Implements #26: Add info command

mas-cli.xcodeproj/project.pbxproj

@@ -15,6 +15,7 @@
 		30EA893640B02CCF679F9C57 /* Option.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AD7FE171F643805F7BC38A7 /* Option.swift */; };
 		693A98991CBFFA760004D3B4 /* Search.swift in Sources */ = {isa = PBXBuildFile; fileRef = 693A98981CBFFA760004D3B4 /* Search.swift */; };
 		693A989B1CBFFAAA0004D3B4 /* NSURLSession+Synchronous.swift in Sources */ = {isa = PBXBuildFile; fileRef = 693A989A1CBFFAAA0004D3B4 /* NSURLSession+Synchronous.swift */; };
+		900A1E811DBAC8CB0069B1A8 /* Info.swift in Sources */ = {isa = PBXBuildFile; fileRef = 900A1E801DBAC8CB0069B1A8 /* Info.swift */; };
 		92AE0FD7BE06D64692E6C1E6 /* OrderedSet.swift in Sources */ = {isa = PBXBuildFile; fileRef = D9871C2273F4D762A1F19B07 /* OrderedSet.swift */; };
 		AD0785BC0EC6BBF4ED560DCC /* ArgumentParser.swift in Sources */ = {isa = PBXBuildFile; fileRef = EA9D96DDBBCCCC5944160ABE /* ArgumentParser.swift */; };
 		ADE553C828AF4EAFF39ED3E1 /* ArgumentProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B4237E5AA1A289D03D2A2FB8 /* ArgumentProtocol.swift */; };
@@ -59,6 +60,7 @@
 		693A98981CBFFA760004D3B4 /* Search.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Search.swift; sourceTree = "<group>"; };
 		693A989A1CBFFAAA0004D3B4 /* NSURLSession+Synchronous.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "NSURLSession+Synchronous.swift"; sourceTree = "<group>"; };
 		8FDC2B8063EC231E28353D23 /* HelpCommand.swift */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.swift; name = HelpCommand.swift; path = Seeds/Commandant/Sources/Commandant/HelpCommand.swift; sourceTree = "<group>"; };
+		900A1E801DBAC8CB0069B1A8 /* Info.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Info.swift; sourceTree = "<group>"; };
 		9257C5FABA335E5F060CB7F7 /* Result.swift */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.swift; name = Result.swift; path = Seeds/Result/Result/Result.swift; sourceTree = "<group>"; };
 		AF1B6BEDF32AF3F8A575FB1F /* Switch.swift */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.swift; name = Switch.swift; path = Seeds/Commandant/Sources/Commandant/Switch.swift; sourceTree = "<group>"; };
 		B4237E5AA1A289D03D2A2FB8 /* ArgumentProtocol.swift */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.swift; name = ArgumentProtocol.swift; path = Seeds/Commandant/Sources/Commandant/ArgumentProtocol.swift; sourceTree = "<group>"; };
@@ -206,6 +208,7 @@
 				EDE296521C700F4300554778 /* SignOut.swift */,
 				EDD3B3621C34709400B56B88 /* Upgrade.swift */,
 				EDB6CE8B1BAEC3D400648B4D /* Version.swift */,
+				900A1E801DBAC8CB0069B1A8 /* Info.swift */,
 			);
 			name = Commands;
 			path = "mas-cli/Commands";
@@ -351,6 +354,7 @@
 				ED0F23871B87537200AE40CD /* Account.swift in Sources */,
 				F184B6B7CD9C013CACDED0FB /* Argument.swift in Sources */,
 				AD0785BC0EC6BBF4ED560DCC /* ArgumentParser.swift in Sources */,
+				900A1E811DBAC8CB0069B1A8 /* Info.swift in Sources */,
 				ADE553C828AF4EAFF39ED3E1 /* ArgumentProtocol.swift in Sources */,
 				0C47E694564FCB59996690DD /* Command.swift in Sources */,
 				ED0F238B1B87569C00AE40CD /* Downloader.swift in Sources */,

