iOS API Reference

Flagger

initialize

public static func initialize(apiKey: String,
                              sourceURL: String = "",
                              backupSourceURL: String = "",
                              sseURL: String = "",
                              ingestionURL: String = "",
                              logLevel: LogLevel = LogLevel.error) -> Void

Use this function once at the start of the application

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
   // Override point for customization after application launch.
   Flagger.initialize(apiKey: "<API_KEY>")

   return true
}
nametypeRequiredDefaultDescription
apiKeystringtrueNoneAPI key to an environment
sourceUrlstringfalsehttps://flags.airdeploy.io/v3/config/URL to get FlaggerConfiguration
backupSourceURLstringfalsehttps://backup-api.airshiphq.com/v3/config/backup URL to get FlaggerConfiguration
sseUrlstringfalsehttps://sse.airdeploy.io/v3/sse/URL for real-time updates of FlaggerConfiguration via sse
ingestionUrlstringfalsehttps://ingestion.airdeploy.io/v3/ingest/URL for ingestion
logLevelstringfalseERRORset up log level: ERROR, WARN, DEBUG. Debug is the most verbose level and includes all Network requests
  • If second (third …) call of initialize happens:
    • If the arguments are the same, initialize method does nothing
    • If arguments differ, Flagger prints warnings and recreates(closes and creates new) resources(SSE connection, Ingester, gets new FlaggerConfiguration).

    • Note: you must call initialize only once

  • If initial FlaggerConfiguration is not fetched from source/backup, Flagger prints a warning
  • If Flagger fails to get FlaggerConfiguration then all Flags Functions return Default Variation
  • If Flagger fails to establish SSE connection, it retries every 30 seconds until succeeded
  • If you call any Flag Function BEFORE initialize is finished then you'll get Default Variation

shutdown

public static func shutdown(timeoutMillis: Int) -> Bool

shutdown ingests data(if any), stops ingester and closes SSE connection. shutdown waits until current ingestion request is finished, but no longer than a timeoutMillis.

returns true if closed by timeout

Note: you must call shutdown only once before the end of the application runtime.

Probably the best place to call shutdown is at applicationWillTerminate method:

func applicationWillTerminate(_ application: UIApplication) {
    _ = Flagger.shutdown(timeoutMillis: 1000)
}

publish

public static func publish(_ entity: Entity) -> Void

Explicitly notifies Airdeploy about an Entity

Flagger.publish(Entity("343223"))

track

public static func track(_ event: Event) -> Void

Event tracking API. Entity is an optional parameter if it was set before.

let entity = Entity(id: "57145770", type: "User", group: Group(id: "321", attributes:Attributes().put(key: "isAdmin", value: true)))
let event = Event(name: "test", attributes: Attributes().put(key: "isAdmin", value: true), entity: entity)
Flagger.track(event)

Flagger.track(Event(name: "test", attributes: Attributes().put(key: "isAdmin", value: true)))

setEntity

public static func setEntity(_ entity: Entity?) -> Void

setEntity stores an entity in Flagger, which allows omission of entity in other API methods.

let entity = Entity(id: "57145770")
Flagger.setEntity(nil) // resets any entity that flagger could have
XCTAssertFalse(Flagger.flagIsEnabled(codename: "group-messaging"))

Flagger.setEntity(entity)
XCTAssert(Flagger.flagIsEnabled(codename: "group-messaging")) // entity is provided by setEntity

//clean up
Flagger.setEntity(nil)
XCTAssertFalse(Flagger.flagIsEnabled(codename: "group-messaging"))

If you don't provide any entity to Flagger:

  • flag functions always resolve with the default variation
  • track method doesn't record an event

Rule of thumb: make sure you always provide an entity to the Flagger

flagIsEnabled

public static func flagIsEnabled(codename: String, entity: Entity) -> Bool
public static func flagIsEnabled(codename: String) -> Bool

Determines if flag is enabled for entity.

XCTAssert(Flagger.flagIsEnabled(codename: "group-messaging", entity: Entity(id: "57145770")))
XCTAssertFalse(Flagger.flagIsEnabled(codename: "group-messaging", entity: Entity(id: "57145771")))

Group example:

XCTAssert(Flagger.flagIsEnabled(codename: "group-messaging", entity: Entity(id: "randomid", group: Group(id: "4576815", type: "Company"))))

flagIsSampled

public static func flagIsSampled(codename: String, entity: Entity) -> Bool
public static func flagIsSampled(codename: String) -> Bool

Determines if entity is within the targeted subpopulations

let attributes: Attributes = Attributes().put(key:"createdAt", value:"2014-09-20T00:00:00Z")
XCTAssertTrue(Flagger.flagIsSampled(codename: "company-profiles", entity: Entity(id: "9139fdsds5", attributes: attributes)))

// group example
XCTAssertTrue(Flagger.flagIsSampled(codename: "org-chart", entity: Entity(id: "41", type: "User", group: Group(id:"543", type:"Company"))))

flagGetVariation

public static func flagGetVariation(codename: String, entity: Entity) -> String
public static func flagGetVariation(codename: String) -> String

Returns the variation assigned to the entity in a multivariate flag

XCTAssertEqual(Flagger.flagGetVariation(codename: "group-messaging", entity: Entity("57145770")), "enabled")

flagGetPayload

public static func flagGetPayload(codename: String, entity: Entity) -> [String:Any]
public static func flagGetPayload(codename: String) -> [String:Any]

Returns the payload associated with the treatment assigned to the entity

let payload = Flagger.flagGetPayload(codename: "faq-redesign", entity: Entity(id: "92784783"))
if let showButtonsPayload = payload["show-buttons"]{

    if let showButtons = showButtonsPayload as? Bool{
        XCTAssert(showButtons)
    } else {
        XCTFail("Must be Bool")
    }
} else {
    XCTFail("Must return payload")
}
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