Disable background jobs on mobile

plugos/hooks/cron.ts

@@ -2,57 +2,66 @@ 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";
+import { timingSafeEqual } from "https://deno.land/std@0.152.0/crypto/timing_safe_equal";
 
 export type CronHookT = {
   cron?: string | string[];
 };
 
 export class CronHook implements Hook<CronHookT> {
+  tasks: Cron[] = [];
+  constructor(private system: System<CronHookT>) {
+  }
+
   apply(system: System<CronHookT>): void {
-    let tasks: Cron[] = [];
+    this.system = system;
     system.on({
       plugLoaded: () => {
-        reloadCrons();
+        this.reloadCrons();
       },
-      plugUnloaded() {
-        reloadCrons();
+      plugUnloaded: () => {
+        this.reloadCrons();
       },
     });
 
-    reloadCrons();
+    this.reloadCrons();
+  }
 
-    function reloadCrons() {
-      tasks.forEach((task) => task.stop());
-      tasks = [];
-      for (const plug of system.loadedPlugs.values()) {
-        if (!plug.manifest) {
+  stop() {
+    this.tasks.forEach((task) => task.stop());
+    this.tasks = [];
+  }
+
+  reloadCrons() {
+    this.stop();
+    for (const plug of this.system.loadedPlugs.values()) {
+      if (!plug.manifest) {
+        continue;
+      }
+      for (
+        const [name, functionDef] of Object.entries(
+          plug.manifest.functions,
+        )
+      ) {
+        if (!functionDef.cron) {
           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);
-                  }
-                });
-              }),
-            );
-          }
+        const crons = Array.isArray(functionDef.cron)
+          ? functionDef.cron
+          : [functionDef.cron];
+        for (const cronDef of crons) {
+          this.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);
+                }
+              });
+            }),
+          );
         }
       }
     }