Add endpoints for changing device location (#188)

Added GenericResponse struct to have a single interface that can be used to return both errors and meaningful messages where applicable, instead of generating JSON on each spot with gin.H or whatever. If you are okay with this I can later update the existing functions
Added endpoint to change the current device location by latitude and longtitude query params
Added endpoint to reset the device location to the actual one
Bubbled up an unhandled error in my own code for device location simulation

ios/simlocation/simlocation.go

@@ -162,7 +162,10 @@ func SetLocationGPX(device ios.DeviceEntry, filePath string) error {
 				pointLat := point.PointLatitude
 
 				// Set the current point location by its latitude and longitude
-				SetLocation(device, pointLat, pointLon)
+				err = SetLocation(device, pointLat, pointLon)
+				if err != nil {
+					return err
+				}
 			}
 		}
 	}

restapi/api/device_endpoints.go

@@ -1,12 +1,14 @@
 package api
 
 import (
+	"net/http"
+
 	"github.com/danielpaulus/go-ios/ios"
 	"github.com/danielpaulus/go-ios/ios/instruments"
 	"github.com/danielpaulus/go-ios/ios/screenshotr"
+	"github.com/danielpaulus/go-ios/ios/simlocation"
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
-	"net/http"
 )
 
 // Info gets device info
@@ -64,3 +66,54 @@ func Screenshot(c *gin.Context) {
 	c.Header("Content-Type", "image/png")
 	c.Data(http.StatusOK, "application/octet-stream", b)
 }
+
+// Change the current device location
+// @Summary      Change the current device location
+// @Description Change the current device location to provided latitude and longtitude
+// @Tags         general_device_specific
+// @Produce      json
+// @Param        latitude  query      string  true  "Location latitude"
+// @Param        longtitude  query      string  true  "Location longtitude"
+// @Success      200  {object}  GenericResponse
+// @Failure		 422  {object}  GenericResponse
+// @Failure		 500  {object}  GenericResponse
+// @Router       /device/{udid}/setlocation [post]
+func SetLocation(c *gin.Context) {
+	device := c.MustGet(IOS_KEY).(ios.DeviceEntry)
+	latitude := c.Query("latitude")
+	if latitude == "" {
+		c.JSON(http.StatusUnprocessableEntity, GenericResponse{Error: "latitude query param is missing"})
+		return
+	}
+
+	longtitude := c.Query("longtitude")
+	if longtitude == "" {
+		c.JSON(http.StatusUnprocessableEntity, GenericResponse{Error: "longtitude query param is missing"})
+		return
+	}
+
+	err := simlocation.SetLocation(device, latitude, longtitude)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, GenericResponse{Error: err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, GenericResponse{Message: "Device location set to latitude=" + latitude + ", longtitude=" + longtitude})
+}
+
+// Reset to the actual device location
+// @Summary      Reset the changed device location
+// @Description  Reset the changed device location to the actual one
+// @Tags         general_device_specific
+// @Produce      json
+// @Success      200
+// @Failure      500  {object}  GenericResponse
+// @Router       /device/{udid}/resetlocation [post]
+func ResetLocation(c *gin.Context) {
+	device := c.MustGet(IOS_KEY).(ios.DeviceEntry)
+	err := simlocation.ResetLocation(device)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, GenericResponse{Error: err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, GenericResponse{Message: "Device location reset"})
+}

restapi/api/routes.go

@@ -8,6 +8,8 @@ func registerRoutes(router *gin.RouterGroup) {
 	device.Use(DeviceMiddleware())
 	device.GET("/info", Info)
 	device.GET("/screenshot", Screenshot)
+	device.PUT("/setlocation", SetLocation)
+	device.POST("/resetlocation", ResetLocation)
 
 	initAppRoutes(device)
 	initStreamingResponseRoutes(device, router)

restapi/api/util.go

@@ -3,15 +3,21 @@ package api
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/gin-gonic/gin"
-	"github.com/sirupsen/logrus"
 	"io/ioutil"
 	"math"
 	"net/http"
 	"os"
 	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
 )
 
+type GenericResponse struct {
+	Message string `json:"message,omitempty"`
+	Error   string `json:"error,omitempty"`
+}
+
 //GetVersion reads the contents of the file version.txt and returns it.
 //If the file cannot be read, it returns "could not read version"
 func GetVersion() string {