(Tcl) Page Through All Contacts

Demonstrates how to page through the entire list of Google Contacts.

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load ./chilkat.dll

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

# --------------------------------------------------------------------------------------------------------
# Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
# Once connected, the REST object may be re-used for many REST API calls.
# (It's a good idea to put the connection setup code in a separate function/subroutine.)
# --------------------------------------------------------------------------------------------------------

# It is assumed we previously obtained an OAuth2 access token.
# This example loads the JSON access token file 
# saved by this example: Get Google Contacts OAuth2 Access Token

set jsonToken [new_CkJsonObject]

set success [CkJsonObject_LoadFile $jsonToken "qa_data/tokens/googleContacts.json"]
if {$success != 1} then {
    puts "Failed to load googleContacts.json"
    delete_CkJsonObject $jsonToken
    exit
}

set gAuth [new_CkAuthGoogle]

CkAuthGoogle_put_AccessToken $gAuth [CkJsonObject_stringOf $jsonToken "access_token"]

set rest [new_CkRest]

# Connect using TLS.
set bAutoReconnect 1
set success [CkRest_Connect $rest "www.google.com" 443 1 $bAutoReconnect]

# Provide the authentication credentials (i.e. the access token)
CkRest_SetAuthGoogle $rest $gAuth

# ----------------------------------------------
# OK, the REST connection setup is completed..
# ----------------------------------------------

set startIndex 1
set maxResults 25
# The totalResults will get updated with the correct value in the 1st loop iteration..
set totalResults 100
# To retrieve the contacts in pages of 25 each, we need to send the following for each page.

# 	GET /m8/feeds/contacts/default/full?max-results=25&start-index=<startIndex>
# 	GData-Version: 3.0

set sbMaxResults [new_CkStringBuilder]

CkStringBuilder_AppendInt $sbMaxResults $maxResults
set sbStartIndex [new_CkStringBuilder]

set loopIteration 0
while {$startIndex <= $totalResults} {

    CkStringBuilder_Clear $sbStartIndex
    CkStringBuilder_AppendInt $sbStartIndex $startIndex

    CkRest_ClearAllHeaders $rest
    CkRest_ClearAllQueryParams $rest
    CkRest_AddHeader $rest "GData-Version" "3.0"
    CkRest_AddQueryParam $rest "start-index" [CkStringBuilder_getAsString $sbStartIndex]
    CkRest_AddQueryParam $rest "max-results" [CkStringBuilder_getAsString $sbMaxResults]

    set sbResponseBody [new_CkStringBuilder]

    set success [CkRest_FullRequestNoBodySb $rest "GET" "/m8/feeds/contacts/default/full" $sbResponseBody]
    if {$success != 1} then {
        puts [CkRest_lastErrorText $rest]
        delete_CkJsonObject $jsonToken
        delete_CkAuthGoogle $gAuth
        delete_CkRest $rest
        delete_CkStringBuilder $sbMaxResults
        delete_CkStringBuilder $sbStartIndex
        delete_CkStringBuilder $sbResponseBody
        exit
    }

    # A successful response will have a status code equal to 200.
    if {[CkRest_get_ResponseStatusCode $rest] != 200} then {
        puts "response status code = [CkRest_get_ResponseStatusCode $rest]"
        puts "response status text = [CkRest_responseStatusText $rest]"
        puts "response header: [CkRest_responseHeader $rest]"
        puts "response body: [CkStringBuilder_getAsString $sbResponseBody]"
        delete_CkJsonObject $jsonToken
        delete_CkAuthGoogle $gAuth
        delete_CkRest $rest
        delete_CkStringBuilder $sbMaxResults
        delete_CkStringBuilder $sbStartIndex
        delete_CkStringBuilder $sbResponseBody
        exit
    }

    # If the 200 response was received, then the contacts XML is contained
    # in the response body.
    set xml [new_CkXml]

    CkXml_LoadSb $xml $sbResponseBody 0

    # Now let's parse the XML...

    # Get the the total number of results, the start index, and the items per page.
    # We'll likely NOT get the full list, but will instead get the 1st page.
    set totalResults [CkXml_GetChildIntValue $xml "openSearch:totalResults"]
    set startIndex2 [CkXml_GetChildIntValue $xml "openSearch:startIndex"]
    set itemsPerPage [CkXml_GetChildIntValue $xml "openSearch:itemsPerPage"]
    puts "totalResults = $totalResults"
    puts "startIndex = $startIndex2"
    puts "itemsPerPage = $itemsPerPage"

    # Iterate over each contact.
    set numEntries [CkXml_NumChildrenHavingTag $xml "entry"]
    set i 0
    while {$i < $numEntries} {
        CkXml_put_I $xml $i
        puts [expr [expr $loopIteration * $maxResults] + [expr $i + 1]] ----
        puts "title: [CkXml_getChildContent $xml {entry[i]|title}]"

        set idUrl [CkXml_getChildContent $xml "entry[i]|id"]
        puts "id: $idUrl"

        set fullName [CkXml_chilkatPath $xml "entry[i]|gd:name|gd:fullName|*"]
        if {[CkXml_get_LastMethodSuccess $xml] == 1} then {
            puts "fullName: $fullName"
        }

        set emailAddress [CkXml_chilkatPath $xml "entry[i]|gd:email|(address)"]
        if {[CkXml_get_LastMethodSuccess $xml] == 1} then {
            puts "email address: $emailAddress"
        }

        # Find the photo link and check to see if this contact has a photo.
        # xLink is a CkXml
        set xLink [CkXml_GetChildWithAttr $xml "link" "rel" "http://schemas.google.com/contacts/2008/rel#photo"]
        if {[CkXml_get_LastMethodSuccess $xml] == 1} then {
            # Get the photo etag.
            set bHasPhoto [CkXml_HasAttribute $xLink "gd:etag"]
            if {$bHasPhoto == 1} then {
                puts "This contact has a photo."
            }

            delete_CkXml $xLink

        }

        set i [expr $i + 1]
    }

    set startIndex [expr $startIndex + $maxResults]
    set loopIteration [expr $loopIteration + 1]
}

delete_CkJsonObject $jsonToken
delete_CkAuthGoogle $gAuth
delete_CkRest $rest
delete_CkStringBuilder $sbMaxResults
delete_CkStringBuilder $sbStartIndex
delete_CkStringBuilder $sbResponseBody
delete_CkXml $xml