feat: Implement moment follow/unfollow feature

This commit implements the follow/unfollow feature for moments in the Search, Timeline, and Explore tabs.

It includes:

- Adding a follow button to moment cards and implementing follow/unfollow logic in the respective ViewModels.
- Updating the UI to reflect the follow status changes in the moment list.
- Handling follow/unfollow API requests.

app/src/main/java/com/aiosman/riderpro/ui/composables/Moment.kt

@@ -54,6 +54,7 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.aiosman.riderpro.AppColors
+import com.aiosman.riderpro.AppState
 import com.aiosman.riderpro.LocalNavController
 import com.aiosman.riderpro.R
 import com.aiosman.riderpro.entity.MomentEntity
@@ -70,17 +71,20 @@ fun MomentCard(
     onLikeClick: () -> Unit = {},
     onFavoriteClick: () -> Unit = {},
     onAddComment: () -> Unit = {},
+    onFollowClick: () -> Unit = {},
     hideAction: Boolean = false
 ) {
     var imageIndex by remember { mutableStateOf(0) }
     val navController = LocalNavController.current
     Column(
-        modifier = Modifier.fillMaxWidth().background(AppColors.background)
+        modifier = Modifier
+            .fillMaxWidth()
+            .background(AppColors.background)
     ) {
         Box(
             modifier = Modifier.padding(start = 16.dp, end = 16.dp, top = 16.dp, bottom = 8.dp)
         ) {
-            MomentTopRowGroup(momentEntity = momentEntity)
+            MomentTopRowGroup(momentEntity = momentEntity, onFollowClick = onFollowClick)
         }
         Column(
             modifier = Modifier
@@ -163,9 +167,9 @@ fun ModificationListHeader() {
 }
 
 @Composable
-fun MomentName(name: String) {
+fun MomentName(name: String, modifier: Modifier = Modifier) {
     Text(
-        modifier = Modifier,
+        modifier = modifier,
         textAlign = TextAlign.Start,
         text = name,
         color = AppColors.text,
@@ -214,7 +218,10 @@ fun MomentPostTime(time: String) {
 }
 
 @Composable
-fun MomentTopRowGroup(momentEntity: MomentEntity) {
+fun MomentTopRowGroup(
+    momentEntity: MomentEntity,
+    onFollowClick: () -> Unit = {}
+) {
     val navController = LocalNavController.current
     val context = LocalContext.current
     Row(
@@ -239,7 +246,7 @@ fun MomentTopRowGroup(momentEntity: MomentEntity) {
         )
         Column(
             modifier = Modifier
-                .defaultMinSize()
+                .weight(1f)
                 .padding(start = 12.dp, end = 12.dp)
         ) {
             Row(
@@ -248,8 +255,13 @@ fun MomentTopRowGroup(momentEntity: MomentEntity) {
                     .height(22.dp),
                 verticalAlignment = Alignment.CenterVertically
             ) {
-                MomentName(momentEntity.nickname)
+                MomentName(
+                    modifier = Modifier.weight(1f),
+                    name = momentEntity.nickname
+                )
 //                MomentFollowBtn()
+                Spacer(modifier = Modifier.width(16.dp))
+
             }
             Row(
                 modifier = Modifier
@@ -262,6 +274,16 @@ fun MomentTopRowGroup(momentEntity: MomentEntity) {
                 MomentPostLocation(momentEntity.location)
             }
         }
+        Spacer(modifier = Modifier.width(16.dp))
+        if (AppState.UserId != momentEntity.authorId) {
+            FollowButton(
+                isFollowing = momentEntity.followStatus
+            ) {
+                onFollowClick()
+            }
+        }
+
+
     }
 }
 

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/moment/tabs/expolre/Moment.kt

@@ -72,7 +72,10 @@ fun ExploreMomentsList() {
                                     model.favoriteMoment(momentItem.id)
                                 }
                             }
-                        }
+                        },
+                        onFollowClick = {
+                            model.followAction(momentItem)
+                        },
                     )
                 }
             }

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/moment/tabs/expolre/MomentViewModel.kt

@@ -11,7 +11,9 @@ import androidx.paging.PagingData
 import androidx.paging.cachedIn
 import androidx.paging.map
 import com.aiosman.riderpro.AppState
+import com.aiosman.riderpro.data.Moment
 import com.aiosman.riderpro.data.MomentService
+import com.aiosman.riderpro.data.UserServiceImpl
 import com.aiosman.riderpro.entity.MomentEntity
 import com.aiosman.riderpro.entity.MomentPagingSource
 import com.aiosman.riderpro.entity.MomentRemoteDataSource
@@ -24,6 +26,7 @@ import kotlinx.coroutines.launch
 
 object MomentExploreViewModel : ViewModel() {
     private val momentService: MomentService = MomentServiceImpl()
+    private val userService = UserServiceImpl()
     private val _momentsFlow = MutableStateFlow<PagingData<MomentEntity>>(PagingData.empty())
     val momentsFlow = _momentsFlow.asStateFlow()
     var existsMoment = mutableStateOf(false)
@@ -147,6 +150,31 @@ object MomentExploreViewModel : ViewModel() {
         momentService.unfavoriteMoment(id)
         updateUnfavoriteCount(id)
     }
+    fun updateFollowStatus(authorId:Int,isFollow:Boolean) {
+        val currentPagingData = _momentsFlow.value
+        val updatedPagingData = currentPagingData.map { momentItem ->
+            if (momentItem.authorId == authorId) {
+                momentItem.copy(followStatus = isFollow)
+            } else {
+                momentItem
+            }
+        }
+        _momentsFlow.value = updatedPagingData
+    }
+    fun followAction(moment: MomentEntity) {
+        viewModelScope.launch {
+            try {
+                if (moment.followStatus) {
+                    userService.unFollowUser(moment.authorId.toString())
+                } else {
+                    userService.followUser(moment.authorId.toString())
+                }
+                updateFollowStatus(moment.authorId, !moment.followStatus)
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
+        }
+    }
 
     fun ResetModel() {
         _momentsFlow.value = PagingData.empty()

