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RxSwiftで作るAPIラッパーのパターン
Yusuke Murata
August 19, 2016
Programming
1
1.3k
RxSwiftで作るAPIラッパーのパターン
第2回RxSwift勉強会 @ Sansan
http://connpass.com/event/35014/
Yusuke Murata
August 19, 2016
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Transcript
3Y4XJGUͰ࡞Δ"1*ϥούʔͷύλʔϯ ݄ଜా༎հ
ࣗݾհ #&45*OD$50ଜా༎հ !NVSBUBZVTVLF IUUQNVSBUBZVTVLFDPN ɹژେֶܦࡁֶ෦ଔۀ ʙָఱͷਓࣄʢ৽ଔ࠾༻ʣ ʙָఱͷΤϯδχΞ ʙ#&45גࣜձࣾ$50 ˞3Y4XJGUྺϲ݄
ɹ 3YܥϥΠϒϥϦॳ ུྺ
࡞͍ͬͯΔαʔϏεʢձࣾʣ IUUQTUSBWFMFSTBJ
࡞͍ͬͯΔαʔϏεʢݸਓʣ IUUQTCJUMZNVMUJUFBN
5SBWFMFSTͷߏʢ8&#ʣ ϒϥβ 3BJMT "1* ɾඳը3FBDU ɾ"KBYͰ3BJMTͷ"1*Λୟ͘ ɾ1SPNJTFͰෳͷ"1*ίʔϧΛνΣʔϯ͢Δ
5SBWFMFSTͷߏʢΞϓϦʣ ΞϓϦ 3BJMT "1* ɾඳը4UPSZCPBSE ίʔυ ɾ"MBNPGJSFͰ3BJMTͷ"1*Λୟ͘ ɾ3Y4XJGU 3Y"MBNPGJSF
Ͱෳͷ"1*ίʔϧΛ νΣʔϯ͢Δ
"1*ͷύλʔϯ ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠
"1*ͷύλʔϯ ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠
ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ྫɿϩάΠϯ"1* ɾϩάΠϯ͕ඞཁͳॲཧͷલʹϩάΠϯը໘Λදࣔ ɾϝʔϧΞυϨεͱύεϫʔυΛ1045͢Δ ɾޭͨ͠ΒϩάΠϯը໘Λดͯ͡ଓ͖ͷॲཧΛ͢Δ ɾࣦഊͨ͠ΒݻఆͷจݴΛදࣔ ɹʢϝʔϧΞυϨεͱύεϫʔυΛ֬͝ೝ͍ͩ͘͞తͳʣ
ޭPSࣦഊ͚ͩΘ͔Ε͍͍ func signIn(email: String, password: String) -> Driver<Bool> {
let params = ["user[email]": email, "user[password]": password] return rx_responseJSON(.POST, endPoint: .SignIn, parameters: params) .map { success, _ in success } .asDriver(onErrorJustReturn: false) } ྫɿϩάΠϯ"1*
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ private func rx_responseJSON(method: Alamofire.Method, url: String, parameters: [String:
AnyObject]? = nil, encoding: ParameterEncoding = .URL, headers: [String: String]? = nil) -> Observable<(Bool, AnyObject?)> { return manager .rx_responseJSON(method, url, parameters: parameters, ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹencoding: encoding, headers: headers) .map { response, json in if 200 ..< 300 ~= response.statusCode { return (true, json) } else { return (false, json) } } } SY@SFTQPOTF+40/ͷத
ޭPSࣦഊ͚ͩΘ͔Ε͍͍ func signIn(email: String, password: String) -> Driver<Bool> {
let params = ["user[email]": email, "user[password]": password] return rx_responseJSON(.POST, endPoint: .SignIn, parameters: params) .map { success, _ in success } .asDriver(onErrorJustReturn: false) } ྫɿϩάΠϯ"1* ɾجຊ%SJWFSΛฦ͢ ɹˠඇಉظͷ6*ૢ࡞ʹ͍ͬͯ͜ ɹɹ$BO`UFSSPSPVU ɹɹ0CTFSWFPONBJOTDIFEVMFS ɹɹ4IBSJOHTJEFFGGFDUT ɹɹIUUQTHJUIVCDPN3FBDUJWF93Y4XJGUCMPCNBTUFS%PDVNFOUBUJPO6OJUTNEESJWFSVOJU
ޭPSࣦഊ͚ͩΘ͔Ε͍͍ func signIn(email: String, password: String) -> Driver<Bool> {
let params = ["user[email]": email, "user[password]": password] return rx_responseJSON(.POST, endPoint: .SignIn, parameters: params) .map { success, _ in success } .asDriver(onErrorJustReturn: false) } ྫɿϩάΠϯ"1* ɾܕ#PPMʹ͢Δ ɹˠޭ͔ࣦഊ͔ͷ ɹˠ0QUJPOBMͰ͋Δඞཁͳ͍
ޭPSࣦഊ͚ͩΘ͔Ε͍͍ func signIn(email: String, password: String) -> Driver<Bool> {
let params = ["user[email]": email, "user[password]": password] return rx_responseJSON(.POST, endPoint: .SignIn, parameters: params) .map { success, _ in success } .asDriver(onErrorJustReturn: false) } ྫɿϩάΠϯ"1* ɾͳͷͰࣦഊͨ͠ΒGBMTFฦ͠ͱ͚͍͍
ޭPSࣦഊ͚ͩΘ͔Ε͍͍ let input = Driver.combineLatest(email, password) { ($0, $1)
