1 files changed, 135 insertions, 0 deletions
diff --git a/Juick/Service.swift b/Juick/Service.swift
new file mode 100644
index 0000000..441451e
--- /dev/null
+++ b/Juick/Service.swift
@@ -0,0 +1,135 @@
+//
+//  Service.swift
+//  Juick
+//
+//  Created by Vitaly Takmazov on 16.09.2020.
+//  Copyright © 2020 com.juick. All rights reserved.
+//
+
+import Foundation
+
+class Service : NSObject, URLSessionDelegate, URLSessionTaskDelegate {
+    let backgroundQueue = OperationQueue()
+    
+    let baseURL : URL?
+    
+    lazy var authorizationHeader : String? = {
+        if let token = UserDefaults.standard.string(forKey: "token") {
+            return "Juick \(token)"
+        }
+        return nil;
+    }()
+    
+    override init() {
+        let baseURLString = Bundle.main.object(forInfoDictionaryKey:"base_url") as! String
+        debugPrint("Initializing with \(baseURLString) base URL")
+        self.baseURL = URL(string: baseURLString)
+        super.init()
+    }
+    func url(url:URL, params:[String: String]) -> URL {
+        let parametersUrl = NSURLComponents(url: url, resolvingAgainstBaseURL: true)
+        var items : [URLQueryItem] = []
+        for (key, value) in params {
+            items.append(URLQueryItem(name: key, value: value))
+        }
+        parametersUrl?.queryItems = items
+        return (parametersUrl?.url!)!
+    }
+    func fetchData(url:URL, postData:Data?, boundary:String?, header:String?, callback: @escaping (Data?, Error?) -> Void) {
+        var request = URLRequest(url: url)
+        if (header != nil) {
+            request.addValue(header!, forHTTPHeaderField:"Authorization")
+        }
+        if (boundary != nil) {
+            request.httpMethod = "POST";
+            request.httpBody = postData;
+            let contentType = "multipart/form-data; boundary=\(boundary!)"
+            request.setValue(contentType, forHTTPHeaderField:"Content-Type")
+        } else if (postData != nil) {
+            request.httpMethod = "PUT";
+            request.httpBody = postData;
+            request.setValue("application/json", forHTTPHeaderField:"Content-Type")
+        } else {
+            request.httpMethod = "GET";
+        }
+        
+        let task = URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in
+            if (error != nil) {
+                OperationQueue.main.addOperation {
+                    callback(nil, error)
+                }
+            } else {
+                let statusCode = (response as? HTTPURLResponse)?.statusCode ?? 457
+                if (response == nil || statusCode != 200) {
+                    let url = request.url
+                    let err = NSError(domain: "JuickErrorDomain", code: statusCode, userInfo: ["url":url!.absoluteString])
+                    OperationQueue.main.addOperation {
+                        callback(nil, err)
+                    }
+                } else {
+                    OperationQueue.main.addOperation {
+                        callback(data, error)
+                    }
+                }
+            }
+        })
+        self.backgroundQueue.addOperation {
+            task.resume()
+        }
+    }
+    private func multipartData(params:[String:String], boundary:String) -> Data {
+        var body = Data()
+        for (key, value) in params {
+            body.append("--\(boundary)\r\n".data(using: .utf8)!)
+            body.append("Content-Disposition: form-data; name=\(key)\r\n\r\n".data(using: .utf8)!)
+            body.append("\(value)\r\n".data(using: .utf8)!)
+        }
+        body.append("--\(boundary)--".data(using: .utf8)!)
+        return body;
+    }
+    private func get(path:String, params:[String:String], callback:@escaping (NSDictionary?, Error?) -> Void) {
+        if let url = URL(string: path, relativeTo: self.baseURL) {
+            let requestUrl = params.isEmpty ? url : self.url(url: url, params: params)
+            fetchData(url: requestUrl, postData: nil, boundary: nil, header: self.authorizationHeader) {
+                (responseData, err) in
+                if (err != nil) {
+                    callback(nil, err)
+                } else {
+                    if let data = responseData, let jsonData = try? JSONSerialization.jsonObject(with: data, options: []) {
+                        callback(jsonData as? NSDictionary, nil)
+                    } else {
+                        callback(nil, NSError(domain: "JuickErrorDomain", code: 500, userInfo: ["message":"JSON error"]))
+                    }
+                }
+            }
+        }
+    }
+    
+    func post(path: String, params:[String:String], callback:@escaping (NSDictionary?, Error?) -> Void) {
+        if let url = URL(string: path, relativeTo: self.baseURL) {
+            let boundary = "Boundary-\(UUID().uuidString)";
+            fetchData(url: url, postData:multipartData(params: params, boundary: boundary), boundary: boundary, header: self.authorizationHeader) {
+                (responseData, err) in
+                if (err != nil) {
+                    callback(nil, err)
+                } else {
+                    if let data = responseData, let jsonData = try? JSONSerialization.jsonObject(with: data, options: []) {
+                        callback(jsonData as? NSDictionary, nil)
+                    } else {
+                        callback(nil, NSError(domain: "JuickErrorDomain", code: 500, userInfo: ["message":"JSON error"]))
+                    }
+                }
+            }
+        }
+    }
+
+    func fetchImage(url:URL, callback:@escaping(Data?)-> Void) {
+        fetchData(url: url, postData: nil, boundary: nil, header: self.authorizationHeader) { (data, err) in
+            if (err != nil) {
+                callback(nil);
+            } else {
+                callback(data);
+            }
+        }
+    }
+}