Merge pull request 'fix/backend/veiwpoint-nodes-and-churches' (#38) from fix/backend/veiwpoint-nodes-and-churches into main

Reviewed-on: #38

.gitea/workflows/backend_run_lint.yaml

@@ -0,0 +1,34 @@
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - backend/**
+
+name: Run linting on the backend code
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - uses: https://gitea.com/actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        apt-get update && apt-get install -y python3 python3-pip
+        pip install pipenv        
+
+    - name: Install packages
+      run: |
+        ls -la
+        # only install dev-packages
+        pipenv install --categories=dev-packages
+        pipenv run pip freeze        
+
+      working-directory: backend
+
+    - name: Run linter
+      run: pipenv run pylint src
+      working-directory: backend

.gitea/workflows/backend_run_test.yaml

@@ -0,0 +1,33 @@
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - backend/**
+
+name: Run testing on the backend code
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - uses: https://gitea.com/actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        apt-get update && apt-get install -y python3 python3-pip
+        pip install pipenv        
+
+    - name: Install packages
+      run: |
+        ls -la
+        # install all packages, including dev-packages
+        pipenv install --dev
+        pipenv run pip freeze        
+      working-directory: backend
+
+    - name: Run Tests
+      run: pipenv run pytest src
+      working-directory: backend

.vscode/launch.json

@@ -14,9 +14,9 @@
                 "DEBUG": "true"
             },
             "args": [
-                "--app-dir",
+                // "--app-dir",
-                "src",
+                // "src",
-                "main:app",
+                "src.main:app",
                 "--reload",
             ],
             "jinja": true,

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "cmake.ignoreCMakeListsMissing": true
+}

backend/.pylintrc

@@ -0,0 +1,2 @@
+[MAIN]
+max-line-length=240

backend/Pipfile

@@ -4,6 +4,11 @@ verify_ssl = true
 name = "pypi"
 
 [dev-packages]
+pylint = "*"
+pytest = "*"
+tomli = "*"
+httpx = "*"
+exceptiongroup = "*"
 
 [packages]
 numpy = "*"

backend/README.md

@@ -1,12 +1,37 @@
 # Backend
 
-This repository contains the backend code for the application. It utilizes FastAPI that allows to quickly create a RESTful API that exposes the endpoints of the route optimizer.
+This repository contains the backend code for the application. It utilizes **FastAPI** to quickly create a RESTful API that exposes the endpoints of the route optimizer.
-
 
 ## Getting Started
-- The code of the python application is located in the `src` directory.
+
-- Package management is handled with `pipenv` and the dependencies are listed in the `Pipfile`.
+### Directory Structure
-- Since the application is aimed to be deployed in a container, the `Dockerfile` is provided to build the image.
+- The code for the Python application is located in the `src` directory.
+- Package management is handled with **pipenv**, and the dependencies are listed in the `Pipfile`.
+- Since the application is designed to be deployed in a container, the `Dockerfile` is provided to build the image.
+
+### Setting Up the Development Environment
+
+To set up your development environment using **pipenv**, follow these steps:
+
+1. Install `pipenv` by running:
+    ```bash
+    sudo apt install pipenv
+    ```
+
+2. Create and activate a virtual environment:
+    ```bash
+    pipenv shell
+    ```
+
+3. Install the dependencies listed in the `Pipfile`:
+    ```bash
+    pipenv install
+    ```
+
+4. The virtual environment will be created under:
+    ```bash
+    ~/.local/share/virtualenvs/...
+    ```
 
 ### Deployment
 To deploy the backend docker container, we use kubernetes. Modifications to the backend are automatically pushed to a two-stage environment through the CI pipeline. See [deployment/README](deployment/README.md] for further information.

backend/src/main.py

@@ -1,14 +1,14 @@
 import logging
 from fastapi import FastAPI, Query, Body, HTTPException
 
