feat(medusa): Add endpoints specific to DiscountConditions (#1355)

packages/medusa-react/mocks/data/fixtures.json

@@ -478,7 +478,14 @@
         "created_at": "2021-03-16T21:24:16.872Z",
         "updated_at": "2021-03-16T21:24:16.872Z",
         "deleted_at": null,
-        "metadata": null
+        "metadata": null,
+        "conditions": [
+          {
+            "id": "cnd_01F0YESMVJXKX8XZ6Q9Z6Q6Z6",
+            "type": "products",
+            "operator": "in"
+          }
+        ]
       },
       "is_disabled": false,
       "parent_discount_id": null,

packages/medusa-react/mocks/handlers/admin.ts

@@ -762,6 +762,43 @@ export const adminHandlers = [
     )
   }),
 
+  rest.post("/admin/discounts/:id/conditions", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        discount: {
+          ...fixtures.get("discount"),
+        },
+      })
+    )
+  }),
+
+  rest.post("/admin/discounts/:id/conditions/:conditionId", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        discount: {
+          ...fixtures.get("discount"),
+        },
+      })
+    )
+  }),
+
+  rest.delete(
+    "/admin/discounts/:id/conditions/:conditionId",
+    (req, res, ctx) => {
+      return res(
+        ctx.status(200),
+        ctx.json({
+          id: req.params.conditionId,
+          object: "discount-condition",
+          deleted: true,
+          discount: fixtures.get("discount"),
+        })
+      )
+    }
+  ),
+
   rest.get("/admin/draft-orders/", (req, res, ctx) => {
     return res(
       ctx.status(200),