feat: 댓글방 댓글 조회 api 연결 (#116)

* feat: dto 및 mapper 구현

* feat: 댓글방 목록 service 구현

* feat: 댓글방 목록 data source 구현

* feat: 댓글방 목록 repository 및 model 구현

* feat: 댓글방 목록 view type을 활용한 recyclerview 구현 및 데이터 바인딩

* feat: polling 기능 구현

* feat: 댓글 스크롤 구현 (새로운 댓글이 생길시 스크롤 아래로)

* feat: 총대와 다른 참가자 이미지 리소스 파일

android/app/src/main/java/com/zzang/chongdae/data/mapper/CommentCreatedAtMapper.kt

@@ -0,0 +1,11 @@
+package com.zzang.chongdae.data.mapper
+
+import com.zzang.chongdae.data.remote.dto.response.CommentCreatedAtResponse
+import com.zzang.chongdae.domain.model.CommentCreatedAt
+
+fun CommentCreatedAtResponse.toDomain(): CommentCreatedAt {
+    return CommentCreatedAt(
+        date = this.date.toLocalDate(),
+        time = this.time.toLocalTime(),
+    )
+}

android/app/src/main/java/com/zzang/chongdae/data/mapper/CommentsMapper.kt

@@ -0,0 +1,14 @@
+package com.zzang.chongdae.data.mapper
+
+import com.zzang.chongdae.data.remote.dto.response.CommentResponse
+import com.zzang.chongdae.domain.model.Comment
+
+fun CommentResponse.toDomain(): Comment {
+    return Comment(
+        content = this.content,
+        commentCreatedAt = this.commentCreatedAtResponse.toDomain(),
+        isMine = this.isMine,
+        isProposer = this.isProposer,
+        nickname = this.nickname,
+    )
+}

android/app/src/main/java/com/zzang/chongdae/data/mapper/LocalDateTimeMapper.kt

@@ -1,6 +1,12 @@
 package com.zzang.chongdae.data.mapper
 
+import java.time.LocalDate
 import java.time.LocalDateTime
+import java.time.LocalTime
 import java.time.format.DateTimeFormatter
 
 fun String.toLocalDateTime(): LocalDateTime = LocalDateTime.parse(this, DateTimeFormatter.ISO_LOCAL_DATE_TIME)
+
+fun String.toLocalDate(): LocalDate = LocalDate.parse(this, DateTimeFormatter.ISO_LOCAL_DATE)
+
+fun String.toLocalTime(): LocalTime = LocalTime.parse(this, DateTimeFormatter.ISO_LOCAL_TIME)

android/app/src/main/java/com/zzang/chongdae/data/remote/api/CommentDetailApiService.kt

@@ -1,12 +1,14 @@
 package com.zzang.chongdae.data.remote.api
 
 import com.zzang.chongdae.data.remote.dto.request.CommentRequest
+import com.zzang.chongdae.data.remote.dto.response.CommentsResponse
 import com.zzang.chongdae.data.remote.dto.response.MeetingsResponse
 import retrofit2.Response
 import retrofit2.http.Body
 import retrofit2.http.GET
 import retrofit2.http.POST
 import retrofit2.http.Path
+import retrofit2.http.Query
 
 interface CommentDetailApiService {
     @GET("/offerings/{offering-id}/meetings")
@@ -18,4 +20,10 @@ interface CommentDetailApiService {
     suspend fun postComment(
         @Body commentRequest: CommentRequest,
     ): Response<Unit>
+
+    @GET("/comments/{offering-id}")
+    suspend fun getComments(
+        @Path("offering-id") offeringId: Long,
+        @Query("member-id") memberId: Long,
+    ): Response<CommentsResponse>
 }

android/app/src/main/java/com/zzang/chongdae/data/remote/dto/response/CommentCreatedAtResponse.kt

@@ -0,0 +1,12 @@
+package com.zzang.chongdae.data.remote.dto.response
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class CommentCreatedAtResponse(
+    @SerialName("date")
+    val date: String,
+    @SerialName("time")
+    val time: String,
+)

android/app/src/main/java/com/zzang/chongdae/data/remote/dto/response/CommentResponse.kt

@@ -0,0 +1,18 @@
+package com.zzang.chongdae.data.remote.dto.response
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable()
+data class CommentResponse(
+    @SerialName("content")
+    val content: String,
+    @SerialName("createdAt")
+    val commentCreatedAtResponse: CommentCreatedAtResponse,
+    @SerialName("isMine")
+    val isMine: Boolean,
+    @SerialName("isProposer")
+    val isProposer: Boolean,
+    @SerialName("nickname")
+    val nickname: String,
+)

android/app/src/main/java/com/zzang/chongdae/data/remote/dto/response/CommentsResponse.kt