-from structs.landmark import Landmark
+from .structs.landmark import Landmark
-from structs.preferences import Preferences
+from .structs.preferences import Preferences
-from structs.linked_landmarks import LinkedLandmarks
+from .structs.linked_landmarks import LinkedLandmarks
-from structs.trip import Trip
+from .structs.trip import Trip
-from utils.landmarks_manager import LandmarkManager
+from .utils.landmarks_manager import LandmarkManager
-from utils.optimizer import Optimizer
+from .utils.optimizer import Optimizer
-from utils.refiner import Refiner
+from .utils.refiner import Refiner
-from persistence import client as cache_client
+from .persistence import client as cache_client
 
 
 logger = logging.getLogger(__name__)

backend/src/parameters/amenity_selectors.yaml

@@ -45,7 +45,6 @@ sightseeing:
     - gallery
     - artwork
     - aquarium
-
   historic: ''
   amenity:
     - planetarium

backend/src/parameters/landmark_parameters.yaml

@@ -1,11 +1,12 @@
 city_bbox_side: 7500 #m
 radius_close_to: 50
-church_coeff: 0.5
+church_coeff: 0.9
 nature_coeff: 1.25
 overall_coeff: 10
 tag_exponent: 1.15
 image_bonus: 10
 viewpoint_bonus: 15
-wikipedia_bonus: 6
+wikipedia_bonus: 4
+name_bonus: 3
 N_important: 40
 pay_bonus: -1

backend/src/parameters/optimizer_parameters.yaml

@@ -3,4 +3,4 @@ detour_corridor_width: 300
 average_walking_speed: 4.8
 max_landmarks: 10
 max_landmarks_refiner: 30
-overshoot: 1.8
+overshoot: 1.15

backend/src/persistence.py

@@ -1,7 +1,6 @@
 from pymemcache.client.base import Client
-from pymemcache import serde
 
-import constants
+from .constants import MEMCACHED_HOST_PATH
 
 
 class DummyClient:
@@ -16,13 +15,12 @@ class DummyClient:
         return self._data[key]
 
 
-if constants.MEMCACHED_HOST_PATH is None:
+if MEMCACHED_HOST_PATH is None:
     client = DummyClient()
 else:
     client = Client(
-        constants.MEMCACHED_HOST_PATH,
+        MEMCACHED_HOST_PATH,
-        timeout = 1,
+        timeout=1,
-        allow_unicode_keys = True,
+        allow_unicode_keys=True,
-        encoding = 'utf-8',
+        encoding='utf-8'
-        serde = serde.pickle_serde
     )

backend/src/structs/linked_landmarks.py

@@ -1,5 +1,5 @@
 from .landmark import Landmark
-from utils.get_time_separation import get_time
+from ..utils.get_time_separation import get_time
 
 class LinkedLandmarks:
     """
@@ -35,6 +35,7 @@ class LinkedLandmarks:
             time_to_next = get_time(landmark.location, self._landmarks[i + 1].location)
             landmark.time_to_reach_next = time_to_next
             self.total_time += time_to_next
+            self.total_time += landmark.duration
 
         self._landmarks[-1].next_uuid = None
         self._landmarks[-1].time_to_reach_next = 0

backend/src/tester.py

@@ -1,12 +1,12 @@
 import logging
 import yaml
 
-from utils.landmarks_manager import LandmarkManager
+from .utils.landmarks_manager import LandmarkManager
-from utils.optimizer import Optimizer
+from .utils.optimizer import Optimizer
-from utils.refiner import Refiner
+from .utils.refiner import Refiner
-from structs.landmark import Landmark
+from .structs.landmark import Landmark
-from structs.linked_landmarks import LinkedLandmarks
+from .structs.linked_landmarks import LinkedLandmarks
-from structs.preferences import Preferences, Preference
+from .structs.preferences import Preferences, Preference
 
 
 logger = logging.getLogger(__name__)
@@ -22,8 +22,8 @@ def test(start_coords: tuple[float, float], finish_coords: tuple[float, float] =
     preferences = Preferences(
         sightseeing=Preference(type='sightseeing', score = 5),
         nature=Preference(type='nature', score = 5),
-        shopping=Preference(type='shopping', score = 5),
+        shopping=Preference(type='shopping', score = 0),
-        max_time_minute=100,
+        max_time_minute=30,
         detour_tolerance_minute=0
     )
 
