Imports System.Collections.Specialized
Imports System.IO
Imports System.Net
Imports System.Text
Imports System.Threading
Imports Newtonsoft.Json.Linq

Module Module1

    ' The authentication key (API Key).
    ' Get your own by registering at https://app.pdf.co
    Const API_KEY As String = "********************************"

    ' Sample document containing blood test report
    ' Report consists of sample patient information such as patinet name, DOB, patientID
    ' Report information such as report type, collection date And time
    ' Test components such as complete blood count, Hemoglobin, White Blood Cell (WBC), Red Blood Cell (RBC), etc.
    Const SourceFile As String = ".\SampleBloodReport.pdf"

    ' PDF document password. Leave empty for unprotected documents.
    Const Password As String = ""

    ' Destination TXT file name
    Const DestinationFile As String = ".\result.json"

    ' (!) Make asynchronous job
    Const Async As Boolean = True

    Sub Main()

        ' Template text. Use Document Parser (https://pdf.co/document-parser, https://app.pdf.co/document-parser)
        ' to create templates.
        ' Read template from file
        ' Sample template which primarily extracts patient name, report date And test result table.
        Dim templateText As String = File.ReadAllText("SampleBloodReport.yml")

        ' Create standard .NET web client instance
        Dim webClient As WebClient = New WebClient()

        ' Set API Key
        webClient.Headers.Add("x-api-key", API_KEY)

        ' 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE.
        ' * If you already have a direct file URL, skip to the step 3.

        ' Prepare URL for `Get Presigned URL` API call
        Dim query As String = Uri.EscapeUriString(String.Format(
            "https://api.pdf.co/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}",
            Path.GetFileName(SourceFile)))

        Try
            ' Execute request
            Dim response As String = webClient.DownloadString(query)

            ' Parse JSON response
            Dim json As JObject = JObject.Parse(response)

            If json("error").ToObject(Of Boolean) = False Then
                ' Get URL to use for the file upload
                Dim uploadUrl As String = json("presignedUrl").ToString()
                ' Get URL of uploaded file to use with later API calls
                Dim uploadedFileUrl As String = json("url").ToString()

                ' 2. UPLOAD THE FILE TO CLOUD.
                webClient.Headers.Add("content-type", "application/octet-stream")
                webClient.UploadFile(uploadUrl, "PUT", SourceFile) ' You can use UploadData() instead if your file is byte array or Stream

                ' 3. PARSE UPLOADED PDF DOCUMENT

                ' URL for `Document Parser` API call
                query = Uri.EscapeUriString(
                    String.Format("https://api.pdf.co/v1/pdf/documentparser?url={0}&async={1}", uploadedFileUrl, Async)
                    )

                Dim requestBody As New NameValueCollection()
                requestBody.Add("template", templateText)

                ' Execute request
                Dim responseBytes As Byte() = webClient.UploadValues(query, "POST", requestBody)
                response = Encoding.UTF8.GetString(responseBytes)

                ' Parse JSON response
                json = JObject.Parse(response)

                If json("error").ToObject(Of Boolean) = False Then

                    ' Asynchronous job ID
                    Dim jobId As String = json("jobId").ToString()
                    ' URL of generated PDF file that will available after the job completion
                    Dim resultFileUrl As String = json("url").ToString()

                    ' Check the job status in a loop. 
                    ' If you don't want to pause the main thread you can rework the code 
                    ' to use a separate thread for the status checking and completion.
                    Do
                        Dim status As String = CheckJobStatus(jobId) ' Possible statuses: "working", "failed", "aborted", "success".

                        ' Display timestamp and status (for demo purposes)
                        Console.WriteLine(DateTime.Now.ToLongTimeString() + ": " + status)

                        If status = "success" Then

                            ' Download PDF file
                            webClient.DownloadFile(resultFileUrl, DestinationFile)

                            Console.WriteLine("Generated JSON file saved as ""{0}"" file.", DestinationFile)
                            Exit Do

                        ElseIf status = "working" Then

                            ' Pause for a few seconds
                            Thread.Sleep(3000)

                        Else

                            Console.WriteLine(status)
                            Exit Do

                        End If

                    Loop

                Else
                    Console.WriteLine(json("message").ToString())
                End If

            End If

        Catch ex As WebException
            Console.WriteLine(ex.ToString())
        End Try

        webClient.Dispose()

        Console.WriteLine()
        Console.WriteLine("Press any key...")
        Console.ReadKey()

    End Sub


    Function CheckJobStatus(jobId As String) As String

        Using webClient As WebClient = New WebClient()

            ' Set API Key
            webClient.Headers.Add("x-api-key", API_KEY)

            Dim url As String = "https://api.pdf.co/v1/job/check?jobid=" + jobId

            Dim response As String = webClient.DownloadString(url)
            Dim json As JObject = JObject.Parse(response)

            Return Convert.ToString(json("status"))

        End Using

    End Function

End Module

templateName: BloodTestTemplate
templateVersion: 4
templatePriority: 0
detectionRules:
  keywords: []
objects:
- name: PatientName
  objectType: field
  fieldProperties:
    fieldType: rectangle
    rectangle:
    - 177.75
    - 123.75
    - 62.25
    - 12.75
    pageIndex: 0
- name: ReportName
  objectType: field
  fieldProperties:
    fieldType: rectangle
    expression: '{{SmartDate}}'
    dataType: date
    rectangle:
    - 335.25
    - 94.5
    - 65.25
    - 12
    pageIndex: 0
- name: TestResults
  objectType: table
  tableProperties:
    start:
      y: 261.75
      pageIndex: 0
    end:
      y: 712.5
      pageIndex: 0
    left: 41.25
    right: 573.75
    rowMergingRule: byBorders