feat/#105: Mixpanel 기반 이벤트 로깅 연동 (피드/투표 생성 흐름)

.github/workflows/android-ci.yml

@@ -38,6 +38,7 @@ jobs:
           echo "google.webClientId=${{ secrets.GOOGLE_WEB_CLIENT_ID }}" >> local.properties
           echo "kakao.nativeAppKey=${{ secrets.KAKAO_NATIVE_APP_KEY }}" >> local.properties
           echo "kakao.nativeAppKeyDebug=${{ secrets.KAKAO_NATIVE_APP_KEY_DEBUG }}" >> local.properties
+          echo "mixpanel.token=${{ secrets.MIXPANEL_TOKEN }}" >> local.properties
 
       - name: Decode Keystore
         run: echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 --decode > app/keystore.jks

.github/workflows/distribute.yml

@@ -56,6 +56,7 @@ jobs:
           echo "google.webClientId=${{ secrets.GOOGLE_WEB_CLIENT_ID }}" >> local.properties
           echo "kakao.nativeAppKey=${{ secrets.KAKAO_NATIVE_APP_KEY }}" >> local.properties
           echo "kakao.nativeAppKeyDebug=${{ secrets.KAKAO_NATIVE_APP_KEY_DEBUG }}" >> local.properties
+          echo "mixpanel.token=${{ secrets.MIXPANEL_TOKEN }}" >> local.properties
 
       - name: Decode Keystore
         run: echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 --decode > app/keystore.jks

app/build.gradle.kts

@@ -101,6 +101,7 @@ android {
 
 dependencies {
     implementation(projects.domain)
+    implementation(projects.core.analytics)
     implementation(projects.core.data)
     implementation(projects.core.network)
     implementation(projects.core.datastore)

core/analytics/build.gradle.kts

@@ -0,0 +1,43 @@
+import java.util.Properties
+
+plugins {
+    id("buyornot.android.library")
+    alias(libs.plugins.hilt)
+    alias(libs.plugins.ksp)
+}
+
+val localProperties =
+    Properties().apply {
+        val localPropertiesFile = rootProject.file("local.properties")
+        if (localPropertiesFile.exists()) {
+            localPropertiesFile.inputStream().use { load(it) }
+        }
+    }
+
+android {
+    namespace = "com.sseotdabwa.buyornot.core.analytics"
+
+    buildFeatures {
+        buildConfig = true
+    }
+
+    buildTypes {
+        debug {
+            buildConfigField("String", "MIXPANEL_TOKEN", "\"\"")
+        }
+        release {
+            buildConfigField(
+                "String",
+                "MIXPANEL_TOKEN",
+                "\"${localProperties.getProperty("mixpanel.token", "")}\"",
+            )
+        }
+    }
+}
+
+dependencies {
+    implementation(libs.mixpanel.android)
+
+    implementation(libs.hilt.android)
+    ksp(libs.hilt.compiler)
+}

core/analytics/src/main/java/com/sseotdabwa/buyornot/core/analytics/Analytics.kt

@@ -0,0 +1,5 @@
+package com.sseotdabwa.buyornot.core.analytics
+
+interface Analytics {
+    fun track(event: AnalyticsEvent)
+}

core/analytics/src/main/java/com/sseotdabwa/buyornot/core/analytics/AnalyticsEvent.kt

@@ -0,0 +1,34 @@
+package com.sseotdabwa.buyornot.core.analytics
+
+sealed class AnalyticsEvent {
+    data class FeedViewed(
+        val firstVisibleItemIndex: Int,
+    ) : AnalyticsEvent()
+
+    data class FeedExited(
+        val timeSpentSeconds: Float,
+        val lastVisibleItemIndex: Int,
+    ) : AnalyticsEvent()
+
+    data class VoteSubmitted(
+        val feedId: Long,
+        val voteChoice: String,
+        val feedCategory: String,
+    ) : AnalyticsEvent()
+
+    data class VoteCreateStarted(
+        val entrySource: String,
+        val isLoggedIn: Boolean,
+    ) : AnalyticsEvent()
+
+    data class VoteCreateCompleted(
+        val itemId: Long,
+        val voteTitle: String,
+        val optionCount: Int,
+    ) : AnalyticsEvent()
+
+    data class VoteCreateAbandoned(
+        val filledFields: List<String>,
+        val lastStep: String?,
+    ) : AnalyticsEvent()
+}

core/analytics/src/main/java/com/sseotdabwa/buyornot/core/analytics/DebugAnalytics.kt

@@ -0,0 +1,9 @@
+package com.sseotdabwa.buyornot.core.analytics
+
+import android.util.Log
+
+class DebugAnalytics : Analytics {
+    override fun track(event: AnalyticsEvent) {
+        Log.d("Analytics", event.toString())
+    }
+}

core/analytics/src/main/java/com/sseotdabwa/buyornot/core/analytics/MixpanelAnalytics.kt

