(Tcl) WhatsApp - Send a Text Message

Demonstrates how to use the messages endpoint to send text messages to your customers.

For more information, see https://developers.facebook.com/docs/whatsapp/api/messages/text

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load ./chilkat.dll

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

set http [new_CkHttp]

# Implements the following CURL command:

# curl -X POST https://example.com/v1/messages \
#   -H "Authorization: Bearer your-auth-token" \
#   -d '
# {
#     "preview_url": false,
#     "recipient_type": "individual",
#     "to": "whatsapp-id-or-group-id",
#     "type": "text",
#     "text": {
#         "body": "your-text-message-content"
#     }
# }'

# Use the following online tool to generate HTTP code from a CURL command
# Convert a cURL Command to HTTP Source Code

# Use this online tool to generate code from sample JSON:
# Generate Code to Create JSON

# The following JSON is sent in the request body.

# {
#   "preview_url": false,
#   "recipient_type": "individual",
#   "to": "whatsapp-id-or-group-id",
#   "type": "text",
#   "text": {
#     "body": "your-text-message-content"
#   }
# }

set json [new_CkJsonObject]

CkJsonObject_UpdateBool $json "preview_url" 0
CkJsonObject_UpdateString $json "recipient_type" "individual"
CkJsonObject_UpdateString $json "to" "whatsapp-id-or-group-id"
CkJsonObject_UpdateString $json "type" "text"
CkJsonObject_UpdateString $json "text.body" "your-text-message-content"

# Adds the "Authorization: Bearer your-auth-token" header.
CkHttp_put_AuthToken $http "your-auth-token"

# resp is a CkHttpResponse
set resp [CkHttp_PostJson3 $http "https://example.com/v1/messages" "application/json" $json]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkJsonObject $json
    exit
}

set sbResponseBody [new_CkStringBuilder]

CkHttpResponse_GetBodySb $resp $sbResponseBody
set jResp [new_CkJsonObject]

CkJsonObject_LoadSb $jResp $sbResponseBody
CkJsonObject_put_EmitCompact $jResp 0

puts "Response Body:"
puts [CkJsonObject_emit $jResp]

set respStatusCode [CkHttpResponse_get_StatusCode $resp]
puts "Response Status Code = $respStatusCode"
if {$respStatusCode >= 400} then {
    puts "Response Header:"
    puts [CkHttpResponse_header $resp]
    puts "Failed."
    delete_CkHttpResponse $resp

    delete_CkHttp $http
    delete_CkJsonObject $json
    delete_CkStringBuilder $sbResponseBody
    delete_CkJsonObject $jResp
    exit
}

delete_CkHttpResponse $resp

# Sample JSON response:
# (Sample code for parsing the JSON response is shown below)

# {
#   "messages": [
#     {
#       "id": "gBEGkYiEB1VXAglK1ZEqA1YKPrU"
#     }
#   ]
# }

# Sample code for parsing the JSON response...
# Use the following online tool to generate parsing code from sample JSON:
# Generate Parsing Code from JSON

set i 0
set count_i [CkJsonObject_SizeOfArray $jResp "messages"]
while {$i < $count_i} {
    CkJsonObject_put_I $jResp $i
    set id [CkJsonObject_stringOf $jResp "messages[i].id"]
    set i [expr $i + 1]
}

delete_CkHttp $http
delete_CkJsonObject $json
delete_CkStringBuilder $sbResponseBody
delete_CkJsonObject $jResp