Store Data in Realm Database

RealmManager.swift

import Realm
import RealmSwift

/*
https://realm.io/docs/swift/latest/
https://github.com/realm/realm-cocoa
https://www.raywenderlich.com/9220-realm-tutorial-getting-started
https://medium.com/flawless-app-stories/crud-operation-using-realmswift-part-1-17a99de83cc1
https://medium.com/@aliakhtar_16369/realm-notifications-realmswift-part-2-60c66ab99ea9
https://medium.com/@aliakhtar_16369/realm-custom-configuration-and-encryption-realmswift-part-3-f991f090ae22
*/

class RealmManager: NSObject {

}


public extension Realm {
    
    static func printDefaultConfiguration() {
        print("RealmManager :: Realm DB Default Configuration :: \(Realm.Configuration.defaultConfiguration)")
    }
    
    static func printDBPath() {
        print("RealmManager :: Realm DB Path :: \(Realm.Configuration.defaultConfiguration.fileURL?.absoluteString ?? "Realm DB Path Not Found")")
    }

    func safeAdd(object: Object) {
        self.add(object, update: .modified)
    }

    static func readData(_ block: (Realm) throws -> Void) {
        do {
            if let realm = try? Realm() {
                try block(realm)
            }
            else
            {
                Realm.removeOldRealmDataFile()
                // Re-try again
                let realm = try Realm()
                try block(realm)
            }
        } catch {
            print("RealmManager :: Error on Read Realm DB :: \(error.localizedDescription)")
        }
    }
    
    static func updateData(_ block: (Realm) throws -> Void) {
        do {
            if let realm = try? Realm() {
                realm.beginWrite()
                try block(realm)
                try realm.commitWrite()
            } else {
                Realm.removeOldRealmDataFile()
                // Re-try again
                let realm = try Realm()
                realm.beginWrite()
                try block(realm)
                try realm.commitWrite()
            }
        } catch {
            print("RealmManager :: Error on Write Realm DB :: \(error.localizedDescription)")
        }
    }

    static func removeOldRealmDataFile() {
        if let realmURL = Realm.Configuration.defaultConfiguration.fileURL {
            let realmURLs = [
                realmURL,
                realmURL.appendingPathExtension("lock"),
                realmURL.appendingPathExtension("note"),
                realmURL.appendingPathExtension("management"),
            ]
            
            for URL in realmURLs {
                do {
                    try FileManager.default.removeItem(at: URL)
                } catch {
                    print("RealmManager :: Still failed when try to remove old realm data files.")
                }
            }
        }
        else
        {
            print("RealmManager :: Still failed when find realm url.")
        }
    }
}

Uses.rtf

//Stuffbee

// Write to Realm
Realm.updateData({ realm in
    realm.safeAdd(object: objModel)
})


// Read from Realm
var models: [Model]?
Realm.readData { realm in
    let modelsFromDB = realm.objects(Model.self) //Result in [Model]
    let modelsFromDBWithFilter = modelsFromDB.filter { $0.itemId == itemId }
}

// Remove
Realm.readData { realm in
            let modelsFromDB = realm.objects(Model.self)
            try realm.write {
                realm.delete(modelsFromDB)
            }
        }