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/moment/tabs/timeline/Moment.kt

@@ -71,6 +71,9 @@ fun TimelineMomentsList() {
                                     model.favoriteMoment(momentItem.id)
                                 }
                             }
+                        },
+                        onFollowClick = {
+                            model.followAction(momentItem)
                         }
                     )
 //                    Box(

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/moment/tabs/timeline/MomentViewModel.kt

@@ -13,6 +13,8 @@ import androidx.paging.filter
 import androidx.paging.map
 import com.aiosman.riderpro.AppState
 import com.aiosman.riderpro.data.MomentService
+import com.aiosman.riderpro.data.UserService
+import com.aiosman.riderpro.data.UserServiceImpl
 import com.aiosman.riderpro.entity.MomentEntity
 import com.aiosman.riderpro.entity.MomentPagingSource
 import com.aiosman.riderpro.entity.MomentRemoteDataSource
@@ -26,6 +28,7 @@ import kotlinx.coroutines.launch
 object TimelineMomentViewModel : ViewModel() {
     private val momentService: MomentService = MomentServiceImpl()
     private val _momentsFlow = MutableStateFlow<PagingData<MomentEntity>>(PagingData.empty())
+    private val userService :UserService = UserServiceImpl()
     val momentsFlow = _momentsFlow.asStateFlow()
     var existsMoment = mutableStateOf(false)
     var refreshing by mutableStateOf(false)
@@ -173,6 +176,32 @@ object TimelineMomentViewModel : ViewModel() {
         _momentsFlow.value = updatedPagingData
     }
 
+    fun updateFollowStatus(authorId:Int,isFollow:Boolean) {
+        val currentPagingData = _momentsFlow.value
+        val updatedPagingData = currentPagingData.map { momentItem ->
+            if (momentItem.authorId == authorId) {
+                momentItem.copy(followStatus = isFollow)
+            } else {
+                momentItem
+            }
+        }
+        _momentsFlow.value = updatedPagingData
+    }
+    fun followAction(moment: MomentEntity) {
+        viewModelScope.launch {
+            try {
+                if (moment.followStatus) {
+                    userService.unFollowUser(moment.authorId.toString())
+                } else {
+                    userService.followUser(moment.authorId.toString())
+                }
+                updateFollowStatus(moment.authorId, !moment.followStatus)
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
+        }
+    }
+
     fun ResetModel() {
         _momentsFlow.value = PagingData.empty()
         isFirstLoad = true

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/search/SearchScreen.kt

@@ -265,7 +265,13 @@ fun MomentResultTab() {
                         .fillMaxWidth()
                         .background(Color.White)
                 ) {
-                    MomentCard(momentEntity = momentItem, hideAction = true)
+                    MomentCard(
+                        momentEntity = momentItem,
+                        hideAction = true,
+                        onFollowClick = {
+                            model.momentFollowAction(momentItem)
+                        }
+                    )
                 }
 //                Spacer(modifier = Modifier.padding(16.dp))
             }

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/search/SearchViewModel.kt

@@ -10,15 +10,14 @@ import androidx.paging.PagingConfig
 import androidx.paging.PagingData
 import androidx.paging.cachedIn
 import androidx.paging.map
+import com.aiosman.riderpro.data.MomentService
+import com.aiosman.riderpro.data.UserServiceImpl
 import com.aiosman.riderpro.entity.AccountPagingSource
 import com.aiosman.riderpro.entity.AccountProfileEntity
+import com.aiosman.riderpro.entity.MomentEntity
 import com.aiosman.riderpro.entity.MomentPagingSource
 import com.aiosman.riderpro.entity.MomentRemoteDataSource
-import com.aiosman.riderpro.data.MomentService
 import com.aiosman.riderpro.entity.MomentServiceImpl
-import com.aiosman.riderpro.data.UserServiceImpl
-import com.aiosman.riderpro.entity.MomentEntity
-import com.aiosman.riderpro.ui.index.tabs.moment.MomentViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.collectLatest
@@ -99,4 +98,30 @@ object SearchViewModel : ViewModel() {
         _usersFlow.value = PagingData.empty()
         showResult = false
     }
+
+    fun updateMomentFollowStatus(authorId:Int,isFollow:Boolean) {
+        val currentPagingData = _momentsFlow.value
+        val updatedPagingData = currentPagingData.map { momentItem ->
+            if (momentItem.authorId == authorId) {
+                momentItem.copy(followStatus = isFollow)
+            } else {
+                momentItem
+            }
+        }
+        _momentsFlow.value = updatedPagingData
+    }
+    fun momentFollowAction(moment: MomentEntity) {
+        viewModelScope.launch {
+            try {
+                if (moment.followStatus) {
+                    userService.unFollowUser(moment.authorId.toString())
+                } else {
+                    userService.followUser(moment.authorId.toString())
+                }
+                updateMomentFollowStatus(moment.authorId, !moment.followStatus)
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
+        }
+    }
 }