Merge pull request #861 from ubports/low-power

Add low power warning, resolves #27

src/devices.js

@@ -162,6 +162,8 @@ var handleBootstrapError = (err, errM, bootstrapEvent, backToFunction) => {
     bootstrapEvent.emit("user:connection-lost", backToFunction);
   } else if (err.locked) {
     bootstrapEvent.emit("user:oem-lock", backToFunction);
+  } else if (err.lowPower) {
+    bootstrapEvent.emit("user:low-power");
   } else {
     bootstrapEvent.emit("error", errM);
   }

src/fastboot.js

@@ -36,6 +36,8 @@ var handleError = (c, r, e, password, callback) => {
         e.includes("FAILED (data transfer failure (Protocol error))")
       ) {
       callback({ connectionLost: true });
+    } else if (e.includes("FAILED (remote: low power, need battery charging.)")) {
+      callback({ lowPower: true });
     } else {
       callback(true, "Fastboot: Unknown error: " + utils.hidePassword(r,password) + " " + utils.hidePassword(e,password));
     }

src/html/index.pug

@@ -39,6 +39,7 @@ html
     include modals/error
     include modals/password
     include modals/oem-lock
+    include modals/low-power
     include modals/select-device
     include modals/developer-mode
     include modals/options

src/html/modals/low-power.pug

@@ -0,0 +1,14 @@
+#low-power-modal.modal.fade(tabindex='-1', data-backdrop='static', data-keyboard='false', role='dialog')
+  .modal-dialog(role='document')
+    .modal-content
+      .modal-header
+        button.close(type='button', data-dismiss='modal', aria-label='Close')
+          span(aria-hidden='true') ×
+        h4#myModalLabel.modal-title Low Power
+      .modal-body
+        p
+          | The battery of your device is critically low. This can cause severe Problems while flashing.
+        b
+          | Please let your device charge for a while and try again.
+      .modal-footer
+        button.btn.btn-default(type='button', data-dismiss='modal', onclick="location.reload()") Try again

src/html/scripts/main.pug

@@ -58,6 +58,9 @@ script.
       modals.show("connection-lost");
       $("#btn-reconnect").click(callback);
     });
+    installEvent.on("user:low-power", (callback) => {
+      modals.show("low-power");
+    });
     installEvent.on("user:oem-lock", (callback) => {
       modals.show('oem-lock');
       $("#btn-unlock").click(() => {