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From: Dominik Csapak <d.csapak@proxmox.com>
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Subject: [pdm-devel] [PATCH datacenter-manager v2 3/7] server: api: add
 remote-tasks statistics
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this new api call returns task status counts by remote and by type, so
that the ui can display that without having to count these on the client
side.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 lib/pdm-api-types/src/lib.rs   | 55 +++++++++++++++++++++++
 server/src/api/remote_tasks.rs | 82 +++++++++++++++++++++++++++++++++-
 2 files changed, 135 insertions(+), 2 deletions(-)

diff --git a/lib/pdm-api-types/src/lib.rs b/lib/pdm-api-types/src/lib.rs
index 3844907..47e5894 100644
--- a/lib/pdm-api-types/src/lib.rs
+++ b/lib/pdm-api-types/src/lib.rs
@@ -1,5 +1,6 @@
 //! Basic API types used by most of the PDM code.
 
+use std::collections::HashMap;
 use std::fmt;
 
 use anyhow::{bail, Error};
@@ -232,6 +233,20 @@ pub enum TaskStateType {
     Unknown,
 }
 
+impl From<&str> for TaskStateType {
+    fn from(s: &str) -> Self {
+        if s == "OK" {
+            TaskStateType::OK
+        } else if s.starts_with("WARNINGS: ") {
+            TaskStateType::Warning
+        } else if !s.is_empty() {
+            TaskStateType::Error
+        } else {
+            TaskStateType::Unknown
+        }
+    }
+}
+
 #[api(
     properties: {
         upid: { schema: UPID::API_SCHEMA },
@@ -263,6 +278,46 @@ pub struct TaskListItem {
     pub status: Option<String>,
 }
 
+#[api]
+/// Count of tasks by status
+#[derive(Clone, Serialize, Deserialize, Default, PartialEq)]
+#[serde(rename_all = "lowercase")]
+pub struct TaskCount {
+    /// The number of successful tasks
+    pub ok: u64,
+    /// The number of tasks with warnings
+    pub warning: u64,
+    /// The number of failed tasks
+    pub error: u64,
+    /// The number of tasks with an unknown status
+    pub unknown: u64,
+}
+
+#[api{
+    properties: {
+        "by-type": {
+            type: Object,
+            properties: {},
+            additional_properties: true,
+        },
+        "by-remote": {
+            type: Object,
+            properties: {},
+            additional_properties: true,
+        },
+    },
+}]
+/// Lists the task status counts by type and by remote
+#[derive(Clone, Serialize, Deserialize, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+pub struct TaskStatistics {
+    /// A map of worker-types to status counts
+    pub by_type: HashMap<String, TaskCount>,
+    /// A map of remotes to status counts
+    #[serde(default)]
+    pub by_remote: HashMap<String, TaskCount>,
+}
+
 pub const NODE_TASKS_LIST_TASKS_RETURN_TYPE: ReturnType = ReturnType {
     optional: false,
     schema: &ArraySchema::new("A list of tasks.", &TaskListItem::API_SCHEMA).schema(),
diff --git a/server/src/api/remote_tasks.rs b/server/src/api/remote_tasks.rs
index d327272..28def2a 100644
--- a/server/src/api/remote_tasks.rs
+++ b/server/src/api/remote_tasks.rs
@@ -1,6 +1,11 @@
+use std::collections::HashMap;
+
 use anyhow::Error;
 
-use pdm_api_types::{remotes::REMOTE_ID_SCHEMA, TaskFilters, TaskListItem};
+use pdm_api_types::{
+    remotes::REMOTE_ID_SCHEMA, RemoteUpid, TaskCount, TaskFilters, TaskListItem, TaskStateType,
+    TaskStatistics,
+};
 use proxmox_router::{list_subdirs_api_method, Permission, Router, SubdirMap};
 use proxmox_schema::api;
 use proxmox_sortable_macro::sortable;
@@ -12,7 +17,13 @@ pub const ROUTER: Router = Router::new()
     .subdirs(SUBDIRS);
 
 #[sortable]
-const SUBDIRS: SubdirMap = &sorted!([("list", &Router::new().get(&API_METHOD_LIST_TASKS)),]);
+const SUBDIRS: SubdirMap = &sorted!([
+    ("list", &Router::new().get(&API_METHOD_LIST_TASKS)),
+    (
+        "statistics",
+        &Router::new().get(&API_METHOD_TASK_STATISTICS)
+    ),
+]);
 
 #[api(
     // FIXME:: see list-like API calls in resource routers, we probably want more fine-grained
@@ -50,3 +61,70 @@ async fn list_tasks(
 
     Ok(tasks)
 }
+
+#[api(
+    // FIXME:: see list-like API calls in resource routers, we probably want more fine-grained
+    // checks..
+    access: {
+        permission: &Permission::Anybody,
+    },
+    input: {
+        properties: {
+            "max-age": {
+                type: Integer,
+                optional: true,
+                // TODO: sensible default max-age
+                default: 300,
+                description: "Maximum age of cached task data",
+            },
+            filters: {
+                type: TaskFilters,
+                flatten: true,
+            },
+            remote: {
+                schema: REMOTE_ID_SCHEMA,
+                optional: true,
+            },
+        },
+    },
+)]
+/// Get task statistics for the specified filters.
+async fn task_statistics(
+    max_age: i64,
+    filters: TaskFilters,
+    remote: Option<String>,
+) -> Result<TaskStatistics, Error> {
+    let tasks = task_cache::get_tasks(max_age, filters, remote).await?;
+
+    let mut by_type: HashMap<String, TaskCount> = HashMap::new();
+    let mut by_remote: HashMap<String, TaskCount> = HashMap::new();
+
+    for task in tasks {
+        let status: TaskStateType = match task.status.as_deref() {
+            Some(status) => status.into(),
+            None => continue,
+        };
+        let entry = by_type.entry(task.worker_type).or_default();
+        match status {
+            TaskStateType::OK => entry.ok += 1,
+            TaskStateType::Warning => entry.warning += 1,
+            TaskStateType::Error => entry.error += 1,
+            TaskStateType::Unknown => entry.unknown += 1,
+        }
+
+        let remote = match task.upid.parse::<RemoteUpid>() {
+            Ok(upid) => upid.remote().to_owned(),
+            Err(_) => continue,
+        };
+
+        let entry = by_remote.entry(remote).or_default();
+        match status {
+            TaskStateType::OK => entry.ok += 1,
+            TaskStateType::Warning => entry.warning += 1,
+            TaskStateType::Error => entry.error += 1,
+            TaskStateType::Unknown => entry.unknown += 1,
+        }
+    }
+
+    Ok(TaskStatistics { by_type, by_remote })
+}
-- 
2.39.5



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