cron window look-ahead + crontab docs (v1.0)

Model/RecoRecoModel.php

@@ -23,6 +23,7 @@ class RecoRecoModel extends Base
     public function run($now = null)
     {
         $now = $now ?: time();
+        $horizon = $this->horizon($now);
         $spawned = 0;
 
         $task_ids = $this->db->table('task_has_metadata')
@@ -31,13 +32,31 @@ class RecoRecoModel extends Base
             ->findAllByColumn('task_id');
 
         foreach ($task_ids as $task_id) {
-            $spawned += $this->processTemplate((int) $task_id, $now);
+            $spawned += $this->processTemplate((int) $task_id, $now, $horizon);
         }
 
         return $spawned;
     }
 
-    public function processTemplate($task_id, $now)
+    /**
+     * The look-ahead horizon for this run: fire everything whose fire time is before it. Computed as
+     * "ceil now to the next 6h boundary, then +12h", which lands on the four daily runs:
+     * 05:58 -> 18:00, 11:58 -> 00:00, 17:58 -> 06:00, 23:58 -> 12:00. Gives a 12h look-ahead with a
+     * 6h overlap between runs, so a missed run is covered by its neighbour. Past-due occurrences are
+     * naturally included (their fire time is < now < horizon) -- that is the catch-up.
+     *
+     * @param  int $now
+     * @return int
+     */
+    private function horizon($now)
+    {
+        $startOfDay = mktime(0, 0, 0, (int) date('n', $now), (int) date('j', $now), (int) date('Y', $now));
+        $boundaryHour = (intdiv((int) date('G', $now), 6) + 1) * 6;
+
+        return $startOfDay + $boundaryHour * 3600 + 12 * 3600;
+    }
+
+    public function processTemplate($task_id, $now, $horizon)
     {
         $task = $this->taskFinderModel->getById($task_id);
 
@@ -86,11 +105,12 @@ class RecoRecoModel extends Base
             $this->setDue($task_id, $cursor);
         }
 
-        // Fire every occurrence whose fire time has arrived, advancing the cursor each time.
+        // Fire every occurrence whose fire time is before this run's horizon (this includes
+        // past-due ones -> catch-up), advancing the cursor each time.
         $spawned = 0;
         $fireTime = $cursor - $daysBefore * 86400;
 
-        while ($fireTime <= $now && $spawned < self::CATCHUP_CAP) {
+        while ($fireTime < $horizon && $spawned < self::CATCHUP_CAP) {
             $this->spawn($task, $targetColumn);
 
             $next = $this->calculator()->occurrenceFrom($anchor, $frequency, $lastDay, $cursor, false);

Plugin.php

@@ -36,7 +36,7 @@ class Plugin extends Base
 
     public function getPluginVersion()
     {
-        return '0.3.2';
+        return '1.0.0';
     }
 
     public function getPluginHomepage()

README.md

@@ -21,21 +21,36 @@ leaves native recurrence untouched (the two are mutually exclusive per card).
 - **Lead time:** "create the copy N days before the due date", so the card shows up early enough
   to act on; the copy is still due on the real day.
 
+## Scheduling (cron)
+
+The engine runs from the CLI command `recoreco:run`. Add it to cron **four times a day** -- at
+05:58, 11:58, 17:58 and 23:58:
+
+```
+58 5,11,17,23 * * * cd /path/to/kanboard && php cli recoreco:run >> /var/log/recoreco.log 2>&1
+```
+
+(Point the path at your install and run it as the user that owns Kanboard's data.) Each run looks
+ahead 12 hours; the runs overlap by 6 hours, so a single missed run is covered by the next one, and
+any occurrence whose time is already past is still caught up. `days before` shifts a copy earlier
+within that lead. You can also run it by hand any time: `php cli recoreco:run`.
+
 ## Status
 
-Early development. This version adds the **Recurring schedule** modal (a task sidebar action) and
-stores the settings in task metadata. The scheduling engine and the cron command arrive in the
-following versions.
+Working for **monthly by day** (with the last-day rule), driven by cron. The remaining frequencies
+(yearly, weekly, daily, monthly by weekday), the recurrence icons, and the FinanceBuddy
+installment hand-off arrive in the following versions.
 
 ## Requirements
 
 - Kanboard >= 1.2.0
+- cron (to run `recoreco:run`)
 
 ## Installation
 
 Copy this folder into your Kanboard installation as `plugins/RecoReco/`. The directory name must be
 exactly `RecoReco` (Kanboard derives the plugin namespace from the folder name). No build step and
-no database migration.
+no database migration. Then add the cron entry above.
 
 ## License
 

VERSION

@@ -1 +1 @@
-RecoReco v0.3.2
+RecoReco v1.0