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Prevent newly added sync status records from being deleted and process them incrementally

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This commit is contained in:
Maurice Parker
2020-05-02 22:52:13 -05:00
parent e681fd6402
commit 578d22f3c2
3 changed files with 61 additions and 46 deletions
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9
Frameworks/SyncDatabase/SyncStatusTable.swift
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@@ -20,7 +20,7 @@ struct SyncStatusTable: DatabaseTable {
self.queue = queue
}
func selectForProcessing(_ completion: @escaping SyncStatusesCompletionBlock) {
func selectForProcessing(limit: Int?, completion: @escaping SyncStatusesCompletionBlock) {
queue.runInTransaction { databaseResult in
var statuses = Set<SyncStatus>()
var error: DatabaseError?
@@ -29,7 +29,10 @@ struct SyncStatusTable: DatabaseTable {
let updateSQL = "update syncStatus set selected = true"
database.executeUpdate(updateSQL, withArgumentsIn: nil)
let selectSQL = "select * from syncStatus where selected == true"
var selectSQL = "select * from syncStatus where selected == true"
if let limit = limit {
selectSQL = "\(selectSQL) limit \(limit)"
}
if let resultSet = database.executeQuery(selectSQL, withArgumentsIn: nil) {
statuses = resultSet.mapToSet(self.statusWithRow)
}
@@ -135,7 +138,7 @@ struct SyncStatusTable: DatabaseTable {
func makeDatabaseCall(_ database: FMDatabase) {
let parameters = articleIDs.map { $0 as AnyObject }
let placeholders = NSString.rs_SQLValueList(withPlaceholders: UInt(articleIDs.count))!
let deleteSQL = "delete from syncStatus where articleID in \(placeholders)"
let deleteSQL = "delete from syncStatus where selected = true and articleID in \(placeholders)"
database.executeUpdate(deleteSQL, withArgumentsIn: parameters)
}