@@ -74,6 +74,7 @@ def test(start_coords: tuple[float, float], finish_coords: tuple[float, float] =
 # test(tuple((48.8344400, 2.3220540)))       # Café Chez César 
 # test(tuple((48.8375946, 2.2949904)))       # Point random
 # test(tuple((47.377859, 8.540585)))         # Zurich HB
-# test(tuple((45.758217, 4.831814)))      # Lyon Bellecour
+test(tuple((45.758217, 4.831814)))         # Lyon Bellecour
-test(tuple((48.5848435, 7.7332974)))      # Strasbourg Gare
+# test(tuple((48.5848435, 7.7332974)))       # Strasbourg Gare
 # test(tuple((48.2067858, 16.3692340)))      # Vienne
+# test(tuple((48.2432090, 7.3892691)))         # Orschwiller 

backend/src/tests/test_main.py

@@ -0,0 +1,141 @@
+from fastapi.testclient import TestClient
+from typing import List
+import pytest
+from ..main import app
+from ..structs.landmark import Landmark
+
+
+@pytest.fixture()
+def client():
+    return TestClient(app)
+
+
+# Base test for checking if the API returns correct error code when no preferences are specified.
+def test_new_trip_invalid_prefs(client):
+    response = client.post(
+        "/trip/new",
+        json={
+            "preferences": {},
+            "start": [48.8566, 2.3522]
+            }
+        )
+    assert response.status_code == 422
+
+    
+# Test no. 1
+def test_turckheim(client):
+    duration_minutes = 15
+    response = client.post(
+        "/trip/new",
+        json={
+            "preferences": {"sightseeing": {"type": "sightseeing", "score": 5}, "nature": {"type": "nature", "score": 5}, "shopping": {"type": "shopping", "score": 5}, "max_time_minute": duration_minutes, "detour_tolerance_minute": 0},
+            "start": [48.084588, 7.280405]
+            }
+        )
+    result = response.json()
+    landmarks = load_trip_landmarks(client, result['first_landmark_uuid'])
+
+    # checks :
+    assert response.status_code == 200  # check for successful planning
+    assert isinstance(landmarks, list)  # check that the return type is a list
+    assert duration_minutes*0.8 < int(result['total_time']) < duration_minutes*1.2
+    assert len(landmarks) > 2           # check that there is something to visit
+
+
+# Test no. 2
+def test_bellecour(client) :
+    duration_minutes = 35
+    response = client.post(
+        "/trip/new",
+        json={
+            "preferences": {"sightseeing": {"type": "sightseeing", "score": 5}, "nature": {"type": "nature", "score": 5}, "shopping": {"type": "shopping", "score": 5}, "max_time_minute": duration_minutes, "detour_tolerance_minute": 0},
+            "start": [45.7576485, 4.8330241]
+            }
+        )
+    result = response.json()
+    landmarks = load_trip_landmarks(client, result['first_landmark_uuid'])
+    osm_ids = landmarks_to_osmid(landmarks)
+
+    # checks :
+    assert response.status_code == 200  # check for successful planning
+    assert duration_minutes*0.8 < int(result['total_time']) < duration_minutes*1.2
+    assert 136200148 in osm_ids         # check for Cathédrale St. Jean in trip
+
+
+
+def landmarks_to_osmid(landmarks: List[Landmark]) -> list :
+    """
+    Convert the list of landmarks into a list containing their osm ids for quick landmark checking.
+    
+    Args :
+        landmarks (list): the list of landmarks
+    
+    Returns :
+        ids (list)      : the list of corresponding OSM ids
+    """
+    ids = []
+    for landmark in landmarks :
+        ids.append(landmark.osm_id)
+
+    return ids
+
+def fetch_landmark(client, landmark_uuid):
+    """
+    Fetch landmark data from the API based on the landmark UUID.
+
+    Args:
+        landmark_uuid (str): The UUID of the landmark.
+
+    Returns:
+        dict: Landmark data fetched from the API.
+    """
+    response = client.get(f"/landmark/{landmark_uuid}")
+
+    if response.status_code != 200:
+        raise Exception(f"Failed to fetch landmark with UUID {landmark_uuid}: {response.status_code}")
+    
+    json_data = response.json()
+    
+    if "detail" in json_data:
+        raise Exception(json_data["detail"])
+    
+    return json_data
+
+
+def load_trip_landmarks(client, first_uuid):
+    """
+    Load all landmarks for a trip using the response from the API.
+
+    Args:
+        first_uuid (str) : The first UUID of the landmark.
+
+    Returns:
+        landmarks (list) : An list containing all landmarks for the trip.
+    """
+    landmarks = []
+    next_uuid = first_uuid
+
+    while next_uuid is not None:
+        landmark_data = fetch_landmark(client, next_uuid)
+        landmarks.append(Landmark(**landmark_data)) # Create Landmark objects
+        next_uuid = landmark_data.get('next_uuid')  # Prepare for the next iteration
+
+    return landmarks
+
+
+
+
+# def test_new_trip_single_prefs(client):
+#     response = client.post(
+#         "/trip/new",
+#         json={
+#             "preferences": {"sightseeing": {"type": "sightseeing", "score": 1}, "nature": {"type": "nature", "score": 1}, "shopping": {"type": "shopping", "score": 1}, "max_time_minute": 360, "detour_tolerance_minute": 0},
+#             "start": [48.8566, 2.3522]
+#             }
+#         )
+#     assert response.status_code == 200
+
+
+# def test_new_trip_matches_prefs(client):
+#     # todo
+#     pass

