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June 12, 2014 19:55
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| // Playground - noun: a place where people can play | |
| import Cocoa | |
| // Base class for parameters to POST to service | |
| class APIParams { | |
| func getData() -> Dictionary<String, AnyObject> { | |
| return Dictionary<String, AnyObject>() | |
| } | |
| } | |
| // Base class for parsing a JSON Response | |
| class APIResult { | |
| func parseData(data: AnyObject?) { | |
| } | |
| } | |
| // Derived example for a login service | |
| class DerivedAPIParams: APIParams { | |
| var user = "some@one.com" | |
| var pass = "secret" | |
| // THIS METHOD IS CALLED CORRECTLY | |
| override func getData() -> Dictionary<String, AnyObject> { | |
| return [ "user": user, "pass": pass ] | |
| } | |
| } | |
| // Derived example for parsing a login response | |
| class DerivedAPIResult: APIResult { | |
| var success = false | |
| var token:String? = "" | |
| // THIS METHOD IS NEVER CALLED | |
| override func parseData(data: AnyObject?) { | |
| /* | |
| self.success = data!.valueForKey("success") as Bool | |
| self.token = data!.valueForKey("token") as? String | |
| */ | |
| self.success = true | |
| self.token = "1234" | |
| } | |
| } | |
| class APIOperation<TParams: APIParams, TResult: APIResult> { | |
| var url = "http://localhost:3000" | |
| func request(params: TParams, done: (NSError?, TResult?) -> ()) { | |
| let resultHandler = { (error: NSError?, response: NSHTTPURLResponse?, data: AnyObject?) -> () in | |
| if (error) { | |
| done(error, nil) | |
| return | |
| } | |
| let parsed = self.parseResult(data) | |
| done(nil, parsed) | |
| }; | |
| let paramData = params.getData() | |
| // ... snip making a request to website ... | |
| let result = self.parseResult(nil) | |
| done(nil, result) | |
| } | |
| func parseResult(data: AnyObject?) -> TResult { | |
| var result = TResult.self() | |
| // This should call the derived implementation if passed, right? | |
| result.parseData(data) | |
| return result | |
| } | |
| } | |
| let derivedOp = APIOperation<DerivedAPIParams, DerivedAPIResult>() | |
| let params = DerivedAPIParams() | |
| derivedOp.request(params) {(error, result) in | |
| if result? { | |
| result!.success | |
| } | |
| } |
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