feat: pgc index page

Closes #216

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/bangumi/pgc_index/pgc_index_controller.dart

@@ -0,0 +1,69 @@
+import 'package:PiliPlus/http/bangumi.dart';
+import 'package:PiliPlus/http/loading_state.dart';
+import 'package:PiliPlus/models/bangumi/pgc_index/condition.dart';
+import 'package:PiliPlus/pages/common/common_controller.dart';
+import 'package:get/get.dart' hide Condition;
+
+class PgcIndexController extends CommonController {
+  PgcIndexController(this.indexType);
+  int? indexType;
+  Rx<LoadingState> conditionState = LoadingState.loading().obs;
+
+  late final RxBool isExpand = false.obs;
+
+  RxMap<String, dynamic> indexParams = <String, dynamic>{}.obs;
+
+  @override
+  void onInit() {
+    super.onInit();
+    getPgcIndexCondition();
+  }
+
+  Future getPgcIndexCondition() async {
+    dynamic res = await BangumiHttp.pgcIndexCondition(
+      seasonType: indexType == null ? 1 : null,
+      type: 0,
+      indexType: indexType,
+    );
+    if (res is Success) {
+      Condition data = res.response;
+      if (data.order?.isNotEmpty == true) {
+        indexParams['order'] = data.order!.first.field;
+      }
+      if (data.filter?.isNotEmpty == true) {
+        for (Filter item in data.filter!) {
+          indexParams['${item.field}'] = item.values?.firstOrNull?.keyword;
+        }
+      }
+      queryData();
+    }
+    conditionState.value = res;
+  }
+
+  @override
+  Future<LoadingState> customGetData() => BangumiHttp.pgcIndexResult(
+        page: currentPage,
+        params: indexParams,
+        seasonType: indexType == null ? 1 : null,
+        type: 0,
+        indexType: indexType,
+      );
+
+  @override
+  bool customHandleResponse(Success response) {
+    if (response.response['has_next'] == null ||
+        response.response['has_next'] == 0) {
+      isEnd = true;
+    }
+    if (response.response['list'] == null ||
+        (response.response['list'] as List?)?.isEmpty == true) {
+      isEnd = true;
+    }
+    if (currentPage != 1 && loadingState.value is Success) {
+      response.response['list']
+          ?.insertAll(0, (loadingState.value as Success).response);
+    }
+    loadingState.value = LoadingState.success(response.response['list']);
+    return true;
+  }
+}