@@ -0,0 +1,53 @@
+package com.sseotdabwa.buyornot.core.analytics
+
+import com.mixpanel.android.mpmetrics.MixpanelAPI
+import org.json.JSONArray
+import org.json.JSONObject
+
+class MixpanelAnalytics(
+    private val mixpanel: MixpanelAPI,
+) : Analytics {
+    override fun track(event: AnalyticsEvent) {
+        val (name, props) = event.toMixpanel()
+        mixpanel.track(name, props)
+    }
+
+    private fun AnalyticsEvent.toMixpanel(): Pair<String, JSONObject> {
+        val props = JSONObject()
+        val name =
+            when (this) {
+                is AnalyticsEvent.FeedViewed -> {
+                    props.put("first_visible_item_index", firstVisibleItemIndex)
+                    "feed_viewed"
+                }
+                is AnalyticsEvent.FeedExited -> {
+                    props.put("time_spent_seconds", timeSpentSeconds)
+                    props.put("last_visible_item_index", lastVisibleItemIndex)
+                    "feed_exited"
+                }
+                is AnalyticsEvent.VoteSubmitted -> {
+                    props.put("feed_id", feedId)
+                    props.put("vote_choice", voteChoice)
+                    props.put("feed_category", feedCategory)
+                    "vote_submitted"
+                }
+                is AnalyticsEvent.VoteCreateStarted -> {
+                    props.put("entry_source", entrySource)
+                    props.put("is_logged_in", isLoggedIn)
+                    "vote_create_started"
+                }
+                is AnalyticsEvent.VoteCreateCompleted -> {
+                    props.put("item_id", itemId)
+                    props.put("vote_title", voteTitle)
+                    props.put("option_count", optionCount)
+                    "vote_create_completed"
+                }
+                is AnalyticsEvent.VoteCreateAbandoned -> {
+                    props.put("filled_fields", JSONArray(filledFields))
+                    if (lastStep != null) props.put("last_step", lastStep)
+                    "vote_create_abandoned"
+                }
+            }
+        return name to props
+    }
+}

core/analytics/src/main/java/com/sseotdabwa/buyornot/core/analytics/di/AnalyticsModule.kt

@@ -0,0 +1,35 @@
+package com.sseotdabwa.buyornot.core.analytics.di
+
+import android.content.Context
+import com.mixpanel.android.mpmetrics.MixpanelAPI
+import com.sseotdabwa.buyornot.core.analytics.Analytics
+import com.sseotdabwa.buyornot.core.analytics.BuildConfig
+import com.sseotdabwa.buyornot.core.analytics.DebugAnalytics
+import com.sseotdabwa.buyornot.core.analytics.MixpanelAnalytics
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AnalyticsModule {
+    @Provides
+    @Singleton
+    fun provideAnalytics(
+        @ApplicationContext context: Context,
+    ): Analytics =
+        if (BuildConfig.DEBUG) {
+            DebugAnalytics()
+        } else {
+            val mixpanel =
+                MixpanelAPI.getInstance(
+                    context,
+                    BuildConfig.MIXPANEL_TOKEN,
+                    true,
+                )
+            MixpanelAnalytics(mixpanel)
+        }
+}

feature/home/build.gradle.kts

@@ -7,6 +7,7 @@ android {
 }
 
 dependencies {
+    implementation(projects.core.analytics)
     implementation(projects.domain)
     implementation(projects.core.common)
     implementation(projects.core.designsystem)

feature/home/src/main/java/com/sseotdabwa/buyornot/feature/home/ui/HomeContract.kt

@@ -144,6 +144,15 @@ sealed interface HomeIntent {
     data object DismissSortSheet : HomeIntent
 
     data object DismissTooltip : HomeIntent
+
+    data class OnFeedScreenEntered(
+        val firstVisibleItemIndex: Int,
+    ) : HomeIntent
+
+    data class OnFeedScreenExited(
+        val lastVisibleItemIndex: Int,
+        val timeSpentSeconds: Float,
+    ) : HomeIntent
 }
 
