support edit password

pass/Controllers/EditPasswordTableViewController.swift

@@ -0,0 +1,53 @@
+//
+//  EditPasswordTableViewController.swift
+//  pass
+//
+//  Created by Mingshen Sun on 12/2/2017.
+//  Copyright © 2017 Bob Sun. All rights reserved.
+//
+
+import UIKit
+
+class EditPasswordTableViewController: PasswordEditorTableViewController {
+    
+    var password: Password?
+
+    override func viewDidLoad() {
+        tableData = [
+            [[.type: PasswordEditorCellType.textFieldCell, .title: "name", .content: password!.name]],
+            [[.type: PasswordEditorCellType.fillPasswordCell, .title: "password", .content: password!.password]],
+            [[.type: PasswordEditorCellType.textViewCell, .title: "additions", .content: password!.getAdditionsPlainText()]],
+        ]
+        sectionHeaderTitles = ["name", "password", "additions"].map {$0.uppercased()}
+        super.viewDidLoad()
+    }
+    
+    override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {
+        if identifier == "saveEditPasswordSegue" {
+            let nameCell = tableView.cellForRow(at: IndexPath(row: 0, section: 0)) as! ContentTableViewCell
+            if nameCell.getContent() != password?.name {
+                let alertMessage = "Editing name is not supported."
+                let alert = UIAlertController(title: "Cannot Save Edit", message: alertMessage, preferredStyle: UIAlertControllerStyle.alert)
+                alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
+                self.present(alert, animated: true) {
+                    nameCell.setContent(content: self.password!.name)
+                }
+                return false
+            }
+        }
+        return true
+    }
+    
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+        let cells = tableView.visibleCells
+        var cellContents = [String: String]()
+        for cell in cells {
+            let indexPath = tableView.indexPath(for: cell)!
+            let contentCell = cell as! ContentTableViewCell
+            let cellTitle = tableData[indexPath.section][indexPath.row][.title] as! String
+            cellContents[cellTitle] = contentCell.getContent()!
+        }
+        password!.updatePassword(name: cellContents["name"]!, plainText: "\(cellContents["password"]!)\n\(cellContents["additions"]!)")
+    }
+
+}