[pbs-devel] [PATCH proxmox-backup v3 07/42] pbs-config: add module for loading notification config

[Lukas Wagner]

Signed-off-by: Lukas Wagner <l.wagner at proxmox.com>
Tested-by: Gabriel Goller <g.goller at proxmox.com>
Reviewed-by: Gabriel Goller <g.goller at proxmox.com>
---
 Cargo.toml                      |  3 +++
 pbs-config/Cargo.toml           |  1 +
 pbs-config/src/lib.rs           |  1 +
 pbs-config/src/notifications.rs | 41 +++++++++++++++++++++++++++++++++
 4 files changed, 46 insertions(+)
 create mode 100644 pbs-config/src/notifications.rs

diff --git a/Cargo.toml b/Cargo.toml
index 4616e476..f06aeba3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -65,6 +65,7 @@ proxmox-io = "1.0.1" # tools and client use "tokio" feature
 proxmox-lang = "1.1"
 proxmox-ldap = "0.2.1"
 proxmox-metrics = "0.3"
+proxmox-notify = "0.3"
 proxmox-openid = "0.10.0"
 proxmox-rest-server = { version = "0.5.1", features = [ "templates" ] }
 # some use "cli", some use "cli" and "server", pbs-config uses nothing
@@ -211,6 +212,7 @@ proxmox-io.workspace = true
 proxmox-lang.workspace = true
 proxmox-ldap.workspace = true
 proxmox-metrics.workspace = true
+proxmox-notify = { workspace = true, features = [ "pbs-context" ] }
 proxmox-openid.workspace = true
 proxmox-rest-server = { workspace = true, features = [ "rate-limited-stream" ] }
 proxmox-router = { workspace = true, features = [ "cli", "server"] }
@@ -257,6 +259,7 @@ proxmox-rrd.workspace = true
 #proxmox-lang = { path = "../proxmox/proxmox-lang" }
 #proxmox-ldap = { path = "../proxmox/proxmox-ldap" }
 #proxmox-metrics = { path = "../proxmox/proxmox-metrics" }
+#proxmox-notify = { path = "../proxmox/proxmox-notify" }
 #proxmox-openid = { path = "../proxmox/proxmox-openid" }
 #proxmox-rest-server = { path = "../proxmox/proxmox-rest-server" }
 #proxmox-router = { path = "../proxmox/proxmox-router" }
diff --git a/pbs-config/Cargo.toml b/pbs-config/Cargo.toml
index d11cd41e..ac639a8e 100644
--- a/pbs-config/Cargo.toml
+++ b/pbs-config/Cargo.toml
@@ -17,6 +17,7 @@ regex.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 
+proxmox-notify.workspace = true
 proxmox-router = { workspace = true, default-features = false }
 proxmox-schema.workspace = true
 proxmox-section-config.workspace = true
diff --git a/pbs-config/src/lib.rs b/pbs-config/src/lib.rs
index 3cfdb2a1..20a8238d 100644
--- a/pbs-config/src/lib.rs
+++ b/pbs-config/src/lib.rs
@@ -7,6 +7,7 @@ pub mod drive;
 pub mod media_pool;
 pub mod metrics;
 pub mod network;
+pub mod notifications;
 pub mod prune;
 pub mod remote;
 pub mod sync;
diff --git a/pbs-config/src/notifications.rs b/pbs-config/src/notifications.rs
new file mode 100644
index 00000000..df327346
--- /dev/null
+++ b/pbs-config/src/notifications.rs
@@ -0,0 +1,41 @@
+use anyhow::Error;
+
+use proxmox_notify::Config;
+
+use pbs_buildcfg::configdir;
+
+use crate::{open_backup_lockfile, BackupLockGuard};
+
+/// Configuration file location for notification targets/matchers.
+pub const NOTIFICATION_CONFIG_PATH: &str = configdir!("/notifications.cfg");
+
+/// Private configuration file location for secrets - only readable by `root`.
+pub const NOTIFICATION_PRIV_CONFIG_PATH: &str = configdir!("/notifications-priv.cfg");
+
+/// Lockfile to prevent concurrent write access.
+pub const NOTIFICATION_LOCK_FILE: &str = configdir!("/.notifications.lck");
+
+/// Get exclusive lock for `notifications.cfg`
+pub fn lock_config() -> Result<BackupLockGuard, Error> {
+    open_backup_lockfile(NOTIFICATION_LOCK_FILE, None, true)
+}
+
+/// Load notification config.
+pub fn config() -> Result<Config, Error> {
+    let content =
+        proxmox_sys::fs::file_read_optional_string(NOTIFICATION_CONFIG_PATH)?.unwrap_or_default();
+
+    let priv_content = proxmox_sys::fs::file_read_optional_string(NOTIFICATION_PRIV_CONFIG_PATH)?
+        .unwrap_or_default();
+
+    Ok(Config::new(&content, &priv_content)?)
+}
+
+/// Save notification config.
+pub fn save_config(config: Config) -> Result<(), Error> {
+    let (cfg, priv_cfg) = config.write()?;
+    crate::replace_backup_config(NOTIFICATION_CONFIG_PATH, cfg.as_bytes())?;
+    crate::replace_secret_config(NOTIFICATION_PRIV_CONFIG_PATH, priv_cfg.as_bytes())?;
+
+    Ok(())
+}
-- 
2.39.2