} loginButton.rx_tap.asDriver() .withLatestFrom(input) .flatMapLatest { mail, password in api.signIn(mail, password: password) } .driveNext { [unowned self] success in if success { self.dismissViewControllerAnimated(true, completion: nil) } else { // show error message } } .addDisposableTo(disposeBag) ྫɿϩάΠϯ"1* ɾ͏ଆʢ6*7JFXªPOUSPMMFSʣ͜Μͳײ͡
"1*ͷύλʔϯ ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ྫɿϢʔβʔใ ɾઃఆը໘ͰϩάΠϯதͷϢʔβʔͷใΛද͍ࣔͨ͠ ɾ"1*͕ޭͨ͠ΒϨεϙϯε༰Λදࣔ ɾࣦഊͨ͠ΒϩάΠϯϘλϯΛදࣔʢະϩάΠϯѻ͍ʣ
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ func fetchUserInfo() -> Driver<User?> { return rx_responseJSON(.GET, endPoint:
.Users) .map { success, json in if success { guard let json = json as? [String: AnyObject] else { throw apiError("User parse error") } return try User(json: json) } else { return nil } } .asDriver(onErrorJustReturn: nil) } ྫɿϢʔβʔใ
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ func fetchUserInfo() -> Driver<User?> { return rx_responseJSON(.GET, endPoint:
.Users) .map { success, json in if success { guard let json = json as? [String: AnyObject] else { throw apiError("User parse error") } return try User(json: json) } else { return nil } } .asDriver(onErrorJustReturn: nil) } ྫɿϢʔβʔใ ɾཉ͍͠σʔλͷܕΛࢦఆ
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ func fetchUserInfo() -> Driver<User?> { return rx_responseJSON(.GET, endPoint:
.Users) .map { success, json in if success { guard let json = json as? [String: AnyObject] else { throw apiError("User parse error") } return try User(json: json) } else { return nil } } .asDriver(onErrorJustReturn: nil) } ྫɿϢʔβʔใ ɾޭ࣌ཉ͍͠ܕͷσʔλΛฦ͢
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ func fetchUserInfo() -> Driver<User?> { return rx_responseJSON(.GET, endPoint:
.Users) .map { success, json in if success { guard let json = json as? [String: AnyObject] else { throw apiError("User parse error") } return try User(json: json) } else { return nil } } .asDriver(onErrorJustReturn: nil) } ྫɿϢʔβʔใ ɾ0QUJPOBMʹͯ͠ɺࣦഊͳΒOJMΛฦ͢
ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ api.fetchUserInfo() .driveNext { [unowned self] (user: User?) in
self.user = user } .addDisposableTo(disposeBag) ྫɿϢʔβʔใ ɾ͏ଆʢ6*7JFXªPOUSPMMFSʣ͜Μͳײ͡
"1*ͷύλʔϯ ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠
ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ྫɿϢʔβʔొ ɾϩάΠϯը໘ͱಉ͡γνϡΤʔγϣϯ ɾϩάΠϯ͢Δ͔৽نొ͢Δ͔ΛλϒͰΓସ͑Δ ɾޭͨ͠ΒϩάΠϯը໘Λดͯ͡ଓ͖ͷॲཧ ɾࣦഊͨ͠ΒԿ͕͔͋Μ͔ͷΤϥʔ༰Λදࣔ
ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ func signUp(email: String, password: String, passwordConfirm: String, firstName:
String, lastName: String) -> Driver<(Bool, [String])> { let params = [ "user[email]": email, "user[password]": password, "user[password_confirmation]": passwordConfirm, "user[first_name]": firstName, "user[last_name]": lastName ] return rx_responseJSON(.POST, endPoint: .Users, parameters: params) .map { success, json in return (success, parseJSON(json)) } .asDriver(onErrorJustReturn: (false, [])) } ྫɿϢʔβʔొ
ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ func signUp(email: String, password: String, passwordConfirm: String, firstName:
String, lastName: String) -> Driver<(Bool, [String])> { let params = [ "user[email]": email, "user[password]": password, "user[password_confirmation]": passwordConfirm, "user[first_name]": firstName, "user[last_name]": lastName ] return rx_responseJSON(.POST, endPoint: .Users, parameters: params) .map { success, json in return (success, parseJSON(json)) } .asDriver(onErrorJustReturn: (false, [])) } ྫɿϢʔβʔొ ɾޭͨ͠ΒUSVF͚ͩฦͬͯ͘Ε͍͍
ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ func signUp(email: String, password: String, passwordConfirm: String, firstName:
String, lastName: String) -> Driver<(Bool, [String])> { let params = [ "user[email]": email, "user[password]": password, "user[password_confirmation]": passwordConfirm, "user[first_name]": firstName, "user[last_name]": lastName ] return rx_responseJSON(.POST, endPoint: .Users, parameters: params) .map { success, json in return (success, parseJSON(json)) } .asDriver(onErrorJustReturn: (false, [])) } ྫɿϢʔβʔొ ɾࣦഊͷ༰จࣈྻͷྻͰฦ͢ ɹˠϝʔϧΞυϨεΛೖྗ͍ͯͩ͘͠͞ ɹɹύεϫʔυΛೖྗ͍ͯͩ͘͠͞FUD
ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ signupButton.rx_tap.asDriver() .withLatestFrom(input) .flatMapLatest { api.signUp($0.0, password: $0.1, passwordConfirm:
$0.2, firstName: $0.3, lastName: $0.4) } .driveNext { [unowned self] success, errors in self.signupErrorLabel.hidden = success self.signupErrorLabel.text = errors.joinWithSeparator("\n") } .addDisposableTo(disposeBag) ྫɿϢʔβʔొ ɾ͏ଆʢ6*7JFXªPOUSPMMFSʣ͜Μͳײ͡
"1*ͷύλʔϯ ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠
ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠ func hoge(fuga: String) -> Driver<(Piyo?, [String])> { let
params = ["fuga": fuga] return rx_responseJSON(.POST, endPoint: .Hoge, parameters: params) .map { success, json in if success { return (Piyo.parseJSON(json), []) } else { return (nil, parseJSON(json)) } } .asDriver(onErrorJustReturn: (nil, [])) } ྫɿʁʁʁ
ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠ func hoge(fuga: String) -> Driver<(Piyo?, [String])> { let
params = ["fuga": fuga] return rx_responseJSON(.POST, endPoint: .Hoge, parameters: params) .map { success, json in if success { return (Piyo.parseJSON(json), []) } else { return (nil, parseJSON(json)) } } .asDriver(onErrorJustReturn: (nil, [])) } ྫɿʁʁʁ ɾͱͷΈ߹Θͤ
ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠ func hoge(fuga: String) -> Driver<(Piyo?, [String])> { let
params = ["fuga": fuga] return rx_responseJSON(.POST, endPoint: .Hoge, parameters: params) .map { success, json in if success { return (Piyo.parseJSON(json), []) } else { return (nil, parseJSON(json)) } } .asDriver(onErrorJustReturn: (nil, [])) } ྫɿʁʁʁ ɾCPEZͷKTPOɺޭͯͨ͠Βཉ͔ͬͨ͠
ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠ func hoge(fuga: String) -> Driver<(Piyo?, [String])> { let
params = ["fuga": fuga] return rx_responseJSON(.POST, endPoint: .Hoge, parameters: params) .map { success, json in if success { return (Piyo.parseJSON(json), []) } else { return (nil, parseJSON(json)) } } .asDriver(onErrorJustReturn: (nil, [])) } ྫɿʁʁʁ ɾCPEZͷKTPOɺࣦഊͯͨ͠ΒΤϥʔ༰
"1*ͷύλʔϯ ޭPSࣦഊ͚ͩΘ͔Ε͍͍ ޭ͚͕ͨ࣌ͩ͠ཉ͍͠ ࣦഊ͚ͨ࣌ͩ͠Τϥʔ༰͕ཉ͍͠ ޭͨ͠Β͕ɺࣦഊͨ͠ΒΤϥʔ༰͕ཉ͍͠
ΈͲ͜Ζ ɾશ෦ʹ౷Ұͨ͠ํ͕͍͍ʁ ɹˠ౷Ұͨ͠ํ͕Θ͔Γ͍͢ʁ ɹɹ౷Ұͨ͠ΒδΣωϦΫεͰ៉ྷʹॻ͚Δ͔ʁ ɹɹͰඞཁ࠷ݶͷใ͚ͩฦͨ͠ํ͕͍͍͢ʁ
·ͱΊ ɾ͋͘·Ͱ͜ͷΞϓϦͰ༗ޮͳͭͷཧͷํ ɾ͜ͷͭͷྨͰશ͕ͯ͏·͍͘͘Θ͚Ͱͳ͍͔ ɾ͑ͦ͏ͳ࣌ͬͯΈͯͶ
ࢀߟʹͳͬͨϖʔδ ɾʲ༁ʳ͋ͳ͕ͨٻΊ͍ͯͨϦΞΫςΟϒϓϩάϥϛϯάೖ ɾຊՈͷ(FUUJOH4UBSUFE ɾຊՈͷ6OJUTϖʔδ ɾຊՈͷ3Y&YBNQMF ɾ3Yͷ)PUͱ$PMEʹ͍ͭͯ
࠷ޙʹ ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