Re-add watch commands to itctl

cmd/itctl/watch.go

@@ -0,0 +1,104 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/urfave/cli/v2"
+)
+
+func watchHeart(c *cli.Context) error {
+	heartCh, cancel, err := client.WatchHeartRate()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for heartRate := range heartCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(
+				map[string]uint8{"heartRate": heartRate},
+			)
+		} else if c.Bool("shell") {
+			fmt.Printf("HEART_RATE=%d\n", heartRate)
+		} else {
+			fmt.Println(heartRate, "BPM")
+		}
+	}
+
+	return nil
+}
+
+func watchBattLevel(c *cli.Context) error {
+	battLevelCh, cancel, err := client.WatchBatteryLevel()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for battLevel := range battLevelCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(
+				map[string]uint8{"battLevel": battLevel},
+			)
+		} else if c.Bool("shell") {
+			fmt.Printf("BATTERY_LEVEL=%d\n", battLevel)
+		} else {
+			fmt.Printf("%d%%\n", battLevel)
+		}
+	}
+
+	return nil
+}
+
+func watchStepCount(c *cli.Context) error {
+	stepCountCh, cancel, err := client.WatchStepCount()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for stepCount := range stepCountCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(
+				map[string]uint32{"stepCount": stepCount},
+			)
+		} else if c.Bool("shell") {
+			fmt.Printf("STEP_COUNT=%d\n", stepCount)
+		} else {
+			fmt.Println(stepCount, "Steps")
+		}
+	}
+
+	return nil
+}
+
+func watchMotion(c *cli.Context) error {
+	motionCh, cancel, err := client.WatchMotion()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for motionVals := range motionCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(motionVals)
+		} else if c.Bool("shell") {
+			fmt.Printf(
+				"X=%d\nY=%d\nZ=%d\n",
+				motionVals.X,
+				motionVals.Y,
+				motionVals.Z,
+			)
+		} else {
+			fmt.Println(motionVals)
+		}
+	}
+
+	return nil
+}