feat: add server side apps pagination

Signed-off-by: yang.xiao <[email protected]>

Author: muma378

assets/swagger.json

@@ -1693,7 +1693,31 @@ type ApplicationWatchEvent struct {
 type ApplicationList struct {
 	metav1.TypeMeta `json:",inline"`
 	metav1.ListMeta `json:"metadata" protobuf:"bytes,1,opt,name=metadata"`
-	Items           []Application `json:"items" protobuf:"bytes,2,rep,name=items"`
+	Items           []Application        `json:"items" protobuf:"bytes,2,rep,name=items"`
+	Stats           ApplicationListStats `json:"stats,omitempty" protobuf:"bytes,3,opt,name=stats"`
+}
+
+type ApplicationLabelStats struct {
+	Key    string   `json:"key" protobuf:"bytes,1,opt,name=key"`
+	Values []string `json:"values" protobuf:"bytes,2,opt,name=values"`
+}
+
+// ApplicationListStats holds additional information about the list of applications
+type ApplicationListStats struct {
+	Total                int64                             `json:"total" protobuf:"bytes,1,opt,name=total"`
+	TotalBySyncStatus    map[SyncStatusCode]int64          `json:"totalBySyncStatus,omitempty" protobuf:"bytes,2,opt,name=totalBySyncStatus"`
+	TotalByHealthStatus  map[health.HealthStatusCode]int64 `json:"totalByHealthStatus,omitempty" protobuf:"bytes,3,opt,name=totalByHealthStatus"`
+	AutoSyncEnabledCount int64                             `json:"autoSyncEnabledCount" protobuf:"bytes,4,opt,name=autoSyncEnabledCount"`
+	Destinations         []ApplicationDestination          `json:"destinations" protobuf:"bytes,5,opt,name=destinations"`
+	Namespaces           []string                          `json:"namespaces" protobuf:"bytes,6,opt,name=namespaces"`
+	Labels               []ApplicationLabelStats           `json:"labels,omitempty" protobuf:"bytes,7,opt,name=labels"`
+}
+
+func NewApplicationListStats() ApplicationListStats {
+	return ApplicationListStats{
+		TotalBySyncStatus:   make(map[SyncStatusCode]int64),
+		TotalByHealthStatus: make(map[health.HealthStatusCode]int64),
+	}
 }
 
 // ComponentParameter contains information about component parameter value