feat: added case for the extension to validate the file (#807)

Co-authored-by: Aayush <[email protected]>%0ACo-authored-by: souvik <[email protected]>

src/errors/specification-file.ts

@@ -24,7 +24,7 @@ export class SpecificationURLNotFound extends SpecificationFileError {
  }
 }
 
-type From = 'file' | 'url' | 'context'
+type From = 'file' | 'url' | 'context' | 'invalid file'
 
 export class ErrorLoadingSpec extends Error {
  private readonly errorMessages = {
@@ -35,14 +35,18 @@ export class ErrorLoadingSpec extends Error {
  if (from === 'file') {
  this.name = 'error loading AsyncAPI document from file';
  this.message = `${param} file does not exist.`;
- }
+ } 
  if (from === 'url') {
  this.name = 'error loading AsyncAPI document from url';
  this.message = `Failed to download ${param}.`;
- }
+ } 
  if (from === 'context') {
  this.name = 'error loading AsyncAPI document from context';
  this.message = `${param} context name does not exist.`;
+ } 
+ if (from === 'invalid file') {
+ this.name = 'Invalid AsyncAPI file type';
+ this.message = 'cli only supports yml ,yaml ,json extension';
  }
 
  if (!from) {

src/models/SpecificationFile.ts

@@ -185,6 +185,15 @@ export async function fileExists(name: string): Promise<boolean> {
  if ((await lstat(name)).isFile()) {
  return true;
  }
+
+ const extension = name.split('.')[1];
+
+ const allowedExtenstion=['yml','yaml','json'];
+
+ if (!allowedExtenstion.includes(extension)) {
+ throw new ErrorLoadingSpec('invalid file',name);
+ }
+
  throw new ErrorLoadingSpec('file', name);
  } catch (e) {
  throw new ErrorLoadingSpec('file', name);