@@ -0,0 +1,10 @@
+package com.zzang.chongdae.data.remote.dto.response
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class CommentsResponse(
+    @SerialName("comments")
+    val commentsResponse: List<CommentResponse>,
+)

android/app/src/main/java/com/zzang/chongdae/data/remote/source/CommentDetailDataSource.kt

@@ -1,10 +1,16 @@
 package com.zzang.chongdae.data.remote.source
 
 import com.zzang.chongdae.data.remote.dto.request.CommentRequest
+import com.zzang.chongdae.data.remote.dto.response.CommentsResponse
 import com.zzang.chongdae.data.remote.dto.response.MeetingsResponse
 
 interface CommentDetailDataSource {
     suspend fun getMeetings(offeringId: Long): Result<MeetingsResponse>
 
     suspend fun saveComment(commentRequest: CommentRequest): Result<Unit>
+
+    suspend fun fetchComments(
+        offeringId: Long,
+        memberId: Long,
+    ): Result<CommentsResponse>
 }

android/app/src/main/java/com/zzang/chongdae/data/remote/source/impl/CommentDetailDataSourceImpl.kt

@@ -2,6 +2,7 @@ package com.zzang.chongdae.data.remote.source.impl
 
 import com.zzang.chongdae.data.remote.api.CommentDetailApiService
 import com.zzang.chongdae.data.remote.dto.request.CommentRequest
+import com.zzang.chongdae.data.remote.dto.response.CommentsResponse
 import com.zzang.chongdae.data.remote.dto.response.MeetingsResponse
 import com.zzang.chongdae.data.remote.source.CommentDetailDataSource
 import retrofit2.Response
@@ -25,4 +26,17 @@ class CommentDetailDataSourceImpl(
             service.postComment(commentRequest = commentRequest)
                 .body() ?: throw IllegalStateException()
         }
+
+    override suspend fun fetchComments(
+        offeringId: Long,
+        memberId: Long,
+    ): Result<CommentsResponse> =
+        runCatching {
+            val response: Response<CommentsResponse> = service.getComments(offeringId, memberId)
+            if (response.isSuccessful) {
+                response.body() ?: error("에러 발생: null")
+            } else {
+                error("에러 발생: ${response.code()}")
+            }
+        }
 }

android/app/src/main/java/com/zzang/chongdae/data/repository/remote/CommentDetailRepositoryImpl.kt

@@ -3,6 +3,7 @@ package com.zzang.chongdae.data.repository.remote
 import com.zzang.chongdae.data.mapper.toDomain
 import com.zzang.chongdae.data.remote.dto.request.CommentRequest
 import com.zzang.chongdae.data.remote.source.CommentDetailDataSource
+import com.zzang.chongdae.domain.model.Comment
 import com.zzang.chongdae.domain.model.Meetings
 import com.zzang.chongdae.domain.repository.CommentDetailRepository
 
@@ -23,4 +24,16 @@ class CommentDetailRepositoryImpl(
         commentDetailDataSource.saveComment(
             commentRequest = CommentRequest(memberId, offeringId, comment),
         )
+
+    override suspend fun fetchComments(
+        offeringId: Long,
+        memberId: Long,
+    ): Result<List<Comment>> {
+        return commentDetailDataSource.fetchComments(
+            offeringId,
+            memberId,
+        ).mapCatching { response ->
+            response.commentsResponse.map { it.toDomain() }
+        }
+    }
 }

android/app/src/main/java/com/zzang/chongdae/domain/model/Comment.kt

@@ -0,0 +1,9 @@
+package com.zzang.chongdae.domain.model
+
+data class Comment(
+    val content: String,
+    val commentCreatedAt: CommentCreatedAt,
+    val isMine: Boolean,
+    val isProposer: Boolean,
+    val nickname: String,
+)

android/app/src/main/java/com/zzang/chongdae/domain/model/CommentCreatedAt.kt

@@ -0,0 +1,9 @@
+package com.zzang.chongdae.domain.model
+
+import java.time.LocalDate
+import java.time.LocalTime
+
+data class CommentCreatedAt(
+    val date: LocalDate,
+    val time: LocalTime,
+)

android/app/src/main/java/com/zzang/chongdae/domain/repository/CommentDetailRepository.kt

