add function to bind any location to a message object

cmdline/cmdline.c

@@ -449,6 +449,7 @@ char* dc_cmdline(dc_context_t* context, const char* cmdline)
 				"send <text>\n"
 				"sendimage <file> [<text>]\n"
 				"sendfile <file>\n"
+				"sendpoi <lat> <lang> <text>\n"
 				"draft [<text>]\n"
 				"listmedia\n"
 				"archive <chat-id>\n"
@@ -1035,6 +1036,31 @@ char* dc_cmdline(dc_context_t* context, const char* cmdline)
 			ret = dc_strdup("No chat selected.");
 		}
 	}
+	else if (strcmp(cmd, "sendpoi")==0)
+	{
+		if (sel_chat) {
+			char* arg2 = arg1? strchr(arg1, ' ') : NULL;
+			if (arg2) { *arg2 = 0; arg2++; }
+
+			char* arg3 = arg2? strchr(arg2, ' ') : NULL;
+			if (arg3) { *arg3 = 0; arg3++; }
+
+			if (arg1 && arg2 && arg3) {
+				dc_msg_t* msg = dc_msg_new(context,DC_MSG_TEXT);
+				dc_msg_set_text(msg, arg3);
+				dc_msg_set_location(msg, dc_atof(arg1), dc_atof(arg2), 2.0);
+				dc_send_msg(context, dc_chat_get_id(sel_chat), msg);
+				dc_msg_unref(msg);
+				ret = COMMAND_SUCCEEDED;
+			}
+			else {
+				ret = dc_strdup("ERROR: Usage: sendpoi <lat> <lng> <text>");
+			}
+		}
+		else {
+			ret = dc_strdup("No chat selected.");
+		}
+	}
 	else if (strcmp(cmd, "listmsgs")==0)
 	{
 		if (arg1) {

src/dc_msg.c

@@ -1165,6 +1165,37 @@ void dc_msg_set_duration(dc_msg_t* msg, int duration)
 }
 
 
+/**
+ * Set any location that should be bound to the message object.
+ * The function is useful to add a marker to the map
+ * at a position different from the self-location.
+ * You should not call this function
+ * if you want to bind the current self-location to a message;
+ * this is done by dc_set_location() and dc_send_locations_to_chat().
+ *
+ * Typically results in the event #DC_EVENT_LOCATION_CHANGED with
+ * contact_id set to DC_CONTACT_ID_SELF.
+ *
+ * @memberof dc_msg_t
+ * @param context The message object.
+ * @param latitude North-south position of the location.
+ * @param longitude East-west position of the location.
+ * @param accuracy Estimated accuracy of the location, radial, in meters.
+ *     Set to 0.0 if the accuracy is not known.
+ * @return None.
+ */
+void dc_msg_set_location(dc_msg_t* msg, double latitude, double longitude, double accuracy)
+{
+	if (msg==NULL || msg->magic!=DC_MSG_MAGIC || (latitude==0.0 && longitude==0.0)) {
+		return;
+	}
+
+	dc_param_set_float(msg->param, DC_PARAM_SET_LATITUDE,  latitude);
+	dc_param_set_float(msg->param, DC_PARAM_SET_LONGITUDE, longitude);
+	dc_param_set_float(msg->param, DC_PARAM_SET_ACCURACY,  accuracy);
+}
+
+
 /**
  * Late filing information to a message.
  * In contrast to the dc_msg_set_*() functions, this function really stores the information in the database.

src/dc_param.c

@@ -304,3 +304,27 @@ void dc_param_set_int(dc_param_t* param, int key, int32_t value)
     dc_param_set(param, key, value_str);
     free(value_str);
 }
+
+
+/**
+ * Set parameter to a float.
+ *
+ * @memberof dc_param_t
+ * @param param Parameter object to modify.
+ * @param key Key of the parameter to modify, one of the DC_PARAM_* constants.
+ * @param value Value to store for key.
+ * @return None.
+ */
+void dc_param_set_float(dc_param_t* param, int key, double value)
+{
+	if (param==NULL || key==0) {
+		return;
+	}
+
+	char* value_str = dc_ftoa(value);
+	if (value_str==NULL) {
+		return;
+	}
+	dc_param_set(param, key, value_str);
+	free(value_str);
+}

src/dc_param.h

@@ -43,6 +43,9 @@ struct _dc_param
 #define DC_PARAM_CMD_ARG4          'H'  /* for msgs */
 #define DC_PARAM_ERROR             'L'  /* for msgs */
 #define DC_PARAM_PREP_FORWARDS     'P'  /* for msgs in PREPARING: space-separated list of message IDs of forwarded copies */
+#define DC_PARAM_SET_LATITUDE      'l'  /* for msgs */
+#define DC_PARAM_SET_LONGITUDE     'n'  /* for msgs */
+#define DC_PARAM_SET_ACCURACY      'y'  /* for msgs */
 
 #define DC_PARAM_SERVER_FOLDER     'Z'  /* for jobs */
 #define DC_PARAM_SERVER_UID        'z'  /* for jobs */
@@ -65,6 +68,7 @@ char*           dc_param_get            (const dc_param_t*, int key, const char*
 int32_t         dc_param_get_int        (const dc_param_t*, int key, int32_t def);
 void            dc_param_set            (dc_param_t*, int key, const char* value);
 void            dc_param_set_int        (dc_param_t*, int key, int32_t value);
+void            dc_param_set_float      (dc_param_t*, int key, double value);
 
 /* library-private */
 dc_param_t*     dc_param_new            ();

src/deltachat.h

@@ -550,6 +550,7 @@ void            dc_msg_set_text               (dc_msg_t*, const char* text);
 void            dc_msg_set_file               (dc_msg_t*, const char* file, const char* filemime);
 void            dc_msg_set_dimension          (dc_msg_t*, int width, int height);
 void            dc_msg_set_duration           (dc_msg_t*, int duration);
+void            dc_msg_set_location           (dc_msg_t*, double latitude, double longitude, double accuracy);
 void            dc_msg_latefiling_mediasize   (dc_msg_t*, int width, int height, int duration);