mas-cli/Commands/Info.swift

@@ -0,0 +1,105 @@
+//
+//  Info.swift
+//  mas-cli
+//
+//  Created by Denis Lebedev on 21/10/2016.
+//  Copyright © 2016 Andrew Naylor. All rights reserved.
+//
+
+import Foundation
+
+struct InfoCommand: CommandProtocol {
+    let verb = "info"
+    let function = "Display app information from the Mac App Store"
+
+    func run(_ options: InfoOptions) -> Result<(), MASError> {
+        guard let infoURLString = infoURLString(options.appId),
+            let searchJson = URLSession.requestSynchronousJSONWithURLString(infoURLString) as? [String: Any] else {
+                return .failure(.searchFailed)
+        }
+
+        guard let resultCount = searchJson[ResultKeys.ResultCount] as? Int, resultCount > 0,
+            let results = searchJson[ResultKeys.Results] as? [[String: Any]],
+            let result = results.first else {
+                print("No results found")
+                return .failure(.noSearchResultsFound)
+        }
+
+        print(AppInfoFormatter.format(appInfo: result))
+
+        return .success(())
+    }
+
+    private func infoURLString(_ appId: String) -> String? {
+        if let urlEncodedAppId = appId.URLEncodedString {
+            return "https://itunes.apple.com/lookup?id=\(urlEncodedAppId)"
+        }
+        return nil
+    }
+}
+
+struct InfoOptions: OptionsProtocol {
+    let appId: String
+
+    static func create(_ appId: String) -> InfoOptions {
+        return InfoOptions(appId: appId)
+    }
+
+    static func evaluate(_ m: CommandMode) -> Result<InfoOptions, CommandantError<MASError>> {
+        return create
+            <*> m <| Argument(usage: "the app id to show info")
+    }
+}
+
+private struct AppInfoFormatter {
+
+    private enum Keys {
+        static let Name = "trackCensoredName"
+        static let Version = "version"
+        static let Price = "formattedPrice"
+        static let Seller = "sellerName"
+        static let VersionReleaseDate = "currentVersionReleaseDate"
+        static let MinimumOS = "minimumOsVersion"
+        static let FileSize = "fileSizeBytes"
+        static let AppStoreUrl = "trackViewUrl"
+    }
+
+    static func format(appInfo: [String: Any]) -> String {
+        let headline = [
+            "\(appInfo.stringOrEmpty(key: Keys.Name))",
+            "\(appInfo.stringOrEmpty(key: Keys.Version))",
+            "[\(appInfo.stringOrEmpty(key: Keys.Price))]",
+        ].joined(separator: " ")
+
+        return [
+            headline,
+            "By: \(appInfo.stringOrEmpty(key: Keys.Seller))",
+            "Released: \(humaReadableDate(appInfo.stringOrEmpty(key: Keys.VersionReleaseDate)))",
+            "Minimum OS: \(appInfo.stringOrEmpty(key: Keys.MinimumOS))",
+            "Size: \(humanReadableSize(appInfo.stringOrEmpty(key: Keys.FileSize)))",
+            "From: \(appInfo.stringOrEmpty(key: Keys.AppStoreUrl))",
+        ].joined(separator: "\n")
+    }
+
+    private static func humanReadableSize(_ size: String) -> String {
+        let bytesSize = Int64(size) ?? 0
+        return ByteCountFormatter.string(fromByteCount: bytesSize, countStyle: .file)
+    }
+
+    private static func humaReadableDate(_ serverDate: String) -> String {
+        let serverDateFormatter = DateFormatter()
+        serverDateFormatter.locale = Locale(identifier: "en_US_POSIX")
+        serverDateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
+
+        let humanDateFormatter = DateFormatter()
+        humanDateFormatter.timeStyle = .none
+        humanDateFormatter.dateStyle = .medium
+        return serverDateFormatter.date(from: serverDate).flatMap(humanDateFormatter.string(from:)) ?? ""
+    }
+}
+
+extension Dictionary {
+    fileprivate func stringOrEmpty(key: Key) -> String {
+        return self[key] as? String ?? ""
+    }
+}

mas-cli/Commands/Search.swift

@@ -42,7 +42,7 @@ struct SearchCommand: CommandProtocol {
     }
 
     func searchURLString(_ appName: String) -> String? {
-        if let urlEncodedAppName = appName.URLEncodedString() {
+        if let urlEncodedAppName = appName.URLEncodedString {
             return "https://itunes.apple.com/search?entity=macSoftware&term=\(urlEncodedAppName)&attribute=allTrackTerm"
         }
         return nil

mas-cli/NSURLSession+Synchronous.swift

@@ -55,9 +55,8 @@ public extension URLSession {
 public extension String {
 
     /// Return an URL encoded string
-    func URLEncodedString() -> String? {
-        let customAllowedSet = CharacterSet.urlQueryAllowed
-        return addingPercentEncoding(withAllowedCharacters: customAllowedSet)
+    var URLEncodedString: String? {
+        return addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
     }
 }
 

mas-cli/main.swift

@@ -17,6 +17,7 @@ public struct StderrOutputStream: TextOutputStream {
 let registry = CommandRegistry<MASError>()
 let helpCommand = HelpCommand(registry: registry)
 registry.register(AccountCommand())
+registry.register(InfoCommand())
 registry.register(InstallCommand())
 registry.register(ListCommand())
 registry.register(OutdatedCommand())