Revert "Revert "Add publishing date (#107)" (#108)" (#109)

This reverts commit b1da0b547e.

src/schema.graphql

@@ -236,6 +236,7 @@ type Product {
   browsable: Boolean!
   inserted: DateTime!
   updated: DateTime
+  publishingDate: DateTime!
   printProducts: [PrintProduct]
   blacklisting: [ProductBlacklist]
   categories: [Category]
@@ -405,6 +406,7 @@ input ProductInfoInput {
   designerId: Int
   browsable: Boolean!
   visible: Boolean!
+  publishingDate: DateTime!
   printFileWidth: Int!
   printFileHeight: Int!
   printFileDpi: Int!
@@ -435,8 +437,9 @@ type IdNumberResult {
 }
 
 type Mutation {
-
-  """ Product """
+  """
+  Product
+  """
   addProduct(name: String!, batch: String): Product
   productInfo(productId: Int!, info: ProductInfoInput!): Product
   productWallpaperType(
@@ -447,8 +450,9 @@ type Mutation {
     productId: Int!
     markets: [ProductBlacklistingInput]
   ): Product
-
-  """ Product Image """
+  """
+  Product Image
+  """
   productFocusPoint(
     productId: Int!
     focusXpoint2: Float!
@@ -465,22 +469,32 @@ type Mutation {
     height: Int!
   ): String
 
-  """ Product Relations """
+  """
+  Product Relations
+  """
   addRelatedProducts(productId: Int!, articleNumbers: [String]!): Product
   removeRelatedProducts(productId: Int!, relatedProductIds: [Int]!): Product
 
-  """ Product Categories """
+  """
+  Product Categories
+  """
   addCategoriesToProduct(productId: Int!, categoryIds: [Int]!): Product
   removeCategoriesFromProduct(productId: Int!, categoryIds: [Int]!): Product
 
-  """ Product Keywords """
+  """
+  Product Keywords
+  """
   productKeywords(productId: Int!, keywordIds: [Int]): Product
   addKeyword(name: String!, type: KeywordType): Keyword
 
-  """ Product Other """
+  """
+  Product Other
+  """
   updateProductComments(productId: Int!, comments: String!): Product
 
-  """ Printproducts """
+  """
+  Printproducts
+  """
   productGroup(productId: Int!, groupIds: [Int]): Product
   productGroupInteriors(productId: Int!, groupId: Int!, uris: [String]): Product
   addOwnInteriorToPrintProduct(
@@ -496,7 +510,9 @@ type Mutation {
     border: BorderType!
   ): PrintProductDefaults
 
-  """ Mass Update """
+  """
+  Mass Update
+  """
   massUpdatePublishing(
     productIds: [Int]!
     visible: Boolean
@@ -506,4 +522,5 @@ type Mutation {
     productIds: [Int]!
     markets: [ProductBlacklistingInput]
   ): StringResult
+  massUpdatePublishingDate(productIds: [Int]!, date: DateTime!): StringResult
 }