Add statistics command

src/database/models.rs

@@ -287,7 +287,7 @@ impl User {
         })
     }
 
-    pub async fn count(&self, session: &Session) -> Result<usize, DatabaseError> {
+    pub async fn count(session: &Session) -> Result<usize, DatabaseError> {
         let result = session
             .query_unpaged(
                 r#"
@@ -1060,6 +1060,25 @@ impl Call {
 
         Ok(())
     }
+
+    pub async fn count(session: &Session) -> Result<usize, DatabaseError> {
+        let result = session
+            .query_unpaged(
+                r#"
+                    SELECT
+                        call_id
+                    FROM
+                        payphone.calls;
+                "#,
+                (),
+            )
+            .await
+            .map_err(DatabaseError::QueryError)?
+            .into_rows_result()
+            .map_err(|_| DatabaseError::ResultNotRows)?;
+
+        Ok(result.rows_num())
+    }
 }
 
 #[derive(Debug, Clone, SerializeValue, DeserializeValue)]
@@ -1325,6 +1344,22 @@ impl Message {
 
         Ok(())
     }
+
+    pub async fn count(session: &Session) -> Result<usize, DatabaseError> {
+        let result = session
+            .query_unpaged(
+                r#"
+                    SELECT message_id FROM payphone.messages;
+                "#,
+                (),
+            )
+            .await
+            .map_err(DatabaseError::QueryError)?
+            .into_rows_result()
+            .map_err(|_| DatabaseError::ResultNotRows)?;
+
+        Ok(result.rows_num())
+    }
 }
 
 pub struct MessageByPropagationId {