Feature: Add Dynamic Task editing in add ticket and add recurring ticket, recurring tickets now have their own task table as well

agent/includes/inc_ticket_tasks_section.php

@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * ITFlow - Editable task rows
+ *
+ * Shared by the ticket add modal and the recurring ticket add/edit modals. Rows
+ * are added and removed in the browser by agent/js/ticket_tasks_modal.js and
+ * submit as parallel tasks[] / task_estimates[] arrays, read back by
+ * parseSubmittedTasks().
+ *
+ * Set $existing_tasks before including to pre-fill rows - a list of
+ * ['name' => string, 'estimate' => int]. Defaults to none.
+ *
+ * The tasks_submitted marker distinguishes "the user cleared every row" from
+ * "this form has no task section", which an empty tasks[] cannot express because
+ * a form with no inputs of that name posts nothing at all.
+ */
+
+$existing_tasks = $existing_tasks ?? [];
+
+?>
+
+<input type="hidden" name="tasks_submitted" value="1">
+
+<div class="form-group">
+    <label>Tasks</label>
+
+    <div class="form-row mb-1 text-muted small">
+        <div class="col-7">Task</div>
+        <div class="col-3">Estimate (mins)</div>
+        <div class="col-2"></div>
+    </div>
+
+    <div id="ticketTasksContainer">
+        <?php foreach ($existing_tasks as $existing_task) { ?>
+        <div class="form-row mb-2 ticket-task-row">
+            <div class="col-7">
+                <input type="text" class="form-control" name="tasks[]" placeholder="Task name" maxlength="255" value="<?= escapeHtml($existing_task['name']) ?>">
+            </div>
+            <div class="col-3">
+                <input type="number" class="form-control" name="task_estimates[]" placeholder="Mins" min="0" value="<?= intval($existing_task['estimate']) ?: '' ?>">
+            </div>
+            <div class="col-2">
+                <button type="button" class="btn btn-secondary btn-block ticket-task-remove" title="Remove task"><i class="fa fa-fw fa-trash"></i></button>
+            </div>
+        </div>
+        <?php } ?>
+    </div>
+
+    <button type="button" class="btn btn-secondary" id="ticketTaskAdd"><i class="fas fa-plus mr-2"></i>Add Task</button>
+
+    <small class="form-text text-muted">Leave the estimate blank if you don't track one. Blank task names are ignored.</small>
+</div>