chore: implement Parser.parse

compose_viz/parser.py

@@ -1,5 +1,7 @@
+from re import S
 from compose_viz.compose import Compose
-
+from compose_viz.compose import Service
+import yaml
 
 class Parser:
     def __init__(self):
@@ -7,5 +9,36 @@ class Parser:
 
     def parse(self, file_path: str) -> Compose:
         # validate input file using `docker-compose config -q sys.argv[1]` first
-        return Compose([])
-        raise NotImplementedError
+        # load the yaml file
+        with open(file_path, "r") as f:
+            try:
+                yaml_data = yaml.safe_load(f)
+            except yaml.YAMLError as exc:
+                raise yaml.YAMLError
+        # validate the yaml file
+        if not yaml_data:
+            print("Error: empty yaml file")
+            raise ValueError
+        if not yaml_data.get("services"):
+            print("Error: no services found")
+            raise ValueError
+        # parse services data into Service objects
+        services_data = yaml_data["services"]
+        services = []
+        for service, service_name in zip(services_data.values(), services_data.keys()):
+            #print("name: {}".format(service_name))
+            if service.get("image"):
+                service_image = service["image"]
+                #print("image: {}".format(service_image))
+            if service.get("networks"):
+                service_networks = service["networks"]
+                #print("networks: {}".format(service_networks))
+            services.append(Service(
+                name=service_name,
+                image=service_image,
+                networks=service_networks,
+            ))
+        # create Compose object
+        compose = Compose(services)
+
+        return compose