Modules:
struct UserInfoResponse: Decodable {
var id : String
var username : String
var accountType: String
}
struct InstagramUser: Codable{
var userId : String
var accessToken : String
var expiresIn: Int64
}
AccessTokenRepository:
class AccessTokenRepository {
static let shared = AccessTokenRepository()
private let boundary = "boundary=\(NSUUID().uuidString)"
@KeychainStorage("INSTAGRAM_USER_INFO") private var instagramUser :InstagramUser? = nil
func saveInstagramInfo(userId: String, accessToken: String, expiresIn: Int64) {
let newExpiresIn = Int64(NSDate().timeIntervalSince1970) + expiresIn
instagramUser = InstagramUser(userId: userId, accessToken: accessToken, expiresIn: newExpiresIn)
}
func isTokenValid() -> Bool {
if(instagramUser != nil){
print("\nnow: \(Int64(NSDate().timeIntervalSince1970)), expiresIn: \(instagramUser!.expiresIn)\n")
}
if(instagramUser == nil || instagramUser!.expiresIn < Int64(NSDate().timeIntervalSince1970)){
return false
}else{
return true
}
}
func getUserInfo(completionHandler: @escaping (UserInfoResponse) -> Void) throws {
guard instagramUser != nil else {
throw InstagramErrors.tokenEmpty
}
guard isTokenValid() == true else {
throw InstagramErrors.tokenExpired
}
let url = URL(string: "https://graph.instagram.com/me?fields=id,username,account_type&access_token=\(instagramUser!.accessToken)")!
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) {
data, response, error in
if let data = data {
do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let response = try decoder.decode(UserInfoResponse.self, from: data)
print("response \(response)")
completionHandler(response)
}catch(let error) {
print(error.localizedDescription)
}
} else {
print("No Data")
}
}.resume()
}
func getMedias(completionHandler: @escaping ([[String : Any]]) -> Void) throws {
guard instagramUser != nil else {
throw InstagramErrors.tokenEmpty
}
guard isTokenValid() == true else {
throw InstagramErrors.tokenExpired
}
let url = URL(string: "https://graph.instagram.com/me/media?fields=id,caption,media_type,timestamp,permalink,media_url,thumbnail_url&access_token=\(instagramUser!.accessToken)")!
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) {
data, response, error in
if let data = data {
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] {
// try to read out a dictionary
print("json = \(json)")
if let data = json["data"] as? [[String:Any]] {
print("\n\n\n\ndata = \(data)")
completionHandler(data)
}
}
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
} else {
print("No Data")
}
}.resume()
}
func getAlbumDetail(albumId: String, completionHandler: @escaping ([[String : Any]]) -> Void) throws {
guard instagramUser != nil else {
throw InstagramErrors.tokenEmpty
}
guard isTokenValid() == true else {
throw InstagramErrors.tokenExpired
}
let url = URL(string: "https://graph.instagram.com/\(albumId)/children?fields=id,media_type,media_url,timestamp,thumbnail_url&access_token=\(instagramUser!.accessToken)")!
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) {
data, response, error in
if let data = data {
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] {
// try to read out a dictionary
print("json = \(json)")
if let data = json["data"] as? [[String:Any]] {
print("\n\n\n\ndata = \(data)")
completionHandler(data)
}
}
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
} else {
print("No Data")
}
}.resume()
}
func getMediaItem(mediaId: String, completionHandler: @escaping ([String : Any]) -> Void) throws {
guard instagramUser != nil else {
throw InstagramErrors.tokenEmpty
}
guard isTokenValid() == true else {
throw InstagramErrors.tokenExpired
}
let url = URL(string: "https://graph.instagram.com/\(mediaId)?fields=id,caption,media_type,timestamp,permalink,media_url,thumbnail_url&access_token=\(instagramUser!.accessToken)")!
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) {
data, response, error in
if let data = data {
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] {
print("\n\n\n\njson = \(json)")
completionHandler(json)
}
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
} else {
print("No Data")
}
}.resume()
}
func getShortAccessTokenInfo(clientId: String, clientSecret: String, code: String, redirectUri: String, completionHandler: @escaping (ShortAccessTokenResponse) -> Void) {
let url = URL(string: "https://api.instagram.com/oauth/access_token")!
let headers = [
"content-type": "multipart/form-data; boundary=\(boundary)"
]
let parameters = [
[
"name": "client_id",
"value": clientId
],
[
"name": "client_secret",
"value": clientSecret
],
[
"name": "grant_type",
"value": "authorization_code"
],
[
"name": "redirect_uri",
"value": redirectUri
],
[
"name": "code",
"value": code
]
]
var request = URLRequest(url: url)
let postData = getFormBody(parameters, boundary)
request.allHTTPHeaderFields = headers
request.httpMethod = "POST"
request.httpBody = postData
URLSession.shared.dataTask(with: request) {
data, response, error in
if let data = data {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
do {
let response = try decoder.decode(ShortAccessTokenResponse.self, from: data)
completionHandler(response)
} catch {
print(error.localizedDescription)
}
} else {
print("No Data")
}
}.resume()
}
func getLongAccessTokenInfo(accessToken: String,clientSecret: String,grantType: String, completionHandler: @escaping (LongAccessTokenResponse) -> Void) {
let url = URL(string: "https://graph.instagram.com/access_token?access_token=\(accessToken)&client_secret=\(clientSecret)&grant_type=\(grantType)")!
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) {
data, response, error in
if let data = data {
do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let response = try decoder.decode(LongAccessTokenResponse.self, from: data)
completionHandler(response)
}catch(let error) {
print(error.localizedDescription)
}
} else {
print("No Data")
}
}.resume()
}
func logout() {
instagramUser = nil
}
private func getFormBody(_ parameters: [[String : String]], _ boundary: String) -> Data {
var body = ""
let error: NSError? = nil
for param in parameters {
let paramName = param["name"]!
body += "--\(boundary)\r\n"
body += "Content-Disposition:form-data; name=\"\(paramName)\""
if let filename = param["fileName"] {
let contentType = param["content-type"]!
var fileContent: String = ""
do { fileContent = try String(contentsOfFile: filename, encoding: String.Encoding.utf8)}
catch {
print(error)
}
if (error != nil) {
print(error!)
}
body += "; filename=\"\(filename)\"\r\n"
body += "Content-Type: \(contentType)\r\n\r\n"
body += fileContent
} else if let paramValue = param["value"] {
body += "\r\n\r\n\(paramValue)"
}
}
return body.data(using: .utf8)!
}
}
@propertyWrapper
struct KeychainStorage<Value: Codable> {
let key: String
let service: String
let initialValue: Value?
private let keychain: KeychainAccess.Keychain
private let encoder = JSONEncoder()
private let decoder = JSONDecoder()
init(wrappedValue initialValue: Value?, _ key: String, service: String? = nil) {
self.initialValue = initialValue
self.key = key
self.service = service ?? Bundle.main.bundleIdentifier ?? "com.kishikawakatsumi.KeychainAccess"
self.keychain = KeychainAccess.Keychain(service: self.service)
}
var wrappedValue: Value? {
get {
guard let data = try? keychain.getData(key),
let value = try? decoder.decode(Value.self, from: data) else {
return initialValue
}
return value
}
set {
guard newValue != nil,
let newData = try? encoder.encode(newValue) else {
try? keychain.remove("INSTAGRAM_USER_INFO")
return
}
try? keychain.set(newData, key: key)
}
}
}
enum InstagramErrors: Error {
case tokenEmpty
case tokenExpired
}
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