implement draw line endpoint and method

API/main.py

@@ -170,6 +170,33 @@ def draw_rectangle():
 	# respond to client
 	return jsonify(response)
 
+@api.route('/line', methods=['POST'])
+@cross_origin()
+def draw_line():
+	# prepare response data
+	response = { 'success': True }
+	try:
+		global matrix
+		assert matrix is not None
+
+		# receive client data
+		data = request.form
+		# try unpacking x,y coordinates 
+		x1 = int(data.get('x1'))
+		y1 = int(data.get('y1'))
+		x2 = int(data.get('x2'))
+		y2 = int(data.get('y2'))
+
+		# call matrix method with data
+		matrix.line(x1, y1, x2, y2)
+	except Exception as e:
+		# error handling
+		print(e)
+		response['success'] = False
+
+	# respond to client
+	return jsonify(response)
+
 @api.route('/color', methods=['POST'])
 @cross_origin()
 def set_color():
@@ -289,6 +316,10 @@ class Matrix(SampleBase):
 				# set next pixel in rectangle
 				self.canvas.SetPixel(x+i, y+j, self.color.red, self.color.green, self.color.blue)
 
+	# display line from (x1,y1) to (x2,y2) in current color
+	def line(self, x1: int, y1: int, x2: int, y2: int):
+		graphics.DrawLine(self.canvas, x1, y1, x2, y2, self.color)
+
 	# set current image
 	def set_image(self, url: str):
 		_, data = url.split(',')