(Swift 3,4,5...) Shopify GraphQL Simple Query (Get Shop Object)

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Demonstrates a simple Shopify GraphQL query to get specific fields of the Shop object.

For more information, see https://www.shopify.com/partners/blog/shopify-graphql-learning-kit#query-structure

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let http = CkoHttp()!

    // This example will use private authentication (which is HTTP Basic authentication)
    // See the other Chilkat Shopify examples for OAuth2 authentication.
    // To use HTTP Basic Authentication with any HTTP request, we simply set the Login, Password, and BasicAuth properties.
    // Important: All HTTP requests using Basic authentication must be over SSL/TLS.
    http.login = "SHOPIFY_PRIVATE_API_KEY"
    http.password = "SHOPIFY_PRIVATE_API_SECRET_KEY"
    http.basicAuth = true

    // We're going to do a POST  https://{shop}.myshopify.com/admin/api/2021-04/graphql.json
    // Make sure to replace "chilkat" with your store name.

    // The body of the request will be:
    //    {
    //        shop {
    //            id
    //            name
    //            description
    //            email
    //         }
    //     }

    // The above query is not JSON.  It looks like JSON, but it's actually not.
    // We'll just make it one line:

    var query: String? = "{ shop { id name description email } }"

    // My store name is "chilkat".  Use your store name here instead.
    var url: String? = "https://chilkat.myshopify.com/admin/api/2021-04/graphql.json"

    var resp: CkoHttpResponse? = http.pText("POST", url: url, textData: query, charset: "utf-8", contentType: "application/graphql", md5: false, gzip: false)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    // Examine the response code.
    if resp!.statusCode.intValue != 200 {
        print("Received error response code: \(resp!.statusCode.intValue)")
        print("Response body:")
        print("\(resp!.bodyStr!)")
        resp = nil
        return
    }

    let sbResponseBody = CkoStringBuilder()!
    resp!.getBodySb(sbResponseBody)
    let jResp = CkoJsonObject()!
    jResp.loadSb(sbResponseBody)
    jResp.emitCompact = false

    print("Response Body:")
    print("\(jResp.emit()!)")

    var respStatusCode: Int = resp!.statusCode.intValue
    print("Response Status Code = \(respStatusCode)")
    if respStatusCode >= 400 {
        print("Response Header:")
        print("\(resp!.header!)")
        print("Failed.")
        resp = nil
        return
    }

    resp = nil

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

    // {
    //   "data": {
    //     "shop": {
    //       "id": "gid:\/\/shopify\/Shop\/24198053",
    //       "name": "chilkat",
    //       "description": null,
    //       "email": "admin@chilkatsoft.com"
    //     }
    //   },
    //   "extensions": {
    //     "cost": {
    //       "requestedQueryCost": 1,
    //       "actualQueryCost": 1,
    //       "throttleStatus": {
    //         "maximumAvailable": 1000.0,
    //         "currentlyAvailable": 999,
    //         "restoreRate": 50.0
    //       }
    //     }
    //   }
    // }

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

    var shopId: String? = jResp.string(of: "data.shop.id")
    var shopName: String? = jResp.string(of: "data.shop.name")
    var shopDescription: String? = jResp.string(of: "data.shop.description")
    var shopEmail: String? = jResp.string(of: "data.shop.email")
    var costRequestedQueryCost: Int = jResp.int(of: "extensions.cost.requestedQueryCost").intValue
    var costActualQueryCost: Int = jResp.int(of: "extensions.cost.actualQueryCost").intValue
    var costThrottleStatusMaximumAvailable: String? = jResp.string(of: "extensions.cost.throttleStatus.maximumAvailable")
    var costThrottleStatusCurrentlyAvailable: Int = jResp.int(of: "extensions.cost.throttleStatus.currentlyAvailable").intValue
    var costThrottleStatusRestoreRate: String? = jResp.string(of: "extensions.cost.throttleStatus.restoreRate")

    print("Shop name: \(shopName!)")
    // ...

}