backend/src/utils/get_time_separation.py

@@ -1,9 +1,9 @@
 import yaml
 from math import sin, cos, sqrt, atan2, radians
 
-import constants
+from ..constants import OPTIMIZER_PARAMETERS_PATH
 
-with constants.OPTIMIZER_PARAMETERS_PATH.open('r') as f:
+with OPTIMIZER_PARAMETERS_PATH.open('r') as f:
     parameters = yaml.safe_load(f)
     DETOUR_FACTOR = parameters['detour_factor']
     AVERAGE_WALKING_SPEED = parameters['average_walking_speed']

backend/src/utils/landmarks_manager.py

@@ -5,10 +5,11 @@ import logging
 from OSMPythonTools.overpass import Overpass, overpassQueryBuilder
 from OSMPythonTools.cachingStrategy import CachingStrategy, JSON
 
-from structs.preferences import Preferences
+from ..structs.preferences import Preferences
-from structs.landmark import Landmark
+from ..structs.landmark import Landmark
 from .take_most_important import take_most_important
-import constants
+
+from ..constants import AMENITY_SELECTORS_PATH, LANDMARK_PARAMETERS_PATH, OPTIMIZER_PARAMETERS_PATH, OSM_CACHE_DIR
 
 # silence the overpass logger
 logging.getLogger('OSMPythonTools').setLevel(level=logging.CRITICAL)
@@ -27,10 +28,10 @@ class LandmarkManager:
 
     def __init__(self) -> None:
 
-        with constants.AMENITY_SELECTORS_PATH.open('r') as f:
+        with AMENITY_SELECTORS_PATH.open('r') as f:
             self.amenity_selectors = yaml.safe_load(f)
 
-        with constants.LANDMARK_PARAMETERS_PATH.open('r') as f:
+        with LANDMARK_PARAMETERS_PATH.open('r') as f:
             parameters = yaml.safe_load(f)
             self.max_bbox_side = parameters['city_bbox_side']
             self.radius_close_to = parameters['radius_close_to']
@@ -39,18 +40,19 @@ class LandmarkManager:
             self.overall_coeff = parameters['overall_coeff']
             self.tag_exponent = parameters['tag_exponent']
             self.image_bonus = parameters['image_bonus']
+            self.name_bonus = parameters['name_bonus']
             self.wikipedia_bonus = parameters['wikipedia_bonus']
             self.viewpoint_bonus = parameters['viewpoint_bonus']
             self.pay_bonus = parameters['pay_bonus']
             self.N_important = parameters['N_important']
 
