facade

README.md

@@ -14,6 +14,7 @@
 
 1. [Декоратор](decorator/)
 2. [Адаптер](adapter/)
+2. [Фасад](facade/)
 
 ### Пораждающие
 

adapter/README.md

@@ -12,8 +12,8 @@
 
 ![scheme-3](scheme-3.png)
 
-![scheme-3](scheme-4.png)
+![scheme-4](scheme-4.png)
 
-![scheme-3](scheme-5.png)
+![scheme-5](scheme-5.png)
 
-![scheme-3](scheme-6.png)
+![scheme-6](scheme-6.png)

facade/README.md

@@ -0,0 +1,17 @@
+# Фасад
+
+Структурный паттерн проектирования, который предоставляет простой интерфейс к сложной системе классов, библиотеке или фреймворку.
+
+Паттерн **Фасад** предоставляет унифицированный интерфейс к группе интерфейсов подсистемы. Фасад определяет высокоуровневый интерфейс, упрощающий работу с подсистемой.
+
+# Принципы
+
+- Принцип минимальной информированности: общайтесь только с близкими друзьями.
+
+## Схемы
+
+![scheme-1](scheme-1.png)
+
+![scheme-2](scheme-2.png)
+
+![scheme-3](scheme-3.png)

facade/hometheater/amplifier.d

@@ -0,0 +1,59 @@
+module amplifier;
+
+import tuner, streamingplayer;
+import std.stdio : writeln;
+import std.conv : to;
+
+class Amplifier
+{
+    private string description;
+    private Tuner tuner;
+    private StreamingPlayer player;
+
+    this(string description)
+    {
+        this.description = description;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void setStereoSound()
+    {
+        writeln(description ~ " stereo mode on");
+    }
+
+    void setSurroundSound()
+    {
+        writeln(description ~ " surround sound on (5 speakers, 1 subwoofer)");
+    }
+
+    void setVolume(int level)
+    {
+        writeln(description ~ " setting volume to " ~ level.to!string);
+    }
+
+    void setTuner(Tuner tuner)
+    {
+        writeln(description ~ " setting tuner to " ~ tuner.to!string);
+        this.tuner = tuner;
+    }
+
+    void setStreamingPlayer(StreamingPlayer player)
+    {
+        writeln(description ~ " setting Streaming player to " ~ player.to!string);
+        this.player = player;
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/app.d

@@ -0,0 +1,21 @@
+import amplifier, tuner, streamingplayer, cdplayer, projector, theaterlights, screen, popcornpopper, hometheaterfacade;
+
+void main()
+{
+    auto amp = new Amplifier("Amplifier");
+    auto tuner = new Tuner("AM/FM Tuner", amp);
+    auto player = new StreamingPlayer("Streaming Player", amp);
+    auto cd = new CdPlayer("CD Player", amp);
+    auto projector = new Projector("Projector", player);
+    auto lights = new TheaterLights("Theater Ceiling Lights");
+    auto screen = new Screen("Theater Screen");
+    auto popper = new PopcornPopper("Popcorn Popper");
+
+    auto homeTheater = new HomeTheaterFacade(amp, tuner, player, cd, projector, lights, screen, popper);
+
+    homeTheater.watchMovie("Raiders of the Lost Ark");
+    homeTheater.endMovie();
+
+    homeTheater.listenToRadio(101.5);
+    homeTheater.endRadio();
+}

facade/hometheater/cdplayer.d

@@ -0,0 +1,71 @@
+module cdplayer;
+
+import amplifier;
+import std.stdio : writeln;
+import std.conv : to;
+
+class CdPlayer
+{
+    private string description;
+    private int currentTrack;
+    private Amplifier amplifier;
+    private string title;
+
+    this(string description, Amplifier amplifier)
+    {
+        this.description = description;
+        this.amplifier = amplifier;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void eject()
+    {
+        title = null;
+        writeln(description ~ " eject");
+    }
+
+    void play(string title)
+    {
+        this.title = title;
+        currentTrack = 0;
+        writeln(description ~ " playing \"" ~ title ~ "\"");
+    }
+
+    void play(int track)
+    {
+        if (title is null)
+        {
+            writeln(description ~ " can't play track " ~ currentTrack.to!string ~ " no cd inserted");
+        }
+        else
+        {
+            currentTrack = track;
+            writeln(description ~ " playing track " ~ currentTrack.to!string);
+        }
+    }
+
+    void stop()
+    {
+        currentTrack = 0;
+        writeln(description ~ " stopped");
+    }
+
+    void pause()
+    {
+        writeln(description ~ " paused \"" ~ title ~ "\"");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/hometheaterfacade.d

