2017-09-02 19:11:19 +02:00
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//
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// DatabaseRelatedObjectsTable.swift
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// RSDatabase
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//
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// Created by Brent Simmons on 9/2/17.
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// Copyright © 2017 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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2017-09-11 22:11:29 +02:00
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// Protocol for a database table for related objects — authors, tags, and attachments in Evergreen, for instance.
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2017-09-02 19:11:19 +02:00
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public protocol DatabaseRelatedObjectsTable: DatabaseTable {
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var databaseIDKey: String { get}
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func fetchObjectsWithIDs(_ databaseIDs: Set<String>, in database: FMDatabase) -> [DatabaseObject]
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func objectsWithResultSet(_ resultSet: FMResultSet) -> [DatabaseObject]
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func objectWithRow(_ row: FMResultSet) -> DatabaseObject?
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func save(_ objects: [DatabaseObject], in database: FMDatabase)
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}
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public extension DatabaseRelatedObjectsTable {
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// MARK: Default implementations
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func fetchObjectsWithIDs(_ databaseIDs: Set<String>, in database: FMDatabase) -> [DatabaseObject] {
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guard let resultSet = selectRowsWhere(key: databaseIDKey, inValues: Array(databaseIDs), in: database) else {
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return [DatabaseObject]()
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}
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return objectsWithResultSet(resultSet)
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}
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func objectsWithResultSet(_ resultSet: FMResultSet) -> [DatabaseObject] {
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return resultSet.flatMap(objectWithRow)
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}
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}
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