(AutoIt) IMAP Search with THREAD Semantics

Demonstrates how to search an IMAP mailbox and return message numbers grouped together in parent/child relationships based on which messages are replies to others.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

$oImap = ObjCreate("Chilkat.Imap")

; Connect to your IMAP server and authenticate..
$oImap.Ssl = True
$oImap.Port = 993
Local $bSuccess = $oImap.Connect("imap.mail.us-west-2.awsapps.com")
If ($bSuccess <> True) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oImap.Login("myLogin","myPassword")
If ($bSuccess <> True) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

; Select a mailbox
$bSuccess = $oImap.SelectMailbox("Inbox")
If ($bSuccess <> True) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

; Search for all message having the letter 'a' somewhere in the Subject,
; and return the messages as JSON.
Local $oJson = $oImap.ThreadCmd("REFERENCES","UTF-8","SUBJECT a",True)
If ($oImap.LastMethodSuccess = False) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

; The IMAP server will return a raw response with a format such as this:  (2)(3 6 (4 23)(44 7 96))

; In tree form, it's like this:
; 
;             -- 2
;             -- 3
;                 \-- 6
;                    |-- 4
;                    |      \-- 23
;                    |
;                    |-- 44
;                               \-- 7
;                                       \-- 96
; 

; It means there are 2 main threads returned, but the 2nd thread splits into two sub-threads.
; In total, we can think of it as 3 threads -- 2 main threads (with no parents) and one sub-thread w/ a parent.
; 
; - The 1st thread contains the message 2, and has no parent thread.
; - The 2nd thread contains the messages 3, 6, 4, 23, and has no parent thread.
; - The 3rd thread contains the messages 44, 7, 96 and the parent thread is message 6.
; 

; (Yes, this is all highly confusing...)

; Chilkat will return the above sample response as JSON that looks like this:

; {
;   "threads": [
;     [2],
;     [3, 6, [4, 23], [44, 7, 96]]
;   ]
; }
; 

; Use this online tool to generate parsing code from sample JSON: 
; Generate Parsing Code from JSON
; In this case, the online tool can help you get a feel for how to write the JSON parsing code..

Local $iNumThreads = $oJson.SizeOfArray("threads")
ConsoleWrite("The total number of top-level threads is " & $iNumThreads & @CRLF)

; Let's say we wanted to get the messages in the thread 3, 6, 4, 23.
; We always follow the 1st branch to the bottom, ignoring the other branches.
; For example, if we had  [3, 5, [4, 23, [55, 56, 57], [68, 69]], [44, 7, 96]]
; then the thread would be 3, 5, 4, 43, 55, 56, 57

; For testing, let's substitute the response from the IMAP server with this sample:
$oJson.Load("{""threads"": [[2], [3, 5, [4, 23, [55, 56, 57], [68, 69]], [44, 7, 96]]]}")

; Begin with the 2nd top-level thread, which is at index 1.
ConsoleWrite("Following the 2nd top level thread..." & @CRLF)
Local $oArr = $oJson.ArrayOf("threads[1]")
Local $iThreadSize = $oArr.Size
Local $i = 0
While $i < $iThreadSize
    ; Do we have an array or integer at this position?
    If ($oArr.TypeAt($i) = 4) Then
        ; This is a sub-array.
Local $oSubArr = $oArr.ArrayAt($i)

        ; Follow the sub-array starting at the 1st position..
        $oArr = $oSubArr
        $i = 0
        $iThreadSize = $oArr.Size
    Else
        ; Must be a single integer.
        ConsoleWrite($oArr.IntAt($i) & @CRLF)
        $i = $i + 1
    EndIf

Wend

; The output is:
; 
; Following the 2nd top level thread...
; 3
; 5
; 4
; 23
; 55
; 56
; 57