#29 - TypeScript

Author: Sac-Corts

Roadmap/29 - SOLID ISP/typescript/Sac-Corts.ts

@@ -0,0 +1,157 @@
+// Wrong way
+class Device {
+    turnOn(): void {}
+    turnOff(): void {}
+    charge(): void {}
+    connectToInternet(): void {}
+}
+
+class Laptop extends Device {
+    turnOn(): void {
+        console.log("Laptop turned on");
+    }
+
+    turnOff(): void {
+        console.log("Laptop turned off");
+    }
+
+    charge(): void {
+        console.log("Laptop charging");
+    }
+
+    connectToInternet(): void {
+        console.log("Laptop connected to the internet");
+    }
+}
+
+class Microwave extends Device {
+    turnOn(): void {
+        console.log("Microwave turned on");
+    }
+
+    turnOff(): void {
+        console.log("Microwave turned off");
+    }
+
+    charge(): void {
+        throw new Error("A microwave doesn't need to be charged");
+    }
+
+    connectToInternet(): void {
+        throw new Error("A microwave doesn't need to be connected to the internet");
+    }
+}
+
+const microwave = new Microwave();
+// microwave.charge();  // Error
+
+// Correct way
+class Switchable {
+    turnOn(): void {}
+    turnOff(): void {}
+}
+
+class Chargeable {
+    charge(): void {}
+}
+
+class InternetConnectable {
+    connectToInternet(): void {}
+}
+
+class Laptop2 extends Switchable {
+    turnOn(): void {
+        console.log("Laptop turned on");
+    }
+
+    turnOff(): void {
+        console.log("Laptop turned off");
+    }
+}
+
+class AdvancedLaptop extends Laptop2 implements Chargeable, InternetConnectable {
+    charge(): void {
+        console.log("Laptop charging.");
+    }
+
+    connectToInternet(): void {
+        console.log("Laptop connected to the internet.");
+    }
+}
+
+class Microwave2 extends Switchable {
+    turnOn(): void {
+        console.log("Microwave turned on");
+    }
+
+    turnOff(): void {
+        console.log("Microwave turned off");
+    }
+}
+
+const laptop2 = new AdvancedLaptop();
+laptop2.charge();
+laptop2.connectToInternet();
+
+const microwave2 = new Microwave2();
+microwave2.turnOn();
+microwave2.turnOff();
+
+// Extra Exercise //
+class BlackAndWhitePrintable {
+    printBlackAndWhite(): void {}
+}
+
+class ColorPrintable {
+    printColor(): void {}
+}
+
+class Scannable {
+    scan(): void {}
+}
+
+class Faxable {
+    sendFax(): void {}
+}
+
+class BlackAndWhitePrinter extends BlackAndWhitePrintable {
+    printBlackAndWhite(): void {
+        console.log("Printing in black and white...");
+    }
+}
+
+class ColorPrinter extends ColorPrintable {
+    printColor(): void {
+        console.log("Printing in color...");
+    }
+}
+
+class MultiFunctionPrinter extends BlackAndWhitePrintable implements ColorPrintable, Scannable, Faxable {
+    printBlackAndWhite(): void {
+        console.log("Printing in black and white...");
+    }
+
+    printColor(): void {
+        console.log("Printing in color...");
+    }
+
+    scan(): void {
+        console.log("Scanning...");
+    }
+
+    sendFax(): void {
+        console.log("Sending fax...");
+    }
+}
+
+const blackAndWhitePrinter = new BlackAndWhitePrinter();
+blackAndWhitePrinter.printBlackAndWhite();
+
+const colorPrinter = new ColorPrinter();
+colorPrinter.printColor();
+
+const multiFunctionPrinter = new MultiFunctionPrinter();
+multiFunctionPrinter.printBlackAndWhite();
+multiFunctionPrinter.printColor();
+multiFunctionPrinter.scan();
+multiFunctionPrinter.sendFax();