Add load model config

setup.py

@@ -23,7 +23,12 @@
         "Topic :: Software Development :: Libraries",
     ],
     include_package_data=True,
-    install_requires=["scipy", "numpy"],
+    install_requires=["scipy", "numpy", "dacite"],
     python_requires=">=3.8",
-    tests_require=["pytest"],
+    extras_require={
+        "dev": [
+            "pytest",
+            "black",
+        ]
+    },
 )

src/alitra/models/map_config.py

@@ -1,4 +1,8 @@
+import json
 from dataclasses import dataclass
+from pathlib import Path
+
+from dacite import from_dict
 
 from alitra.frame_dataclasses import PointList
 
@@ -8,3 +12,13 @@ class MapConfig:
     map_name: str
     robot_reference_points: PointList
     asset_reference_points: PointList
+
+
+def load_map_config(map_config_path: Path) -> MapConfig:
+    with open(map_config_path) as json_file:
+        map_config_dict = json.load(json_file)
+
+    return from_dict(
+        data_class=MapConfig,
+        data=map_config_dict,
+    )

tests/models/test_map_config.py

@@ -0,0 +1,38 @@
+from pathlib import Path
+
+import pytest
+
+from alitra.frame_dataclasses import Point, PointList
+from alitra.models.map_config import MapConfig, load_map_config
+
+expected_map_config = MapConfig(
+    map_name="test_map",
+    robot_reference_points=PointList(
+        points=[
+            Point(x=10, y=20, z=30, frame="robot"),
+            Point(x=40, y=50, z=60, frame="robot"),
+            Point(x=70, y=80, z=90, frame="robot"),
+        ],
+        frame="robot",
+    ),
+    asset_reference_points=PointList(
+        points=[
+            Point(x=11, y=21, z=31, frame="asset"),
+            Point(x=41, y=51, z=61, frame="asset"),
+            Point(x=71, y=81, z=91, frame="asset"),
+        ],
+        frame="asset",
+    ),
+)
+
+
+def test_load_map_config():
+    map_config_path = Path("./tests/test_data/test_map_config/test_map_config.json")
+    map_config: MapConfig = load_map_config(map_config_path)
+    assert map_config == expected_map_config
+
+
+def test_invalid_file_path():
+    map_config_path = Path("./tests/test_data/test_map_config/no_file.json")
+    with pytest.raises(Exception):
+        load_map_config(map_config_path)

tests/test_data/test_map_config/test_map_config.json

@@ -0,0 +1,49 @@
+{
+  "map_name": "test_map",
+  "robot_reference_points": {
+    "points": [
+      {
+        "x": 10,
+        "y": 20,
+        "z": 30,
+        "frame": "robot"
+      },
+      {
+        "x": 40,
+        "y": 50,
+        "z": 60,
+        "frame": "robot"
+      },
+      {
+        "x": 70,
+        "y": 80,
+        "z": 90,
+        "frame": "robot"
+      }
+    ],
+    "frame": "robot"
+  },
+  "asset_reference_points": {
+    "points": [
+      {
+        "x": 11,
+        "y": 21,
+        "z": 31,
+        "frame": "asset"
+      },
+      {
+        "x": 41,
+        "y": 51,
+        "z": 61,
+        "frame": "asset"
+      },
+      {
+        "x": 71,
+        "y": 81,
+        "z": 91,
+        "frame": "asset"
+      }
+    ],
+    "frame": "asset"
+  }
+}