(Swift 3,4,5...) Google Contacts - Delete a Contact

Demonstrates how to delete a Google Contact.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // 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

    let jsonToken = CkoJsonObject()!
    var success: Bool = jsonToken.loadFile("qa_data/tokens/googleContacts.json")
    if success != true {
        print("Failed to load googleContacts.json")
        return
    }

    let gAuth = CkoAuthGoogle()!
    gAuth.accessToken = jsonToken.string(of: "access_token")

    let rest = CkoRest()!

    // Connect using TLS.
    var bAutoReconnect: Bool = true
    success = rest.connect("www.google.com", port: 443, tls: true, autoReconnect: bAutoReconnect)

    // Provide the authentication credentials (i.e. the access token)
    rest.setAuthGoogle(gAuth)

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

    // To update a contact, we'll first get the contact information
    // to get the etag.

    // To retrieve the contact, send the following:
    // 	GET /m8/feeds/contacts/default/full/{contactId}
    // 	GData-Version: 3.0

    rest.addHeader("GData-Version", value: "3.0")

    let sbPath = CkoStringBuilder()!
    sbPath.append("/m8/feeds/contacts/default/full/{contactId}")
    // Get the contact having contactId = "5b6d64980b1ed462"
    var numReplacements: Int = sbPath.replace("{contactId}", replacement: "5b6d64980b1ed462").intValue

    let sbResponseBody = CkoStringBuilder()!
    success = rest.fullRequestNoBodySb("GET", uriPath: sbPath.getAsString(), sb: sbResponseBody)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.responseStatusCode.intValue != 200 {
        print("response status code = \(rest.responseStatusCode.intValue)")
        print("response status text = \(rest.responseStatusText!)")
        print("response header: \(rest.responseHeader!)")
        print("response body: \(sbResponseBody.getAsString()!)")
        return
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    let xml = CkoXml()!
    xml.loadSb(sbResponseBody, autoTrim: false)

    print("\(xml.getXml()!)")
    print("-------------------")

    // Get the etag:
    var lastKnownEtag: String? = xml.getAttrValue("gd:etag")
    print("lastKnownEtag = \(lastKnownEtag!)")
    print("-------------------")

    // To delete, send the following:

    // 	DELETE /m8/feeds/contacts/default/full/{contactId}
    // 	If-Match: {lastKnownEtag}
    // 	GData-Version: 3.0

    rest.clearAllHeaders()
    rest.addHeader("If-Match", value: lastKnownEtag)
    rest.addHeader("GData-Version", value: "3.0")

    // The sbPath already contains the correct path..
    success = rest.fullRequestNoBodySb("DELETE", uriPath: sbPath.getAsString(), sb: sbResponseBody)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.responseStatusCode.intValue != 200 {
        print("response status code = \(rest.responseStatusCode.intValue)")
        print("response status text = \(rest.responseStatusText!)")
        print("response header: \(rest.responseHeader!)")
        print("response body: \(sbResponseBody.getAsString()!)")
        print("request header: \(rest.lastRequestHeader!)")
        return
    }

    // The response body for a successful DELETE is empty.
    print("Response Body: (should be empty)")
    print("\(sbResponseBody.getAsString()!)")
    print("Success.")

}