add todos

todos.md

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+# TODOs
+
+## Buying process
+
+### Required
+
+- [ ] E-Mail notification
+- [ ] Security mechanism has to be triggered, if present
+- [ ] Buy products in stock
+
+### Optional
+
+- [ ] Notifications via XMPP
+- [ ] Buy products in stock without an account (as a guest)
+
+## User management and authentification
+
+### Required
+
+- [ ] Deactivation of idle users with reactivation procedure
+- [ ] Mangement of security mechanism(s)
+- [ ] Manage user name
+
+### Optional
+
+- [ ] Manage further metadata
+        (E-mail, avatar, (XMPP?))
+- [ ] Close and delete account
+
+## Product management
+
+### Required
+
+- [ ] Show product amount in stock
+- [ ] Correct product amount in stock
+- [ ] Book product amount changes
+- [ ] Manage product metadata
+        (name, unit, bundle, price, category, EAN, supplier)
+- [ ] JSON-Export like in matemat
+
+### Optional
+
+## Transactions
+
+### Required
+
+- [ ] Transaction Overview/Journal
+- [ ] (Re)Charge of credit
+- [ ] Transfer fo credit to another user
+
+### Optional
+
+- [ ] (Re)Charge of credit with crypto currencies
+
+## Management of Suppliers
+
+### Required
+
+- [ ] Create order suggestion based on current product amounts in stock
+- [ ] Manage contact information of supplier
+
+### Optional
+
+- [ ] Create order based on suggestion and further product metadata to be sent
+- [ ] Post order to supplier (automatically?)
+
+## Management of authorization roles
+
+### Required
+
+- [ ] Enable granular defininition of roles
+- [ ] Grant and deny users certain roles
+
+### Optional