@@ -0,0 +1,82 @@
+module hometheaterfacade;
+
+import std.stdio : writeln;
+import amplifier, tuner, streamingplayer, cdplayer, projector, theaterlights, screen, popcornpopper;
+
+class HomeTheaterFacade
+{
+    private Amplifier amp;
+    private Tuner tuner;
+    private StreamingPlayer player;
+    private CdPlayer cd;
+    private Projector projector;
+    private TheaterLights lights;
+    private Screen screen;
+    private PopcornPopper popper;
+
+    this(Amplifier amp,
+        Tuner tuner,
+        StreamingPlayer player,
+        CdPlayer cd,
+        Projector projector,
+        TheaterLights lights,
+        Screen screen,
+        PopcornPopper popper)
+    {
+        this.amp = amp;
+        this.tuner = tuner;
+        this.player = player;
+        this.cd = cd;
+        this.projector = projector;
+        this.lights = lights;
+        this.screen = screen;
+        this.popper = popper;
+    }
+
+    void watchMovie(string movie)
+    {
+        writeln("Get ready to watch a movie...");
+        popper.on();
+        popper.pop();
+        lights.dim(10);
+        screen.down();
+        projector.on();
+        projector.wideScreenMode();
+        amp.on();
+        amp.setStreamingPlayer(player);
+        amp.setSurroundSound();
+        amp.setVolume(5);
+        player.on();
+        player.play(movie);
+    }
+ 
+ 
+    void endMovie()
+    {
+        writeln("Shutting movie theater down...");
+        popper.off();
+        lights.on();
+        screen.up();
+        projector.off();
+        amp.off();
+        player.stop();
+        player.off();
+    }
+
+    void listenToRadio(double frequency)
+    {
+        writeln("Tuning in the airwaves...");
+        tuner.on();
+        tuner.setFrequency(frequency);
+        amp.on();
+        amp.setVolume(5);
+        amp.setTuner(tuner);
+    }
+
+    void endRadio()
+    {
+        writeln("Shutting down the tuner...");
+        tuner.off();
+        amp.off();
+    }
+}

facade/hometheater/popcornpopper.d

@@ -0,0 +1,34 @@
+module popcornpopper;
+
+import std.stdio : writeln;
+
+
+class PopcornPopper
+{
+    private string description;
+
+    this(string description)
+    {
+        this.description = description;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void pop()
+    {
+        writeln(description ~ " popping popcorn!");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/projector.d

@@ -0,0 +1,41 @@
+module projector;
+
+import streamingplayer;
+import std.stdio : writeln;
+
+class Projector
+{
+    private string description;
+    private StreamingPlayer player;
+
+    this(string description, StreamingPlayer player)
+    {
+        this.description = description;
+        this.player = player;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void wideScreenMode()
+    {
+        writeln(description ~ " in widescreen mode (16x9 aspect ratio)");
+    }
+
+    void tvMode()
+    {
+        writeln(description ~ " in tv mode (4x3 aspect ratio)");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/screen.d

@@ -0,0 +1,28 @@
+module screen;
+
+import std.stdio : writeln;
+
+class Screen
+{
+    private string description;
+
+    this(string description)
+    {
+        this.description = description;
+    }
+
+    void up()
+    {
+        writeln(description ~ " going up");
+    }
+
+    void down()
+    {
+        writeln(description ~ " going down");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/streamingplayer.d

@@ -0,0 +1,75 @@
+module streamingplayer;
+
+import amplifier;
+import std.stdio : writeln;
+import std.conv : to;
+
+class StreamingPlayer
+{
+    private string description;
+    private int currentChapter;
+    private Amplifier amplifier;
+    private string movie;
+
+    this(string description, Amplifier amplifier)
+    {
+        this.description = description;
+        this.amplifier = amplifier;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void play(string movie)
+    {
+        this.movie = movie;
+        currentChapter = 0;
+        writeln(description ~ " playing \"" ~ movie ~ "\"");
+    }
+
+    void play(int chapter)
+    {
+        if (movie is null)
+        {
+            writeln(description ~ " can't play chapter " ~ chapter.to!string ~ " on movie selected");
+        }
+        else
+        {
+            currentChapter = chapter;
+            writeln(description ~ " playing chapter " ~ currentChapter.to!string ~ " off \"" ~ movie ~ "\"");
+        }
+    }
+
+    void stop()
+    {
+        currentChapter = 0;
+        writeln(description ~ " stopped \"" ~ movie ~ "\"");
+    }
+
+    void pause()
+    {
+        writeln(description ~ " paused \"" ~ movie ~ "\"");
+    }
+
+    void setTwoChannelAudio()
+    {
+        writeln(description ~ " set two channel audio");
+    }
+
+    void setSurroundAudio()
+    {
+        writeln(description ~ " set surround audio");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/theaterlights.d

@@ -0,0 +1,34 @@
+module theaterlights;
+
+import std.stdio : writeln;
+import std.conv : to;
+
+class TheaterLights
+{
+    private string description;
+
+    this(string description)
+    {
+        this.description = description;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void dim(int level)
+    {
+        writeln(description ~ " dimming to " ~ level.to!string ~ "%");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}

facade/hometheater/tuner.d

@@ -0,0 +1,49 @@
+module tuner;
+
+import amplifier;
+import std.stdio : writeln;
+import std.conv : to;
+
+class Tuner
+{
+    private string description;
+    private Amplifier amplifier;
+    private double frequency;
+
+    this(string description, Amplifier amplifier)
+    {
+        this.description = description;
+        this.amplifier = amplifier;
+    }
+
+    void on()
+    {
+        writeln(description ~ " on");
+    }
+
+    void off()
+    {
+        writeln(description ~ " off");
+    }
+
+    void setFrequency(double frequency)
+    {
+        writeln(description ~ " setting frequency to " ~ frequency.to!string);
+        this.frequency = frequency;
+    }
+
+    void setAm()
+    {
+        writeln(description ~ " setting AM mode");
+    }
+
+    void setFm()
+    {
+        writeln(description ~ " setting FM mode");
+    }
+
+    override string toString() const
+    {
+        return description;
+    }
+}