refactor(lib_core): task manager structure

refs: #5

lib_sync_core/src/tasks.rs

@@ -0,0 +1,85 @@
+use chrono::Utc;
+use futures::StreamExt;
+use serde::de::DeserializeOwned;
+use serde::Serialize;
+use std::fmt::Display;
+use tabled::Tabled;
+
+mod manager;
+
+#[derive(sqlx::Type, Debug, Clone)]
+#[repr(u8)]
+pub enum TaskStatus {
+    Pending = 1,
+    InProgress = 2,
+    Completed = 3,
+    Failed = 4,
+}
+
+impl Display for TaskStatus {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            TaskStatus::Pending => {
+                write!(f, "Pending")
+            }
+            TaskStatus::InProgress => {
+                write!(f, "In Progress")
+            }
+            TaskStatus::Completed => {
+                write!(f, "Completed")
+            }
+            TaskStatus::Failed => {
+                write!(f, "Failed")
+            }
+        }
+    }
+}
+
+pub trait TaskPayloadKey {
+    fn get_key(&self) -> String;
+}
+
+pub trait TaskPayload:
+    Serialize + DeserializeOwned + Send + Unpin + 'static + Display + TaskPayloadKey
+{
+}
+impl<T: Serialize + DeserializeOwned + Send + Unpin + 'static + Display + TaskPayloadKey>
+    TaskPayload for T
+{
+}
+
+pub type TaskJob<T> = fn(&Task<T>) -> TaskStatus;
+
+#[derive(sqlx::FromRow, Tabled, Debug)]
+pub struct Task<T: TaskPayload> {
+    id: u32,
+    payload_key: String,
+    #[sqlx(json)]
+    #[tabled(skip)]
+    payload: T,
+    #[sqlx(rename = "status_id")]
+    status: TaskStatus,
+    created_at: chrono::DateTime<Utc>,
+    #[tabled(display = "display_option_date")]
+    updated_at: Option<chrono::DateTime<Utc>>,
+}
+
+impl<T: TaskPayload> Task<T> {
+    pub fn payload(&self) -> &T {
+        &self.payload
+    }
+}
+
+impl<T: TaskPayload> Task<T> {
+    pub fn get_key(&self) -> String {
+        self.payload_key.clone()
+    }
+}
+
+fn display_option_date(o: &Option<chrono::DateTime<Utc>>) -> String {
+    match o {
+        Some(s) => format!("{}", s),
+        None => String::from(""),
+    }
+}
+