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Custom Fields: Local editing logic (#14029)
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110 changes: 110 additions & 0 deletions
110
WooCommerce/Classes/ViewRelated/Custom Fields/CustomFieldsListViewModel.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| import Foundation | ||
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| final class CustomFieldsListViewModel: ObservableObject { | ||
| private let originalCustomFields: [CustomFieldViewModel] | ||
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| var shouldShowErrorState: Bool { | ||
| savingError != nil | ||
| } | ||
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| @Published private(set) var savingError: Error? | ||
| @Published private(set) var combinedList: [CustomFieldUI] = [] | ||
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| @Published private var editedFields: [CustomFieldUI] = [] | ||
| @Published private var addedFields: [CustomFieldUI] = [] | ||
| var hasChanges: Bool { | ||
| !editedFields.isEmpty || !addedFields.isEmpty | ||
| } | ||
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| init(customFields: [CustomFieldViewModel]) { | ||
| self.originalCustomFields = customFields | ||
| updateCombinedList() | ||
| } | ||
| } | ||
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| // MARK: - Items actions | ||
| extension CustomFieldsListViewModel { | ||
| /// Params: | ||
| /// - index: The index of field to be edited, taken from the `combinedList` array | ||
| /// - newField: The new content for the custom field in question | ||
| func editField(at index: Int, newField: CustomFieldUI) { | ||
| guard index >= 0 && index < combinedList.count else { | ||
| DDLogError("⛔️ Error: Invalid index for editing a custom field") | ||
| return | ||
| } | ||
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| let oldField = combinedList[index] | ||
| if newField.fieldId == nil { | ||
| // When editing a field that has no id yet, it means the field has only been added locally. | ||
| editLocallyAddedField(oldField: oldField, newField: newField) | ||
| } else { | ||
| if let existingId = oldField.fieldId { | ||
| editExistingField(idToEdit: existingId, newField: newField) | ||
| } else { | ||
| DDLogError("⛔️ Error: Trying to edit an existing field but it has no id. It might be the wrong field to edit.") | ||
| } | ||
| } | ||
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| updateCombinedList() | ||
| } | ||
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| func addField(_ field: CustomFieldUI) { | ||
| addedFields.append(field) | ||
| updateCombinedList() | ||
| } | ||
| } | ||
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| private extension CustomFieldsListViewModel { | ||
| func editLocallyAddedField(oldField: CustomFieldUI, newField: CustomFieldUI) { | ||
| if let index = addedFields.firstIndex(where: { $0.key == oldField.key }) { | ||
| addedFields[index] = newField | ||
| } else { | ||
| // This shouldn't happen in normal flow, but logging just in case | ||
| DDLogError("⛔️ Error: Trying to edit a locally added field that doesn't exist in addedFields") | ||
| } | ||
| } | ||
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| /// Checking by id when editing an existing field since existing fields will always have them. | ||
| func editExistingField(idToEdit: Int64, newField: CustomFieldUI) { | ||
| guard idToEdit == newField.fieldId else { | ||
| DDLogError("⛔️ Error: Trying to edit existing field but supplied new id is different.") | ||
| return | ||
| } | ||
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| if let index = editedFields.firstIndex(where: { $0.fieldId == idToEdit }) { | ||
| // Existing field has been locally edited, let's update it again | ||
| editedFields[index] = newField | ||
| } else { | ||
| // First time the field is locally edited | ||
| editedFields.append(newField) | ||
| } | ||
| } | ||
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| func updateCombinedList() { | ||
| let editedList = originalCustomFields.map { field in | ||
| editedFields.first { $0.fieldId == field.id } ?? CustomFieldUI(customField: field) | ||
| } | ||
| combinedList = editedList + addedFields | ||
| } | ||
| } | ||
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| extension CustomFieldsListViewModel { | ||
| struct CustomFieldUI: Identifiable { | ||
| let id = UUID() | ||
| let key: String | ||
| let value: String | ||
| let fieldId: Int64? | ||
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| init(key: String, value: String, fieldId: Int64? = nil) { | ||
| self.key = key | ||
| self.value = value | ||
| self.fieldId = fieldId | ||
| } | ||
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| init(customField: CustomFieldViewModel) { | ||
| self.key = customField.title | ||
| self.value = customField.content | ||
| self.fieldId = customField.id | ||
| } | ||
| } | ||
| } |
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