-        with constants.OPTIMIZER_PARAMETERS_PATH.open('r') as f:
+        with OPTIMIZER_PARAMETERS_PATH.open('r') as f:
             parameters = yaml.safe_load(f)
             self.walking_speed = parameters['average_walking_speed']
             self.detour_factor = parameters['detour_factor']
 
         self.overpass = Overpass()
-        CachingStrategy.use(JSON, cacheDir=constants.OSM_CACHE_DIR)
+        CachingStrategy.use(JSON, cacheDir=OSM_CACHE_DIR)
 
 
     def generate_landmarks_list(self, center_coordinates: tuple[float, float], preferences: Preferences) -> tuple[list[Landmark], list[Landmark]]:
@@ -94,6 +96,8 @@ class LandmarkManager:
         if preferences.shopping.score != 0:
             score_function = lambda score: score * 10 * preferences.shopping.score / 5
             current_landmarks = self.fetch_landmarks(bbox, self.amenity_selectors['shopping'], preferences.shopping.type, score_function)
+            # set time for all shopping activites :
+            for landmark in current_landmarks : landmark.duration = 45
             all_landmarks.update(current_landmarks)
 
 
@@ -200,18 +204,29 @@ class LandmarkManager:
         """
         return_list = []
 
+        if landmarktype == 'nature' : query_conditions = []
+        else : query_conditions = ['count_tags()>5']
+
         # caution, when applying a list of selectors, overpass will search for elements that match ALL selectors simultaneously
         # we need to split the selectors into separate queries and merge the results
         for sel in dict_to_selector_list(amenity_selector):
             self.logger.debug(f"Current selector: {sel}")
+
+            query_conditions = ['count_tags()>5']
+            element_types = ['way', 'relation']
+
+            if 'viewpoint' in sel :
+                query_conditions = []
+                element_types.append('node')
+
             query = overpassQueryBuilder(
                 bbox = bbox,
-                elementType = ['way', 'relation'],
+                elementType = element_types,
                 # selector can in principle be a list already,
                 # but it generates the intersection of the queries
                 # we want the union
                 selector = sel,
-                conditions = ['count_tags()>5'],
+                conditions = query_conditions,        # except for nature....
                 includeCenter = True,
                 out = 'body'
                 )
@@ -227,18 +242,23 @@ class LandmarkManager:
 
                 name = elem.tag('name')
                 location = (elem.centerLat(), elem.centerLon())
+                osm_type = elem.type()              # Add type: 'way' or 'relation'
+                osm_id = elem.id()                  # Add OSM id 
 
                 # TODO: exclude these from the get go
-                # skip if unprecise location
+                # handle unprecise and no-name locations
                 if name is None or location[0] is None:
-                    continue
+                    if osm_type == 'node' and 'viewpoint' in elem.tags().values(): 
+                        name = 'Viewpoint'
+                        name_en = 'Viewpoint'
+                        location = (elem.lat(), elem.lon())
+                    else : 
+                        continue
 
                 # skip if part of another building
                 if 'building:part' in elem.tags().keys() and elem.tag('building:part') == 'yes':
                     continue
             
-                osm_type = elem.type()              # Add type: 'way' or 'relation'
-                osm_id = elem.id()                  # Add OSM id 
                 elem_type = landmarktype            # Add the landmark type as 'sightseeing, 
                 n_tags = len(elem.tags().keys())    # Add number of tags
                 score = n_tags**self.tag_exponent   # Add score
@@ -246,59 +266,68 @@ class LandmarkManager:
                 image_url = None
                 name_en = None
 
-                # remove specific tags
+                # Adjust scoring, browse through tag keys
                 skip = False
-                for tag in elem.tags().keys():
+                for tag_key in elem.tags().keys():
-                    if "pay" in tag:
+                    if "pay" in tag_key:
-                        # payment options are a good sign
+                        # payment options are misleading and should not count for the scoring.
                         score += self.pay_bonus
 
