(Swift 3,4,5...) Find Contact Having Email Address

Demonstrates how to fetch the Google Contact for a given email address.

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 retrieve the contacts, we need to send the following:

    // 	GET /m8/feeds/contacts/default/full?q=<emailAddress>
    // 	GData-Version: 3.0

    // Get the contact (or contacts) with this email address:
    var emailAddressToFind: String? = "admin@chilkatsoft.com"

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

    let sbResponseBody = CkoStringBuilder()!
    success = rest.fullRequestNoBodySb("GET", uriPath: "/m8/feeds/contacts/default/full", 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)

    // See below for a sample response body.
    xml.save("qa_output/google_contacts.xml")

    // 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.
    var totalResults: Int = xml.getChildIntValue("openSearch:totalResults").intValue
    var startIndex: Int = xml.getChildIntValue("openSearch:startIndex").intValue
    var itemsPerPage: Int = xml.getChildIntValue("openSearch:itemsPerPage").intValue
    print("totalResults = \(totalResults)")
    print("startIndex = \(startIndex)")
    print("itemsPerPage = \(itemsPerPage)")

    // We'll borrow a method from FileAccess to get the contactId from the URL string (see the code in the while loop)
    let fac = CkoFileAccess()!

    // Iterate over each contact.
    var numEntries: Int = xml.numChildrenHavingTag("entry").intValue
    var i: Int = 0
    while i < numEntries {
        xml.i = i
        print("\(i + 1) ----")
        print("title: \(xml.getChildContent("entry[i]|title")!)")

        // The entry "id" child contains a URL having this format:
        // <id>http://www.google.com/m8/feeds/contacts/{userEmail}/base/{contactId}</id>
        // Let's get the URL and parse the contactId from it..
        var idUrl: String? = xml.getChildContent("entry[i]|id")
        print("id: \(idUrl!)")

        // Use the parsing ability of GetFileName to get the contactId
        var contactId: String? = fac.getFileName(idUrl)
        print("contactId: \(contactId!)")

        var fullName: String? = xml.chilkatPath("entry[i]|gd:name|gd:fullName|*")
        if xml.lastMethodSuccess == true {
            print("fullName: \(fullName!)")
        }

        var emailAddress: String? = xml.chilkatPath("entry[i]|gd:email|(address)")
        if xml.lastMethodSuccess == true {
            print("email address: \(emailAddress!)")
        }

        i = i + 1
    }


}