add membership state machine

Author: caillou

guides/membership-state-machine.ts

@@ -0,0 +1,71 @@
+type StateName =
+  | 'lead'
+  | 'prospect'
+  | 'trial active'
+  | 'trial active, yearly dromant'
+  | 'yearly active'
+  | 'yearly grace period'
+  | 'yearly active, yearly dormant'
+  | 'monthly active'
+  | 'monthly grace period'
+// | 'monthly gift active'
+
+type Trigger =
+  | 'activate free trial'
+  | 'buy yearly'
+  | 'buy monthly'
+  | 'buy prolongation'
+  | 'redeem monthly gift'
+  | 'prolongation auto-payed'
+  | 'active period ends'
+  | 'grace period ends'
+
+type State = {
+  [key in Trigger]?: StateName
+}
+
+type States = {
+  [key in StateName]: State
+}
+
+const states: States = {
+  lead: {
+    'buy yearly': 'yearly active',
+    'buy monthly': 'monthly active',
+    'activate free trial': 'trial active'
+  },
+  prospect: {
+    'buy yearly': 'yearly active',
+    'buy monthly': 'monthly active'
+  },
+  'trial active': {
+    'buy yearly': 'trial active, yearly dromant',
+    'active period ends': 'prospect'
+  },
+  'trial active, yearly dromant': {
+    'active period ends': 'yearly active'
+  },
+  'yearly active': {
+    'active period ends': 'yearly grace period',
+    'buy prolongation': 'yearly active',
+    'buy yearly': 'yearly active, yearly dormant'
+    // 'redeem monthly gift'
+  },
+  'yearly active, yearly dormant': {
+    'active period ends': 'yearly active'
+  },
+  'yearly grace period': {
+    'buy prolongation': 'yearly active',
+    'prolongation auto-payed': 'yearly active',
+    'buy yearly': 'yearly active, yearly dormant',
+    'grace period ends': 'prospect'
+  },
+  'monthly active': {
+    'active period ends': 'monthly grace period',
+    'prolongation auto-payed': 'monthly active'
+  },
+  'monthly grace period': {
+    'prolongation auto-payed': 'monthly active',
+    'grace period ends': 'prospect'
+  }
+}