 /**

feature/home/src/main/java/com/sseotdabwa/buyornot/feature/home/ui/HomeScreen.kt

@@ -34,6 +34,7 @@ import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.Text
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
@@ -363,6 +364,19 @@ private fun HomeFeedList(
     val listState = rememberLazyListState()
     val isEmptyViewVisible = filteredFeeds.isEmpty() && !uiState.isLoading && !uiState.hasError
     val isMyFeedEmpty = uiState.selectedTab == HomeTab.MY_FEED && isEmptyViewVisible
+
+    val enterTimeMs = remember { System.currentTimeMillis() }
+    DisposableEffect(Unit) {
+        onIntent(HomeIntent.OnFeedScreenEntered(firstVisibleItemIndex = listState.firstVisibleItemIndex))
+        onDispose {
+            onIntent(
+                HomeIntent.OnFeedScreenExited(
+                    lastVisibleItemIndex = listState.firstVisibleItemIndex,
+                    timeSpentSeconds = (System.currentTimeMillis() - enterTimeMs) / 1000f,
+                ),
+            )
+        }
+    }
     var headerHeightPx by remember { mutableIntStateOf(0) }
     val density = LocalDensity.current
     val isAtTop by remember {

feature/home/src/main/java/com/sseotdabwa/buyornot/feature/home/ui/HomeViewModel.kt

@@ -2,6 +2,8 @@ package com.sseotdabwa.buyornot.feature.home.ui
 
 import android.util.Log
 import androidx.lifecycle.viewModelScope
+import com.sseotdabwa.buyornot.core.analytics.Analytics
+import com.sseotdabwa.buyornot.core.analytics.AnalyticsEvent
 import com.sseotdabwa.buyornot.core.common.util.TimeUtils
 import com.sseotdabwa.buyornot.core.common.util.runCatchingCancellable
 import com.sseotdabwa.buyornot.core.designsystem.components.ImageAspectRatio
@@ -28,6 +30,7 @@ class HomeViewModel @Inject constructor(
     private val userPreferencesRepository: UserPreferencesRepository,
     private val feedRepository: FeedRepository,
     private val userRepository: UserRepository,
+    private val analytics: Analytics,
 ) : BaseViewModel<HomeUiState, HomeIntent, HomeSideEffect>(HomeUiState()) {
     private var currentUserId: Long? = null
     private var isUserIdLoaded = false
@@ -133,6 +136,19 @@ class HomeViewModel @Inject constructor(
             is HomeIntent.ShowSortSheet -> updateState { it.copy(showSortSheet = true) }
             is HomeIntent.DismissSortSheet -> updateState { it.copy(showSortSheet = false) }
             is HomeIntent.DismissTooltip -> updateState { it.copy(isTooltipDismissed = true) }
+            is HomeIntent.OnFeedScreenEntered ->
+                analytics.track(
+                    AnalyticsEvent.FeedViewed(
+                        firstVisibleItemIndex = intent.firstVisibleItemIndex,
+                    ),
+                )
+            is HomeIntent.OnFeedScreenExited ->
+                analytics.track(
+                    AnalyticsEvent.FeedExited(
+                        timeSpentSeconds = intent.timeSpentSeconds,
+                        lastVisibleItemIndex = intent.lastVisibleItemIndex,
+                    ),
+                )
         }
     }
 
@@ -288,6 +304,17 @@ class HomeViewModel @Inject constructor(
                         feeds = applyCategories(newAllFeeds, state.selectedCategories),
                     )
                 }
+                analytics.track(
+                    AnalyticsEvent.VoteSubmitted(
+                        feedId = targetFeed.id.toLong(),
+                        voteChoice = if (optionIndex == 0) "YES" else "NO",
+                        feedCategory =
+                            FeedCategory.entries
+                                .find { it.displayName == targetFeed.category }
+                                ?.name
+                                ?: targetFeed.category,
+                    ),
+                )
             }.onFailure { e ->
                 Log.e("HomeViewModel", "Failed to vote feed: $feedId", e)
                 // 3. 롤백 (Rollback): 해당 피드만 원복, 나머지 동시 변경사항 보존

feature/upload/build.gradle.kts

@@ -7,6 +7,7 @@ android {
 }
 
 dependencies {
+    implementation(projects.core.analytics)
     implementation(projects.core.common)
     implementation(projects.domain)
     implementation(projects.core.designsystem)

feature/upload/src/main/java/com/sseotdabwa/buyornot/feature/upload/ui/UploadContract.kt

@@ -18,6 +18,7 @@ data class UploadUiState(
     val showExitDialog: Boolean = false,
     val showPhotoPickerSheet: Boolean = false,
     val categories: List<FeedCategory> = FeedCategory.entries,
+    val lastTouchedField: String? = null,
 ) {
     val hasInput: Boolean
         get() =
@@ -27,6 +28,17 @@ data class UploadUiState(
                 link.isNotEmpty() ||
                 title.isNotEmpty() ||
                 content.isNotEmpty()
+
+    val filledFields: List<String>
+        get() =
+            buildList {
+                if (selectedImageUris.isNotEmpty()) add("images")
+                if (category != null) add("category")
+                if (price.isNotEmpty()) add("price")
+                if (link.isNotEmpty()) add("link")
+                if (title.isNotEmpty()) add("title")
+                if (content.isNotEmpty()) add("content")
+            }
 }
 
 sealed interface UploadIntent {