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Merged
merged 7 commits into from
Jan 20, 2021
Merged

Standardize support for Firebase products that integrate with Remote Config. #7094

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91a5f0b
More logging for personalization.
vic-flair Dec 3, 2020
aa69e72
Fix null check in RCNPersonalization.m.
vic-flair Dec 14, 2020
820ad6b
Merge branch 'master' into vlum.p13n-2
vic-flair Jan 12, 2021
e5b90f7
Add CHANGELOG.
vic-flair Jan 12, 2021
e929711
Check cache for choice ID and add more asserts in tests.
vic-flair Jan 15, 2021
41439fc
Rename constants.
vic-flair Jan 16, 2021
89e4aed
Editing some comments.
vic-flair Jan 20, 2021
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17 changes: 14 additions & 3 deletions FirebaseRemoteConfig/Sources/RCNPersonalization.h
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Original file line number Diff line number Diff line change
Expand Up @@ -19,16 +19,27 @@
NS_ASSUME_NONNULL_BEGIN

static NSString *const kAnalyticsOriginPersonalization = @"fp";
static NSString *const kAnalyticsPullEvent = @"_fpc";
static NSString *const kArmKey = @"_fpid";
static NSString *const kArmValue = @"_fpct";

static NSString *const kAnalyticsPullEvent = @"personalization_choice";
static NSString *const kArmKey = @"arm_key";
static NSString *const kArmValue = @"arm_value";
static NSString *const kPersonalizationId = @"personalizationId";
static NSString *const kPersonalizationIdKey = @"personalization_id";
static NSString *const kArmIndex = @"armIndex";
static NSString *const kArmIndexKey = @"arm_index";
static NSString *const kGroup = @"group";

static NSString *const kAnalyticsPullEventInternal = @"_fpc";
static NSString *const kChoiceId = @"choiceId";
static NSString *const kChoiceIdKey = @"_fpid";

@interface RCNPersonalization : NSObject

/// Analytics connector
@property(nonatomic, strong) id<FIRAnalyticsInterop> _Nullable analytics;

@property(atomic, strong) NSMutableDictionary *armsCache;

- (instancetype)init NS_UNAVAILABLE;

/// Designated initializer.
Expand Down
22 changes: 19 additions & 3 deletions FirebaseRemoteConfig/Sources/RCNPersonalization.m
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ - (instancetype)initWithAnalytics:(id<FIRAnalyticsInterop> _Nullable)analytics {
self = [super init];
if (self) {
self->_analytics = analytics;
self->_armsCache = [[NSMutableDictionary alloc] init];
}
return self;
}
Expand All @@ -37,16 +38,31 @@ - (void)logArmActive:(NSString *)key config:(NSDictionary *)config {
}

NSDictionary *metadata = ids[key];
if (!metadata || metadata[kPersonalizationId] == nil) {
NSString *personalizationId = metadata[kPersonalizationId];
if (!metadata || personalizationId == nil) {
return;
}

// This gets dispatched to a serial queue, so this is OK. But even if not, it'll just possibly log
// more.
if (self->_armsCache[key] == personalizationId) {
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@karenyz karenyz Dec 10, 2020

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does this mean we only want to log each arm once?

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@vic-flair vic-flair Dec 14, 2020

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We want to log at least once. We can do de-duping on the back-end.

return;
}
self->_armsCache[key] = personalizationId;

[self->_analytics logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEvent
parameters:@{
kArmKey : metadata[kPersonalizationId],
kArmValue : values[key].stringValue
kArmKey : key,
kArmValue : values[key].stringValue,
kPersonalizationIdKey : personalizationId,
kArmIndexKey : metadata[kArmIndex],
kGroup : metadata[kGroup]
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@erikeldridge erikeldridge Jan 16, 2021

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Thinking: the design lists five things we want to log:

  1. Developer friendly identifier of the personalization (either the rc param, or an id customers can map back to rc param), satisfied by the arm_key field
  2. The choice that was made (a string value), satisfied by the arm_value field
  3. The group the user was in (“p13n” or “baseline”), satisfied by the group field
  4. Personalization ID, satisfied by the personalization_id field
  5. Arm index, satisfied by the arm_index field

Thinking: the external event name is arbitrary, we just need to document what it is. personalization_assignment seems self-descriptive to me 👍

Minor: renaming arm_key to something like rc_parameter would be more self-descriptive given it communicates an RC parameter. Likewise, renaming the key arg passed to logArmActive to rcParameter would clarify its purpose.

}];

[self->_analytics logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEventInternal
parameters:@{kChoiceIdKey : metadata[kChoiceId]}];
}

@end
67 changes: 42 additions & 25 deletions FirebaseRemoteConfig/Tests/Unit/RCNPersonalizationTest.m
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Original file line number Diff line number Diff line change
Expand Up @@ -61,14 +61,22 @@ - (void)setUp {
initWithData:[@"value3" dataUsingEncoding:NSUTF8StringEncoding]
source:FIRRemoteConfigSourceRemote]
},
RCNFetchResponseKeyPersonalizationMetadata :
@{@"key1" : @{kPersonalizationId : @"id1"}, @"key2" : @{kPersonalizationId : @"id2"}}
RCNFetchResponseKeyPersonalizationMetadata : @{
@"key1" : @{
kPersonalizationId : @"p13n1",
kArmIndex : @0,
kChoiceId : @"id1",
kGroup : @"BASELINE"
},
@"key2" :
@{kPersonalizationId : @"p13n2", kArmIndex : @1, kChoiceId : @"id2", kGroup : @"P13N"}
}
};

