Search using NSpredicate - swift

Question

I am making an app for smartsearch. I have implemented through making parameters into string then append the strings.Then for search i am implementing filter to search from the search. But its getting lengthy. I want it in compact using NSPredicate.
My code is here. Can anyone make it using NSPredicate and NSCompoundPredicate
import UIKit
struct Request{
var type:String!
var firstName:String!
var lastName:String!
var combineString:String {
get {
let text = "\(self.type!) \(self.firstName) \(self.lastName)"
return text
}
}
init() {
self.type = ""
self.firstName = ""
self.lastName = ""
}
init(_ type:String,_ firstName:String,_ lastName:String) {
self.type = type
self.firstName = firstName
self.lastName = lastName
}}
class ViewController: UIViewController,UITableViewDelegate, UITableViewDataSource {
#IBOutlet var searchbar:UISearchBar!
#IBOutlet var headline:UILabel!
#IBOutlet var table:UITableView!
var type:Array = [String]()
var firstName:Array = [String]()
var lastName:Array = [String]()
var tempResults = Array<[Request]>()
var requestArray = Array<Request>()
var filteredArray = Array<Request>()
var isSearching = false
type = [“4343”, “45450”, “68468”, “4686”, “56461”, “48661”]
firstName = [“Tom”, “Michel”, “Steve”, “Rahul”, “Iswar”, “Kuldeep”]
lastName = [“Moody”, “Clark”, “Smith”, “Kumar”, “Pandey”, “Yadav”]
for i in 0..<requestTypeArr.count {
let type = self.type[i]
let firstName = self.firstName[i]
let lastName = self.lastName[i]
var request = Request()
request.type = type
request.firstName = firstName
request.lastName = lastName
self.requestArray.append(request)
}
let string = String(format: "Total list No %ld", self.requestArray.count)
self.headline.text = string
self.table.delegate = self
self.table.dataSource = self
self.table.contentInset = UIEdgeInsets(top: 44, left: 0, bottom: 0, right: 0)
self.table.estimatedRowHeight = 44
self.table.rowHeight = UITableViewAutomaticDimension
self.searchbar.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if self.isSearching == true {
return self.filteredArray.count
}
return self.requestArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "RquestDetailTableViewCell") as! RquestDetailTableViewCell
var request = self.requestArray[indexPath.row]
if self.isSearching == true {
request = self.filteredArray[indexPath.row]
}
cell.type.text = request.type
cell.firstName.text = request.firstName
cell.lastName.text = request.lastName
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}}
extension ViewController : UISearchBarDelegate {
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
self.isSearching = true
// self.table.reloadSections([0], with: .automatic)
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
//Filter one
//print("Search Query:- \(searchText)")
if searchText.components(separatedBy: .whitespaces).joined(separator: "").characters.count == 0 {
if self.isSearching == true {
self.isSearching = false
self.filteredArray = Array<Request>()
self.tempResults = Array<[Request]>()
}
}else {
if self.isSearching == false {
self.isSearching = true
}
var temp = Array<Request>()
if self.tempResults.count == 0 {
temp = self.requestArray.filter({ (object) -> Bool in
//print("\nSearch Text = \(searchText.lowercased()) \nand Source Combine String = \(object.combineString.lowercased())")
let lowercaseInput = searchText.lowercased()
let lowercaseSource = object.combineString.lowercased()
let sourceComponents = lowercaseSource.components(separatedBy: .whitespaces)
let inputComponents = lowercaseInput.components(separatedBy: .whitespaces)
let sourceSet = Set(sourceComponents)
var inputSet = Set(inputComponents)
if let index = inputSet.index(of: ""){
_ = inputSet.remove(at: index)
}
var filtered = [String]()
inputSet.forEach({ (word) in
let temp = sourceSet.filter({$0.contains(word)})
//let temp2 = sourceSet.filter({$0.hasPrefix(word)})
filtered.append(contentsOf: temp)
// let temp2 = sourceSet.filter({$0.hasPrefix(word)})
//filtered.append(contentsOf: temp2)
})
let set = Set(filtered)
var isOK = set.isSubset(of: sourceSet)
if set.count == 0 {
isOK = false
}
return isOK
})
self.filteredArray = temp
}else {
if let last = self.tempResults.last {
temp = last.filter({ (object) -> Bool in
let lowercaseInput = searchText.lowercased()
let lowercaseSource = object.combineString.lowercased()
let lastInputWord = lowercaseInput.components(separatedBy: .whitespaces).last!
let sourceComponents = lowercaseSource.components(separatedBy: .whitespaces)
let inputComponents = [lastInputWord]
let sourceSet = Set(sourceComponents)
let inputSet = Set(inputComponents)
var filtered = [String]()
inputSet.forEach({ (word) in
let temp = sourceSet.filter({$0.contains(word)})
//let temp2 = sourceSet.filter({$0.hasPrefix(word)})
filtered.append(contentsOf: temp)
})
let set = Set(filtered)
var isOK = set.isSubset(of: sourceSet)
if set.count == 0 {
isOK = false
}
return isOK
})
self.filteredArray = temp
}
}
}
self.table.reloadSections([0], with: .automatic)
}
func searchBar(_ searchBar: UISearchBar, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
if text == " " {
self.tempResults.append(self.filteredArray)
}
if range.length == 1 {
//Handle Backspace/delete
let string = searchBar.text! as NSString
let temp = string.substring(with: range) as String
let newRange = string.range(of: temp, options: .backwards)
let newText = string.replacingCharacters(in: newRange, with: "")
let words = newText.components(separatedBy: .whitespaces).count
if words > 1 {
print("word count = \(words)")
let count = self.tempResults.count
if count > words {
self.tempResults.removeLast()
}
}else {
self.tempResults = Array<[Request]>()
}
}
return true
}
}