-                    if "disused" in tag:
+                    if "disused" in tag_key:
                         # skip disused amenities
                         skip = True
                         break
 
-                    if "wiki" in tag:
+                    if "name" in tag_key :
+                        score += self.name_bonus
+
+                    if "wiki" in tag_key:
                         # wikipedia entries count more
                         score += self.wikipedia_bonus
 
-                    if "viewpoint" in tag:
+                    if "image" in tag_key:
-                        score += self.viewpoint_bonus
+                        # images must count more
-                        duration = 10
-
-                    if "image" in tag:
                         score += self.image_bonus
 
                     if elem_type != "nature":
-                        if "leisure" in tag and elem.tag('leisure') == "park":
+                        if "leisure" in tag_key and elem.tag('leisure') == "park":
                             elem_type = "nature"
 
                     if landmarktype != "shopping":
-                        if "shop" in tag:
+                        if "shop" in tag_key:
                             skip = True
                             break
 
-                        if tag == "building" and elem.tag('building') in ['retail', 'supermarket', 'parking']:
+                        if tag_key == "building" and elem.tag('building') in ['retail', 'supermarket', 'parking']:
                             skip = True
                             break
 
-                    if tag in ['website', 'contact:website']:
+                    # Extract image, website and english name
-                        website_url = elem.tag(tag)
+                    if tag_key in ['website', 'contact:website']:
-                    if tag == 'image':
+                        website_url = elem.tag(tag_key)
+                    if tag_key == 'image':
                         image_url = elem.tag('image')
-                    if tag =='name:en':
+                    if tag_key =='name:en':
                         name_en = elem.tag('name:en')
 
                 if skip:
                     continue
 
+                # Don't visit random apartments
+                if 'apartments' in elem.tags().values():
+                    continue
+
                 score = score_function(score)
                 if "place_of_worship" in elem.tags().values():
                     score = score * self.church_coeff
-                    duration = 15
+                    duration = 10
 
-                elif "museum" in elem.tags().values():
+                if 'viewpoint' in elem.tags().values() :
-                    score = score * self.church_coeff
+                    # viewpoints must count more
+                    score += self.viewpoint_bonus
+                    duration = 10
+                
+                elif "museum" in elem.tags().values() or "aquarium" in elem.tags().values() or "planetarium" in elem.tags().values():
                     duration = 60
                 
                 else:

backend/src/utils/optimizer.py

@@ -4,9 +4,9 @@ import numpy as np
 from scipy.optimize import linprog
 from collections import defaultdict, deque
 
-from structs.landmark import Landmark
+from ..structs.landmark import Landmark
 from .get_time_separation import get_time
-import constants
+from ..constants import OPTIMIZER_PARAMETERS_PATH
 
     
 
@@ -26,7 +26,7 @@ class Optimizer:
     def __init__(self) :
 
         # load parameters from file
-        with constants.OPTIMIZER_PARAMETERS_PATH.open('r') as f:
+        with OPTIMIZER_PARAMETERS_PATH.open('r') as f:
             parameters = yaml.safe_load(f)
             self.detour_factor = parameters['detour_factor']
             self.average_walking_speed = parameters['average_walking_speed']
@@ -487,7 +487,7 @@ class Optimizer:
 
         # Raise error if no solution is found
         if not res.success :
-            raise ArithmeticError("No solution could be found, the problem is overconstrained. Please adapt your must_dos")
+            raise ArithmeticError("No solution could be found, the problem is overconstrained. Try with a longer trip (>30 minutes).")
 
