Fetch all variations from the ProductsViewController

Author: Ecarrion

WooCommerce/Classes/ViewRelated/Products/Variations/ProductVariationsViewController.swift

@@ -612,8 +612,7 @@ private extension ProductVariationsViewController {
             case .single:
                 self.createVariation()
             case .all:
-                // TODO: Start generate all variations flow
-                break
+                self.generateAllVariations()
             }
 
         }
@@ -692,6 +691,16 @@ extension ProductVariationsViewController: SyncingCoordinatorDelegate {
             }
         }
     }
+
+    /// Generates all possible variations for the product attibutes.
+    ///
+    private func generateAllVariations() {
+        viewModel.generateAllVariations(for: product)
+        // TODO:
+        // - Show Loading Indicator
+        // - Alert if there are more than 100 variations to create
+        // - Hide Loading Indicator
+    }
 }
 
 // MARK: - Finite State Machine Management

WooCommerce/Classes/ViewRelated/Products/Variations/ProductVariationsViewModel.swift

@@ -25,6 +25,23 @@ final class ProductVariationsViewModel {
         useCase.generateVariation(onCompletion: onCompletion)
     }
 
+    /// Generates all missing variations for a product. Up to 100 variations.
+    ///
+    func generateAllVariations(for product: Product) {
+        let action = ProductVariationAction.synchronizeAllProductVariations(siteID: product.siteID, productID: product.productID) { result in
+            // Temp
+            let fetched = ServiceLocator.storageManager.viewStorage.loadProductVariations(siteID: product.siteID, productID: product.productID)
+            print("Synchronized \(fetched?.count ?? 0) variations")
+        }
+        stores.dispatch(action)
+
+        // TODO:
+        // - Generate all variations locally
+        // - Substract already created variations
+        // - Alert if there are more than 100 variations to create
+        // - Create variations remotely
+    }
+
     /// Updates the internal `formType` to `edit` if  the given product exists remotely and previous formType was `.add`
     ///
     func updatedFormTypeIfNeeded(newProduct: Product) {

Yosemite/Yosemite/Stores/ProductVariationStore.swift

@@ -66,7 +66,7 @@ private extension ProductVariationStore {
     /// Synchronizes all the product reviews associated with a given Site ID (if any!).
     ///
     func synchronizeAllProductVariations(siteID: Int64, productID: Int64, onCompletion: @escaping (Result<Void, Error>) -> Void) {
-        let maxPageSize = 30 // API only allows to fetch a max of 100 variations at a time
+        let maxPageSize = 100 // API only allows to fetch a max of 100 variations at a time
         recursivelySyncAllVariations(siteID: siteID,
                                      productID: productID,
                                      pageNumber: Default.firstPageNumber,