Continuous sync (#320)

* Continuous sync * Mobile dep upgrade
2023-01-20 16:08:01 +01:00
parent 3fb393baf3
commit 2577a2db32
17 changed files with 416 additions and 224 deletions
@@ -0,0 +1,78 @@
+import { Hook, Manifest } from "../types.ts";
+import { Cron } from "https://cdn.jsdelivr.net/gh/hexagon/croner@4/src/croner.js";
+import { safeRun } from "../util.ts";
+import { System } from "../system.ts";
+
+export type CronHookT = {
+  cron?: string | string[];
+};
+
+export class CronHook implements Hook<CronHookT> {
+  apply(system: System<CronHookT>): void {
+    let tasks: Cron[] = [];
+    system.on({
+      plugLoaded: () => {
+        reloadCrons();
+      },
+      plugUnloaded() {
+        reloadCrons();
+      },
+    });
+
+    reloadCrons();
+
+    function reloadCrons() {
+      tasks.forEach((task) => task.stop());
+      tasks = [];
+      for (const plug of system.loadedPlugs.values()) {
+        if (!plug.manifest) {
+          continue;
+        }
+        for (
+          const [name, functionDef] of Object.entries(
+            plug.manifest.functions,
+          )
+        ) {
+          if (!functionDef.cron) {
+            continue;
+          }
+          const crons = Array.isArray(functionDef.cron)
+            ? functionDef.cron
+            : [functionDef.cron];
+          for (const cronDef of crons) {
+            tasks.push(
+              new Cron(cronDef, () => {
+                // console.log("Now acting on cron", cronDef);
+                safeRun(async () => {
+                  try {
+                    await plug.invoke(name, [cronDef]);
+                  } catch (e: any) {
+                    console.error("Execution of cron function failed", e);
+                  }
+                });
+              }),
+            );
+          }
+        }
+      }
+    }
+  }
+
+  validateManifest(manifest: Manifest<CronHookT>): string[] {
+    const errors: string[] = [];
+    for (const functionDef of Object.values(manifest.functions)) {
+      if (!functionDef.cron) {
+        continue;
+      }
+      const crons = Array.isArray(functionDef.cron)
+        ? functionDef.cron
+        : [functionDef.cron];
+      for (const _cronDef of crons) {
+        // if (!cron.validate(cronDef)) {
+        //   errors.push(`Invalid cron expression ${cronDef}`);
+        // }
+      }
+    }
+    return errors;
+  }
+}