99 lines
3.9 KiB
Kotlin
99 lines
3.9 KiB
Kotlin
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package com.pukka.mediaapp.viewmodel
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import android.util.Log
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import androidx.lifecycle.ViewModel
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import androidx.lifecycle.viewModelScope
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import com.pukka.mediaapp.model.LayoutSection
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import com.pukka.mediaapp.model.NavItem
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import com.pukka.mediaapp.network.MediaRepository
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import com.pukka.mediaapp.utils.FileLogger
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import kotlinx.coroutines.flow.MutableStateFlow
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import kotlinx.coroutines.flow.StateFlow
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import kotlinx.coroutines.flow.asStateFlow
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import kotlinx.coroutines.launch
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/**
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* 首页 ViewModel：负责导航栏数据与二级布局楼层数据。
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*/
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class HomeViewModel : ViewModel() {
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private val repository = MediaRepository.getInstance()
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private val _navItems = MutableStateFlow<List<NavItem>>(emptyList())
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val navItems: StateFlow<List<NavItem>> = _navItems.asStateFlow()
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private val _sections = MutableStateFlow<List<LayoutSection>>(emptyList())
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val sections: StateFlow<List<LayoutSection>> = _sections.asStateFlow()
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private val _loading = MutableStateFlow(false)
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val loading: StateFlow<Boolean> = _loading.asStateFlow()
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private val _error = MutableStateFlow<String?>(null)
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val error: StateFlow<String?> = _error.asStateFlow()
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/** 默认选中的导航项位置 */
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private val _selectedNavIndex = MutableStateFlow(0)
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val selectedNavIndex: StateFlow<Int> = _selectedNavIndex.asStateFlow()
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private var hasLoadedNav = false
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/** 加载首页导航，加载成功后默认请求 isFocus=1 的导航项对应的布局。 */
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fun loadNav() {
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if (hasLoadedNav) return
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viewModelScope.launch {
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_loading.value = true
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repository.getLayoutNav()
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.onSuccess { response ->
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val allItems = response.data
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?.flatMap { it.navList ?: emptyList() }
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?: emptyList()
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// 只保留有布局数据的标签（type=1 为内容页）
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val contentItems = allItems.filter { it.type == 1 }
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_navItems.value = contentItems
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FileLogger.log("HomeVM", "导航加载: ${contentItems.size} 个标签, 默认选中=${contentItems.indexOfFirst { it.isFocus == "1" }}")
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hasLoadedNav = true
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if (contentItems.isNotEmpty()) {
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// 优先选 isFocus=="1" 的，否则选第一个
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val defaultIndex = contentItems.indexOfFirst { it.isFocus == "1" }
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val targetIndex = if (defaultIndex >= 0) defaultIndex else 0
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_selectedNavIndex.value = targetIndex
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loadLayout(contentItems[targetIndex].navid)
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} else {
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_loading.value = false
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}
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}
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.onFailure {
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_error.value = it.message ?: "加载导航失败"
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_loading.value = false
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}
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}
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}
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/** 根据 navid 加载二级页面布局（楼层列表）。 */
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fun loadLayout(navid: String) {
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if (navid.isEmpty()) return
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viewModelScope.launch {
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_loading.value = true
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repository.getLayout(navid)
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.onSuccess { response ->
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val sections = response.data ?: emptyList()
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Log.d("HomeViewModel", "loadLayout success: ${sections.size} sections")
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FileLogger.log("HomeVM", "布局加载: navid=$navid ${sections.size} 个楼层")
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_sections.value = sections
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}
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.onFailure {
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Log.e("HomeViewModel", "loadLayout failed", it)
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_error.value = it.message ?: "加载内容失败"
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_sections.value = emptyList()
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}
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_loading.value = false
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}
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}
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/** 更新选中的导航索引 */
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fun selectNav(index: Int) {
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_selectedNavIndex.value = index
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}
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}
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