_fakeLogs = [[NSMutableArray alloc] init];
_analyticsMock = OCMProtocolMock(@protocol(FIRAnalyticsInterop));
OCMStub([_analyticsMock logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEvent
name:[OCMArg isKindOfClass:[NSString class]]
parameters:[OCMArg isKindOfClass:[NSDictionary class]]])
.andDo(^(NSInvocation *invocation) {
__unsafe_unretained NSDictionary *bundle;
Expand Down Expand Up @@ -108,7 +116,7 @@ - (void)testNonPersonalizationKey {

OCMVerify(never(),
[_analyticsMock logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEvent
name:[OCMArg isKindOfClass:[NSString class]]
parameters:[OCMArg isKindOfClass:[NSDictionary class]]]);
XCTAssertEqual([_fakeLogs count], 0);
}
Expand All @@ -118,14 +126,14 @@ - (void)testSinglePersonalizationKey {

[_personalization logArmActive:@"key1" config:_configContainer];

OCMVerify(times(1),
OCMVerify(times(2),
[_analyticsMock logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEvent
name:[OCMArg isKindOfClass:[NSString class]]
parameters:[OCMArg isKindOfClass:[NSDictionary class]]]);
XCTAssertEqual([_fakeLogs count], 1);
XCTAssertEqual([_fakeLogs count], 2);

NSDictionary *params = @{kArmKey : @"id1", kArmValue : @"value1"};
XCTAssertEqualObjects(_fakeLogs[0], params);
NSDictionary *params = @{kChoiceIdKey : @"id1"};
XCTAssertEqualObjects(_fakeLogs[1], params);
}

- (void)testMultiplePersonalizationKeys {
Expand All @@ -134,35 +142,35 @@ - (void)testMultiplePersonalizationKeys {
[_personalization logArmActive:@"key1" config:_configContainer];
[_personalization logArmActive:@"key2" config:_configContainer];

OCMVerify(times(2),
OCMVerify(times(4),
[_analyticsMock logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEvent
name:[OCMArg isKindOfClass:[NSString class]]
parameters:[OCMArg isKindOfClass:[NSDictionary class]]]);
XCTAssertEqual([_fakeLogs count], 2);
XCTAssertEqual([_fakeLogs count], 4);

NSDictionary *params1 = @{kArmKey : @"id1", kArmValue : @"value1"};
XCTAssertEqualObjects(_fakeLogs[0], params1);
NSDictionary *params1 = @{kChoiceIdKey : @"id1"};
XCTAssertEqualObjects(_fakeLogs[1], params1);

NSDictionary *params2 = @{kArmKey : @"id2", kArmValue : @"value2"};
XCTAssertEqualObjects(_fakeLogs[1], params2);
NSDictionary *params2 = @{kChoiceIdKey : @"id2"};
XCTAssertEqualObjects(_fakeLogs[3], params2);
}

- (void)testRemoteConfigIntegration {
[_fakeLogs removeAllObjects];

FIRRemoteConfigFetchAndActivateCompletion fetchAndActivateCompletion =
^void(FIRRemoteConfigFetchAndActivateStatus status, NSError *error) {
OCMVerify(times(2), [self->_analyticsMock
OCMVerify(times(4), [self->_analyticsMock
logEventWithOrigin:kAnalyticsOriginPersonalization
name:kAnalyticsPullEvent
name:[OCMArg isKindOfClass:[NSString class]]
parameters:[OCMArg isKindOfClass:[NSDictionary class]]]);
XCTAssertEqual([self->_fakeLogs count], 2);
XCTAssertEqual([self->_fakeLogs count], 4);

NSDictionary *params1 = @{kArmKey : @"id1", kArmValue : @"value1"};
XCTAssertEqualObjects(self->_fakeLogs[0], params1);
NSDictionary *params1 = @{kChoiceIdKey : @"id1"};
XCTAssertEqualObjects(self->_fakeLogs[1], params1);

NSDictionary *params2 = @{kArmKey : @"id2", kArmValue : @"value2"};
XCTAssertEqualObjects(self->_fakeLogs[1], params2);
NSDictionary *params2 = @{kChoiceIdKey : @"id2"};
XCTAssertEqualObjects(self->_fakeLogs[3], params2);
};

[_configInstance fetchAndActivateWithCompletionHandler:fetchAndActivateCompletion];
Expand Down Expand Up @@ -190,8 +198,17 @@ + (id)mockResponseHandler {
NSDictionary *response = @{
RCNFetchResponseKeyState : RCNFetchResponseKeyStateUpdate,
RCNFetchResponseKeyEntries : @{@"key1" : @"value1", @"key2" : @"value2", @"key3" : @"value3"},
RCNFetchResponseKeyPersonalizationMetadata :
@{@"key1" : @{kPersonalizationId : @"id1"}, @"key2" : @{kPersonalizationId : @"id2"}}
RCNFetchResponseKeyPersonalizationMetadata : @{
@"key1" : @{
kPersonalizationId : @"p13n1",
kArmIndex : @0,
kChoiceId : @"id1",
kGroup : @"BASELINE"
},
@"key2" :
@{kPersonalizationId : @"p13n2", kArmIndex : @1, kChoiceId : @"id2", kGroup : @"P13N"}
}

};
return [OCMArg invokeBlockWithArgs:[NSJSONSerialization dataWithJSONObject:response
options:0
Expand Down