Complete enroll route

central_backend/src/devices/devices_list.rs

@@ -1,7 +1,17 @@
 use crate::app_config::AppConfig;
-use crate::devices::device::{Device, DeviceId};
+use crate::devices::device::{Device, DeviceId, DeviceInfo};
+use crate::utils::time_utils::time_secs;
+use openssl::x509::X509Req;
 use std::collections::HashMap;
 
+#[derive(thiserror::Error, Debug)]
+pub enum DevicesListError {
+    #[error("Enrollment failed: a device with the same ID was already registered!")]
+    EnrollFailedDeviceAlreadyExists,
+    #[error("Persist device config failed: the configuration of the device was not found!")]
+    PersistFailedDeviceNotFound,
+}
+
 pub struct DevicesList(HashMap<DeviceId, Device>);
 
 impl DevicesList {
@@ -33,4 +43,51 @@ impl DevicesList {
     pub fn exists(&self, id: &DeviceId) -> bool {
         self.0.contains_key(id)
     }
+
+    /// Enroll a new device
+    pub fn enroll(
+        &mut self,
+        id: &DeviceId,
+        info: &DeviceInfo,
+        csr: &X509Req,
+    ) -> anyhow::Result<()> {
+        if self.exists(id) {
+            return Err(DevicesListError::EnrollFailedDeviceAlreadyExists.into());
+        }
+
+        let device = Device {
+            id: id.clone(),
+            info: info.clone(),
+            time_create: time_secs(),
+            time_update: time_secs(),
+            name: id.0.to_string(),
+            description: "".to_string(),
+            validated: false,
+            enabled: false,
+            relays: vec![],
+        };
+
+        // First, write CSR
+        std::fs::write(AppConfig::get().device_csr_path(id), csr.to_pem()?)?;
+
+        self.0.insert(id.clone(), device);
+        self.persist_dev_config(id)?;
+
+        Ok(())
+    }
+
+    /// Persist a device configuration on the filesystem
+    fn persist_dev_config(&self, id: &DeviceId) -> anyhow::Result<()> {
+        let dev = self
+            .0
+            .get(id)
+            .ok_or_else(|| DevicesListError::PersistFailedDeviceNotFound)?;
+
+        std::fs::write(
+            AppConfig::get().device_config_path(id),
+            serde_json::to_string_pretty(dev)?,
+        )?;
+
+        Ok(())
+    }
 }