JS: Add extra SDK feature strings

applications/system/js_app/examples/apps/Scripts/Examples/blebeacon.js

@@ -1,3 +1,6 @@
+// Script cannot work without blebeacon module so check before
+checkSdkFeatures(["blebeacon"]);
+
 let blebeacon = require("blebeacon");
 
 // Stop if previous background beacon is active

applications/system/js_app/examples/apps/Scripts/Examples/i2c.js

@@ -1,3 +1,6 @@
+// Script cannot work without i2c module so check before
+checkSdkFeatures(["i2c"]);
+
 // Connect an 24C32N EEPROM to the I2C bus of the board. SDA=pin 15, SCL=pin 16, VCC=pin 9, GND=pin 8.
 let i2c = require("i2c");
 

applications/system/js_app/examples/apps/Scripts/Examples/spi.js

@@ -1,3 +1,6 @@
+// Script cannot work without spi module so check before
+checkSdkFeatures(["spi"]);
+
 // Connect a w25q32 SPI device to the Flipper Zero.
 // D1=pin 2 (MOSI), SLK=pin 5 (SCK), GND=pin 8 (GND), D0=pin 3 (MISO), CS=pin 4 (CS), VCC=pin 9 (3V3)
 let spi = require("spi");

applications/system/js_app/examples/apps/Scripts/Examples/storage.js

@@ -26,4 +26,16 @@ storage.remove(path);
 print("Done")
 
 // You don't need to close the file after each operation, this is just to show some different ways to use the API
-// There's also many more functions and options, check type definitions in firmware repo
+// There's also many more functions and options, check type definitions in firmware repo
+
+// There is also virtual API, which is not available in all firmwares
+// Allows you to mount disk images (like mass storage) and read/modify their contents
+// If you want to use this as an optional feature, not essential to your script:
+// if (doesSdkSupport(["storage-virtual"])) {
+//     storage.virtualInit("/ext/disk_image.img");
+//     storage.virtualMount();
+//     // Read/modify data from /mnt filesystem
+//     storage.virtualQuit();
+// }
+// If instead virtual API is essential to your script, put this near beginning of script:
+// checkSdkFeatures(["storage-virtual"]);

applications/system/js_app/examples/apps/Scripts/Examples/subghz.js

@@ -1,3 +1,6 @@
+// Script cannot work without subghz module so check before
+checkSdkFeatures(["subghz"]);
+
 let subghz = require("subghz");
 subghz.setup();
 

applications/system/js_app/examples/apps/Scripts/Examples/usbdisk.js

@@ -1,12 +1,39 @@
+// Script cannot work without usbdisk module so check before
+checkSdkFeatures(["usbdisk"]);
+
 let usbdisk = require("usbdisk");
-// print("Creating image...");
-// usbdisk.createImage("/ext/apps_data/mass_storage/128MB.img", 128 * 1024 * 1024);
+let storage = require("storage");
+
+let imagePath = "/ext/apps_data/mass_storage/128MB.img";
+let imageSize = 128 * 1024 * 1024;
+
+let imageExisted = storage.fileExists(imagePath);
+if (imageExisted) {
+    print("Disk image '128MB' already exists");
+} else {
+    // CreateImage isn't necessary to overall function, check when its used not at script start
+    if (doesSdkSupport(["usbdisk-createimage"])) {
+        print("Creating disk image '128MB'...");
+        usbdisk.createImage(imagePath, imageSize);
+    } else {
+        die("Disk image '128MB' not present, can't auto-create");
+    }
+}
+
 print("Starting UsbDisk...");
 usbdisk.start("/ext/apps_data/mass_storage/128MB.img");
+
 print("Started, waiting until ejected...");
 while (!usbdisk.wasEjected()) {
     delay(1000);
 }
+
 print("Ejected, stopping UsbDisk...");
 usbdisk.stop();
+
+if (!imageExisted) {
+    print("Removing disk image...");
+    storage.remove(imagePath);
+}
+
 print("Done");

applications/system/js_app/examples/apps/Scripts/Examples/widget.js

@@ -1,3 +1,6 @@
+// Script cannot work without widget module so check before
+checkSdkFeatures(["widget"]);
+
 let widget = require("widget");
 
 let demo_seconds = 30;
@@ -34,8 +37,12 @@ widget.addDot(102, 44);
 widget.addDot(104, 43);
 
 // add an icon (x, y, icon)
-widget.addIcon(100, 50, "ButtonUp_7x4");
-widget.addIcon(100, 55, "ButtonDown_7x4");
+// not available in all firmwares, but not essential for this script's
+// functionality, so we just check at runtime and use it if it is available
+if (doesSdkSupport(["widget-addicon"])) {
+    widget.addIcon(100, 50, "ButtonUp_7x4");
+    widget.addIcon(100, 55, "ButtonDown_7x4");
+}
 
 // add a glyph (x, y, glyph)
 widget.addGlyph(115, 50, "#".charCodeAt(0));