From af9967840645b4a00d396643d21284fe1cf4722a Mon Sep 17 00:00:00 2001
From: Suherdy Yacob <suherdy.yacob@mapan.co.id>
Date: Wed, 3 Jun 2026 10:02:10 +0700
Subject: [PATCH] feat: patch PosOrder to implement multi-level membership
 program selection logic

---
 static/src/app/models/pos_order.js | 91 ++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)

diff --git a/static/src/app/models/pos_order.js b/static/src/app/models/pos_order.js
index e69de29..b27ccef 100644
--- a/static/src/app/models/pos_order.js
+++ b/static/src/app/models/pos_order.js
@@ -0,0 +1,91 @@
+/** @odoo-module **/
+
+import { PosOrder } from "@point_of_sale/app/models/pos_order";
+import { patch } from "@web/core/utils/patch";
+
+/**
+ * Safely extract a numeric ID from a Many2One field value.
+ * Handles three forms Odoo may return:
+ *   - raw integer:       5
+ *   - [id, name] tuple: [5, "Gold"]
+ *   - record object:    { id: 5, name: "Gold", ... }
+ */
+function resolveManyToOneId(value) {
+    if (!value && value !== 0) {
+        return null;
+    }
+    if (Array.isArray(value)) {
+        return parseInt(value[0], 10);
+    }
+    if (typeof value === 'object') {
+        return parseInt(value.id, 10);
+    }
+    return parseInt(value, 10);
+}
+
+// Track recursion depth to prevent infinite loops when filtering multiLevelPrograms
+let _checkingMultiLevel = false;
+
+patch(PosOrder.prototype, {
+    _programIsApplicable(program) {
+        // Evaluate base program applicability first.
+        const isApplicable = super._programIsApplicable(...arguments);
+        if (!isApplicable) {
+            return false;
+        }
+
+        // Custom Logic for Multi-Level Membership.
+        // Guard against recursive calls triggered when filtering all programs below.
+        if (program.multi_level_membership && !_checkingMultiLevel) {
+            // Retrieve all loyalty programs
+            const allPrograms = this.models['loyalty.program'].getAll();
+
+            // Set guard BEFORE filtering to prevent re-entry into this block
+            _checkingMultiLevel = true;
+            let multiLevelPrograms;
+            try {
+                // Filter programs that have the multi-level flag and pass the base applicability check.
+                // With the guard set, this._programIsApplicable(p) will skip the custom block,
+                // effectively calling only the base logic for each candidate program.
+                multiLevelPrograms = allPrograms.filter(
+                    (p) => p.multi_level_membership && this._programIsApplicable(p)
+                );
+            } finally {
+                _checkingMultiLevel = false;
+            }
+
+            // If there are no applicable multi-level programs, block all of them.
+            if (multiLevelPrograms.length === 0) {
+                return false;
+            }
+
+            let bestProgram = null;
+            const partner = this.getPartner();
+
+            // If the partner is set and has a membership level, try to match it.
+            if (partner && partner.membership_level_id) {
+                const membershipId = resolveManyToOneId(partner.membership_level_id);
+                if (membershipId) {
+                    // Find the matching program among applicable multi-level programs
+                    bestProgram = multiLevelPrograms.find((p) => p.id === membershipId) || null;
+                }
+            }
+
+            // Fallback: pick the program with the smallest minimum_spend
+            if (!bestProgram) {
+                bestProgram = multiLevelPrograms.reduce((prev, curr) => {
+                    const prevSpend = prev.minimum_spend || 0;
+                    const currSpend = curr.minimum_spend || 0;
+                    return currSpend < prevSpend ? curr : prev;
+                }, multiLevelPrograms[0]);
+            }
+
+            // Only permit the chosen program to be active
+            if (program.id !== bestProgram.id) {
+                return false;
+            }
+        }
+
+        return true;
+    },
+});