feat: add CMAB Example and CMAB Custom Config functions and update datafile JSON structure (#611)

Author: muzahidul-opti

DemoSwiftApp/Samples/SamplesForAPI.swift

@@ -427,4 +427,97 @@ class SamplesForAPI {
 
     }
 
+    // MARK:- CMAB Example
+    
+    static func CMAB_Basic() {
+        let SDK_KEY = "Q9LjjQmUn5pDCjKMc1jFC"
+        let FLAG_KEY = "cmab-flag"
+        let client = OptimizelyClient(
+            sdkKey: SDK_KEY
+        )
+        
+        if #available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
+            Task {
+                try await client.start()
+                let user = OptimizelyUserContext(
+                    optimizely: client,
+                    userId: "USER_123",
+                    attributes: ["country": "us"]
+                )
+                let options: [OptimizelyDecideOption] = [.ignoreCmabCache, .ignoreUserProfileService]
+                let decision =  await user.decideAsync(key: FLAG_KEY, options: options)
+                print("CMAB decision: \(decision)")
+            }
+        } else {
+            guard let localDatafileUrl = Bundle.main.url(forResource: "demoTestDatafile", withExtension: "json"),
+                  let localDatafile = try? Data(contentsOf: localDatafileUrl)
+            else {
+                fatalError("Local datafile cannot be found")
+            }
+            
+            try? client.start(datafile: localDatafile)
+            
+            let user = OptimizelyUserContext(
+                optimizely: client,
+                userId: "USER_123",
+                attributes: ["country": "us"]
+            )
+            let options: [OptimizelyDecideOption] = [.ignoreCmabCache, .ignoreUserProfileService]
+            user.decideAsync(key: FLAG_KEY, options: options, completion: { decision in
+                print("CMAB decision: \(decision)")
+            })
+        }
+        
+    }
+    
+    static func CMAB_Custom_Config() {
+        let SDK_KEY = "Q9LjjQmUn5pDCjKMc1jFC"
+        let FLAG_KEY = "cmab-flag"
+        
+        var cmabConfig = CmabConfig(
+            cacheSize: 10,
+            cacheTimeoutInSecs: 120,
+            predictionEndpoint: "https://prediction.cmab.optimizely.com/predict/%@"
+        )
+        
+        // Initialize client with custom cmab config
+        let client = OptimizelyClient(
+            sdkKey: SDK_KEY,
+            cmabConfig: cmabConfig
+        )
+        
+        if #available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
+            Task {
+                try await client.start()
+                let user = OptimizelyUserContext(
+                    optimizely: client,
+                    userId: "USER_123",
+                    attributes: ["country": "us"]
+                )
+                let options: [OptimizelyDecideOption] = [.ignoreCmabCache, .ignoreUserProfileService]
+                let decision =  await user.decideAsync(key: FLAG_KEY, options: options)
+                print("CMAB decision: \(decision)")
+            }
+        } else {
+            guard let localDatafileUrl = Bundle.main.url(forResource: "demoTestDatafile", withExtension: "json"),
+                  let localDatafile = try? Data(contentsOf: localDatafileUrl)
+            else {
+                fatalError("Local datafile cannot be found")
+            }
+            
+            try? client.start(datafile: localDatafile)
+            
+            let user = OptimizelyUserContext(
+                optimizely: client,
+                userId: "USER_123",
+                attributes: ["country": "us"]
+            )
+            let options: [OptimizelyDecideOption] = [.ignoreCmabCache, .ignoreUserProfileService]
+            user.decideAsync(key: FLAG_KEY, options: options, completion: { decision in
+                print("CMAB decision: \(decision)")
+            })
+        }
+        
+    }
+    
 }

DemoSwiftApp/SharedResources/Resources/demoTestDatafile.json

@@ -150,13 +150,55 @@
 
             },
             "id": "12331371850"
+        },
+        {
+            "id": "9300002796873",
+            "key": "cmab-rule-1",
+            "status": "Running",
+            "layerId": "9300002051159",
+            "variations": [
+                {
+                    "id": "1532445",
+                    "key": "on",
+                    "featureEnabled": true,
+                    "variables": []
+                },
+                {
+                    "id": "1532444",
+                    "key": "off",
+                    "featureEnabled": false,
+                    "variables": []
+                }
+            ],
+            "trafficAllocation": [],
+            "forcedVariations": {
+                
+            },
+            "audienceIds": [
+                "5716609898119168"
+            ],
+            "audienceConditions": [
+                "or",
+                "5716609898119168"
+            ],
+            "cmab": {
+                "attributeIds": [
+                    "6381652968996864"
+                ],
+                "trafficAllocation": 10000
+            }
         }
     ],
     "audiences": [
         {
             "id": "12208130097",
             "conditions": "[\"and\", [\"or\", [\"or\", {\"name\": \"browser_type\", \"type\": \"custom_attribute\", \"value\": \"safari\"}, {\"name\": \"browser_type\", \"type\": \"custom_attribute\", \"value\": \"chrome\"}]]]",
             "name": "safari"
+        },
+        {
+            "id": "5716609898119168",
+            "conditions": "[\"and\", [\"or\", [\"or\", {\"match\": \"exact\", \"name\": \"country\", \"type\": \"custom_attribute\", \"value\": \"us\"}], [\"or\", {\"match\": \"exact\", \"name\": \"country\", \"type\": \"custom_attribute\", \"value\": \"ru\"}]]]",
+            "name": "cmab-audience"
         }
     ],
     "groups": [
@@ -174,6 +216,10 @@
         {
             "id": "12126623630",
             "key": "geo"
+        },
+        {
+            "id": "6381652968996864",
+            "key": "country"
         }
     ],
     "botFiltering": false,