@@ -1,5 +1,6 @@
 package com.zzang.chongdae.domain.repository
 
+import com.zzang.chongdae.domain.model.Comment
 import com.zzang.chongdae.domain.model.Meetings
 
 interface CommentDetailRepository {
@@ -10,4 +11,9 @@ interface CommentDetailRepository {
         offeringId: Long,
         comment: String,
     ): Result<Unit>
+
+    suspend fun fetchComments(
+        offeringId: Long,
+        memberId: Long,
+    ): Result<List<Comment>>
 }

android/app/src/main/java/com/zzang/chongdae/presentation/util/BindingAdapters.kt

@@ -13,6 +13,7 @@ import com.bumptech.glide.Glide
 import com.zzang.chongdae.R
 import com.zzang.chongdae.domain.model.OfferingCondition
 import java.time.LocalDateTime
+import java.time.LocalTime
 import java.time.format.DateTimeFormatter
 import java.util.Locale
 import java.util.regex.Pattern
@@ -161,3 +162,14 @@ fun setFormattedDeadline(
         textView.text = it.format(formatter)
     }
 }
+
+@BindingAdapter("formattedCommentTime")
+fun TextView.setTime(localTime: LocalTime) {
+    this.text = localTime.format(DateTimeFormatter.ofPattern(context.getString(R.string.amPmTime), Locale.KOREAN))
+}
+
+@BindingAdapter("setImageProposer")
+fun ImageView.setImageProposer(proposer: Boolean) {
+    val imageRes = if (proposer) R.drawable.ic_proposer else R.drawable.ic_not_proposer
+    setImageResource(imageRes)
+}

android/app/src/main/java/com/zzang/chongdae/presentation/view/commentdetail/CommentDetailActivity.kt

@@ -5,42 +5,45 @@ import android.content.Intent
 import android.os.Bundle
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.doOnPreDraw
 import androidx.databinding.DataBindingUtil
+import androidx.recyclerview.widget.LinearLayoutManager
 import com.zzang.chongdae.R
 import com.zzang.chongdae.data.remote.api.NetworkManager
 import com.zzang.chongdae.data.remote.source.impl.CommentDetailDataSourceImpl
 import com.zzang.chongdae.data.repository.remote.CommentDetailRepositoryImpl
 import com.zzang.chongdae.databinding.ActivityCommentDetailBinding
+import com.zzang.chongdae.presentation.view.commentdetail.adapter.CommentAdapter
 
 class CommentDetailActivity : AppCompatActivity() {
     private var _binding: ActivityCommentDetailBinding? = null
     private val binding get() = _binding!!
+    private val commentAdapter: CommentAdapter by lazy { CommentAdapter() }
+    private val viewModel: CommentDetailViewModel by viewModels {
+        CommentDetailViewModel.getFactory(
+            offeringId,
+            offeringTitle,
+            CommentDetailRepositoryImpl(
+                CommentDetailDataSourceImpl(NetworkManager.commentDetailService()),
+            ),
+        )
+    }
 
     private val offeringId by lazy {
         intent.getLongExtra(
             EXTRA_OFFERING_ID_KEY,
             EXTRA_DEFAULT_VALUE,
         )
     }
-
     private val offeringTitle by lazy {
         intent.getStringExtra(EXTRA_OFFERING_TITLE_KEY) ?: DEFAULT_OFFERING_TITLE
     }
 
-    private val viewModel: CommentDetailViewModel by viewModels {
-        CommentDetailViewModel.getFactory(
-            offeringId,
-            offeringTitle,
-            CommentDetailRepositoryImpl(
-                CommentDetailDataSourceImpl(NetworkManager.commentDetailService()),
-            ),
-        )
-    }
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-
         initBinding()
+        initAdapter()
+        setUpCommentsObserve()
     }
 
     override fun onDestroy() {
@@ -54,6 +57,26 @@ class CommentDetailActivity : AppCompatActivity() {
         binding.lifecycleOwner = this
     }
 
+    private fun initAdapter() {
+        binding.rvComments.apply {
+            adapter = commentAdapter
+            layoutManager =
+                LinearLayoutManager(this@CommentDetailActivity).apply {
+                    stackFromEnd = true
+                }
+        }
+    }
+
+    private fun setUpCommentsObserve() {
+        viewModel.comments.observe(this) { comments ->
+            commentAdapter.submitList(comments) {
+                binding.rvComments.doOnPreDraw {
+                    binding.rvComments.scrollToPosition(comments.size - 1)
+                }
+            }
+        }
+    }
+
     companion object {
         private const val EXTRA_DEFAULT_VALUE = 1L
         private const val EXTRA_OFFERING_ID_KEY = "offering_id_key"