Prerequisites

You need pdf.js available as external library on your Simplifier instance:

Step 1 – Client-side Business Object

Create a client-side Business Object (BO) function call for implementing the logic of the full-text search:

// input: 'base64' (String), 'searchValue' (String)
// output: 'result' (Boolean)
var base64 = oPayload.base64;
base64 = base64.replace("data:application/pdf;base64,", "");

var pdfData = atob(base64);

function searchPage(doc, pageNumber) {
      return doc.getPage(pageNumber).then(function(page){
         return page.getTextContent();}).then(function(content) {
                    var text = content.items.map(function(i) {return i.str;}).join('');
                    var re = new RegExp(oPayload.searchValue);
                    return re.test(text);});
}
var loading = pdfjsLib.getDocument({data: pdfData});
loading.promise.then(async function(doc) {
       var result = false;
       for (var i = 1; i <= doc.numPages; i++) {
            result = await searchPage(doc, i);
            if (result) {
                break;
            }
       }
       return result;}).then(function(searchResult) {
           fnSuccess({
               result: searchResult
           })
}).catch(console.error);

Step 2 – Application Editor: Add pdf.js As External Library

Add pdf.js as external library to your Simplifier app (Knowledge Base article):

Step 3 – UI Designer: User Input

Use the FileUploader (1) widget, so that the user can select a PDF document to analyze. In addition, add an Input (2) widget for entering the search value. With the ‘search’-Button (3) the user starts the full-text search.

Step 4 – Process Designer: Story

Create a story for the workflow:

1. Subscribe to ‘search’-Button’s press event
2. Extract file from FileUploader using a script block:

   // replace "FileUploader" with the ID of your FileUploader widget
   var uploaderInput = this.getView().byId("FileUploader");
   
   if (uploaderInput.getValue() !== "") {
       var files = uploaderInput.oFileUpload.files;
   
       if (files.length === 1) {
           var file = files[0];
       }
   }
   // create a global variable "uploaderFile" (String) to store the file 
   this.getGlobals().setVar("uploaderFile", file);

3.  Use the ‘readFileAsDataUrl’ function call from the ‘SIMP_FileHelper’ BO to get the base64-String of the selected PDF document
   1. Input: ‘uploaderFile’ (global variable)
   2. Output: ‘base64’ (new global variable, String)
4. Use your client-side ‘fullTextSearch’ function call from Step 1 to get the result of the full-text search
   1. Input: ‘base64’ (global variable),  search ‘value’ (input widget)
   2. Output: full-text search ‘result’

Step 4 – Result

To display the result you can use an ObjectStatus widget and specify the state and icon property with a condition shape in the process designer (1):

1. status = ‘Success’ in case of a positive result (true) (2)
2. status = ‘Error’ in case of a negative result (false) (3)