feat: new homepage statistic API's (#167)

* add date format and orDefault helpers

* introduce new statistics calculations queries

* rework statistics endpoints

* code generation

* fix styles on photo card

* label and location aggregation endpoints

* code-gen

* cleanup parser and defaults

* remove debug point

* setup E2E Testing

* linters

* formatting

* fmt plus name support on time series data

* code gen

backend/app/api/static/docs/swagger.yaml

@@ -24,6 +24,8 @@ definitions:
     type: object
   repo.GroupStatistics:
     properties:
+      totalItemPrice:
+        type: number
       totalItems:
         type: integer
       totalLabels:
@@ -32,6 +34,8 @@ definitions:
         type: integer
       totalUsers:
         type: integer
+      totalWithWarranty:
+        type: integer
     type: object
   repo.GroupUpdate:
     properties:
@@ -392,6 +396,15 @@ definitions:
       total:
         type: integer
     type: object
+  repo.TotalsByOrganizer:
+    properties:
+      id:
+        type: string
+      name:
+        type: string
+      total:
+        type: number
+    type: object
   repo.UserOut:
     properties:
       email:
@@ -416,6 +429,30 @@ definitions:
       name:
         type: string
     type: object
+  repo.ValueOverTime:
+    properties:
+      end:
+        type: string
+      entries:
+        items:
+          $ref: '#/definitions/repo.ValueOverTimeEntry'
+        type: array
+      start:
+        type: string
+      valueAtEnd:
+        type: number
+      valueAtStart:
+        type: number
+    type: object
+  repo.ValueOverTimeEntry:
+    properties:
+      date:
+        type: string
+      name:
+        type: string
+      value:
+        type: number
+    type: object
   server.ErrorResponse:
     properties:
       error:
@@ -608,9 +645,64 @@ paths:
             $ref: '#/definitions/repo.GroupStatistics'
       security:
       - Bearer: []
-      summary: Get the current user's group
+      summary: Get the current user's group statistics
       tags:
-      - Group
+      - Statistics
+  /v1/groups/statistics/labels:
+    get:
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            items:
+              $ref: '#/definitions/repo.TotalsByOrganizer'
+            type: array
+      security:
+      - Bearer: []
+      summary: Get the current user's group statistics
+      tags:
+      - Statistics
+  /v1/groups/statistics/locations:
+    get:
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            items:
+              $ref: '#/definitions/repo.TotalsByOrganizer'
+            type: array
+      security:
+      - Bearer: []
+      summary: Get the current user's group statistics
+      tags:
+      - Statistics
+  /v1/groups/statistics/purchase-price:
+    get:
+      parameters:
+      - description: start date
+        in: query
+        name: start
+        type: string
+      - description: end date
+        in: query
+        name: end
+        type: string
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/repo.ValueOverTime'
+      security:
+      - Bearer: []
+      summary: Queries the changes overtime of the purchase price over time
+      tags:
+      - Statistics
   /v1/items:
     get:
       parameters:
@@ -846,29 +938,6 @@ paths:
       summary: retrieves an attachment for an item
       tags:
       - Items Attachments
-  /v1/items/{id}/attachments/download:
-    get:
-      parameters:
-      - description: Item ID
-        in: path
-        name: id
-        required: true
-        type: string
-      - description: Attachment token
-        in: query
-        name: token
-        required: true
-        type: string
-      produces:
-      - application/octet-stream
-      responses:
-        "200":
-          description: OK
-      security:
-      - Bearer: []
-      summary: retrieves an attachment for an item
-      tags:
-      - Items Attachments
   /v1/items/import:
     post:
       parameters: