Accessing custom method from signatureservice is not working

[atirtahirgroupdocs]

This issue is raised here https://forum.groupdocs.com/t/digital-signature-application-compatibility-with-internet-explorer-using-spring-java/7898/48.

Hi,

1. User cloned groupdocstotal-angular project and copied signature and common-components folder into my project as per the advanced scenario mentioned here
2. To render the uploaded document, user called super.selectFile() in custom component
3. Now, user wants to access a method called sign() in signatureservice but not sure how to achieve this

Have a look at this screenshot.

Summary: Have a look at the attached code (code.txt). User is able to successfully render the document by calling selectFile() method. User wants to modify few things in this service sign() from SignatureService.ts and call it explicitly in my Component. Have a look at this image. How can we do it?. Please assist.
code.txt

[Pavel-Teplitsky]

Hi @atirtahirgroupdocs thank you for your question.

To customize sign action try the following:

1. Create a custom document signing action. For example:

   signDocument() {
   //this.prepareSignaturesData() is taken from parent component 
   const signatures = this.prepareSignaturesData();
   //this.credentials.password is taken from parent component
   this.password = this.credentials.password;
   const docType = FileUtil.find(this.currentFile.Name).format;
   //this.guid - is a file name or any other string data to determine which file is currently signing
   this._appService.sign(this.guid, signatures, docType, this.password).subscribe((file: any) => {
   //do something with responce
   });
   }

2. Create custom action to send sign document API call. In the code example from step 1 it's a _this._appService.sign()_ action. For example:

   
   sign(documentGuid: string, signatures: any[], fileType: string, password: string) {
   return this._http.post(this._config.getProductsApiEndpoint() + urlToApiAction, {
     guid: hash,
     password: password,
     signaturesData: signatures,
     documentType: fileType,
   }, Api.httpOptionsJson);
   }

3. Set this action to sign button in html template like shown on the screenshot above.
![screenshot](https://user-images.githubusercontent.com/2689279/102060451-ddf6f600-3dfa-11eb-80f4-2bef5738817c.png)