClosingElement(node)) {
    properties = node.attributes.properties
  }
  const msg: MessageDescriptor = {id: ''}
  if (!properties) {
    return
  }

  properties.forEach(prop => {
    const {name} = prop
    const initializer:
      | typescript.Expression
      | typescript.JsxExpression
      | undefined =
      ts.isPropertyAssignment(prop) || ts.isJsxAttribute(prop)