git.r.bdr.sh - rbdr/lyricli/blob - Sources/configuration.swift

   1 import Foundation
   2
   3 // Reads and writes the configuration. Config keys are accessed as a dictionary.
   4 class Configuration {
   5     // Location of the global configuration file
   6     private let configurationPath = NSString(string: "~/.lyricli.conf").expandingTildeInPath
   7
   8     // Default options, will be automatically written to the global config if
   9     // not found.
  10     private var configuration: [String: Any] =  [
  11         "enabled_sources": ["arguments", "itunes"]
  12     ]
  13
  14     // The shared instance of the object
  15     static let shared: Configuration = Configuration()
  16
  17     private init() {
  18
  19         // Read the config file and attempt to set any of the values. Otherwise
  20         // don't do anything.
  21
  22         if let data = try? NSData(contentsOfFile: configurationPath) as Data {
  23             if let parsedConfig = try? JSONSerialization.jsonObject(with: data) {
  24                 if let parsedConfig = parsedConfig as? [String: Any] {
  25                     for (key, value) in parsedConfig {
  26
  27                         if key == "enabled_sources" {
  28                             if let value = value as? [String] {
  29                                 configuration[key] = value
  30                             }
  31                         } else {
  32                             if let value = value as? String {
  33                                 configuration[key] = value
  34                             }
  35                         }
  36                     }
  37                 }
  38             }
  39         }
  40
  41         writeConfiguration()
  42     }
  43
  44     // Write the configuration back to the file
  45     private func writeConfiguration() {
  46
  47         var error: NSError?
  48
  49         if let outputStream = OutputStream(toFileAtPath: configurationPath, append: false) {
  50             outputStream.open()
  51             JSONSerialization.writeJSONObject(configuration,
  52                     to: outputStream,
  53                     options: [JSONSerialization.WritingOptions.prettyPrinted],
  54                     error: &error)
  55             outputStream.close()
  56         }
  57     }
  58
  59     // Allow access to the config properties as a dictionary
  60     subscript(index: String) -> Any? {
  61         get {
  62             return configuration[index]
  63         }
  64
  65         set(newValue) {
  66             configuration[index] = newValue
  67             writeConfiguration()
  68         }
  69     }
  70 }