api: datstore status: introduce proper structs and restore compatibility

by moving the properties of the storage status out again to the top
level object

also introduce proper structs for the types used, to get type-safety
and better documentation for the api calls

this changes the backup counts from an array of [groups,snapshots] to
an object/struct with { groups, snapshots } and include 'other' types
(though we do not have any at this moment)

this way it is better documented

this also adapts the ui code to cope with the api changes

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

src/api2/types/mod.rs

@@ -622,6 +622,71 @@ pub struct StorageStatus {
     pub avail: u64,
 }
 
+#[api()]
+#[derive(Serialize, Deserialize, Default)]
+/// Backup Type group/snapshot counts.
+pub struct TypeCounts {
+    /// The number of groups of the type.
+    pub groups: u64,
+    /// The number of snapshots of the type.
+    pub snapshots: u64,
+}
+
+#[api(
+    properties: {
+        ct: {
+            type: TypeCounts,
+            optional: true,
+        },
+        host: {
+            type: TypeCounts,
+            optional: true,
+        },
+        vm: {
+            type: TypeCounts,
+            optional: true,
+        },
+        other: {
+            type: TypeCounts,
+            optional: true,
+        },
+    },
+)]
+#[derive(Serialize, Deserialize)]
+/// Counts of groups/snapshots per BackupType.
+pub struct Counts {
+    /// The counts for CT backups
+    pub ct: Option<TypeCounts>,
+    /// The counts for Host backups
+    pub host: Option<TypeCounts>,
+    /// The counts for VM backups
+    pub vm: Option<TypeCounts>,
+    /// The counts for other backup types
+    pub other: Option<TypeCounts>,
+}
+
+#[api(
+    properties: {
+        "gc-status": { type: GarbageCollectionStatus, },
+        counts: { type: Counts, }
+    },
+)]
+#[derive(Serialize, Deserialize)]
+#[serde(rename_all="kebab-case")]
+/// Overall Datastore status and useful information.
+pub struct DataStoreStatus {
+    /// Total space (bytes).
+    pub total: u64,
+    /// Used space (bytes).
+    pub used: u64,
+    /// Available space (bytes).
+    pub avail: u64,
+    /// Status of last GC
+    pub gc_status: GarbageCollectionStatus,
+    /// Group/Snapshot counts
+    pub counts: Counts,
+}
+
 #[api(
     properties: {
         upid: { schema: UPID_SCHEMA },