         # If there is a solution, we're good to go, just check for connectiveness
         order, circles = self.is_connected(res.x)

backend/src/utils/refiner.py

@@ -2,11 +2,12 @@ import yaml, logging
 
 from shapely import buffer, LineString, Point, Polygon, MultiPoint, concave_hull
 from math import pi
+from typing import List
 
-from structs.landmark import Landmark
+from ..structs.landmark import Landmark
 from . import take_most_important, get_time_separation
 from .optimizer import Optimizer
-import constants
+from ..constants import OPTIMIZER_PARAMETERS_PATH
 
 
 
@@ -24,7 +25,7 @@ class Refiner :
         self.optimizer = optimizer
 
         # load parameters from file
-        with constants.OPTIMIZER_PARAMETERS_PATH.open('r') as f:
+        with OPTIMIZER_PARAMETERS_PATH.open('r') as f:
             parameters = yaml.safe_load(f)
             self.detour_factor = parameters['detour_factor']
             self.detour_corridor_width = parameters['detour_corridor_width']
@@ -134,6 +135,21 @@ class Refiner :
     
         return tour
     
+    def integrate_landmarks(self, sub_list: List[Landmark], main_list: List[Landmark]) :
+        """
+        Inserts 'sub_list' of Landmarks inside the 'main_list' by leaving the ends untouched.
+        
+        Args: 
+            sub_list    : the list of Landmarks to be inserted inside of the 'main_list'.
+            main_list   : the original list with start and finish.
+
+        Returns:
+            the full list.
+        """
+        sub_list.append(main_list[-1])          # add finish back
+        return main_list[:-1] + sub_list        # create full set of possible landmarks
+
+
 
     def find_shortest_path_through_all_landmarks(self, landmarks: list[Landmark]) -> tuple[list[Landmark], Polygon]:
         """
@@ -253,6 +269,11 @@ class Refiner :
         except :
             better_tour_poly = concave_hull(MultiPoint(coords))  # Create concave hull with "core" of tour leaving out start and finish
             xs, ys = better_tour_poly.exterior.xy
+            """ 
+            ERROR HERE : 
+                Exception has occurred: AttributeError
+                'LineString' object has no attribute 'exterior'
+            """
 
 
         # reverse the xs and ys
@@ -315,26 +336,30 @@ class Refiner :
 
         self.logger.info(f"Using {len(minor_landmarks)} minor landmarks around the predicted path")
 
-        # full set of visitable landmarks
+        # Full set of visitable landmarks.
-        full_set = base_tour[:-1] + minor_landmarks   # create full set of possible landmarks (without finish)
+        full_set = self.integrate_landmarks(minor_landmarks, base_tour)     # could probably be optimized with less overhead
-        full_set.append(base_tour[-1])                # add finish back
 
-        # get a new tour
+        # Generate a new tour with the optimizer.
         new_tour = self.optimizer.solve_optimization(
             max_time = max_time + detour,
             landmarks = full_set, 
             max_landmarks = self.max_landmarks_refiner
         )
 
+        # If unsuccessful optimization, use the base_tour.
         if new_tour is None:
             self.logger.warning("No solution found for the refined tour. Returning the initial tour.")
             new_tour = base_tour
 
+        # If only one landmark, return it.
+        if len(new_tour) < 4 :
+            return new_tour
 
-        # Find shortest path using the nearest neighbor heuristic
+        # Find shortest path using the nearest neighbor heuristic.
         better_tour, better_poly = self.find_shortest_path_through_all_landmarks(new_tour)
 
-        # Fix the tour using Polygons if the path looks weird
+        # Fix the tour using Polygons if the path looks weird. 
+        # Conditions : circular trip and invalid polygon.
         if base_tour[0].location == base_tour[-1].location and not better_poly.is_valid :
             better_tour = self.fix_using_polygon(better_tour)
 

backend/src/utils/take_most_important.py

@@ -1,4 +1,4 @@
-from structs.landmark import Landmark
+from ..structs.landmark import Landmark
 
 def take_most_important(landmarks: list[Landmark], n_important) -> list[Landmark]:
     """

frontend/.github/workflows/build_app_android.yaml

@@ -37,7 +37,7 @@ jobs:
           REF_NAME: ${{ github.ref_name }}
         run:
           # remove the 'v' prefix from the tag name
-          echo "VERSION_NAME=${REF_NAME//v}" >> $GITHUB_ENV
+          echo "BUILD_NAME=${REF_NAME//v}" >> $GITHUB_ENV
 
       - name: Load secrets from github
         run: |
@@ -53,4 +53,6 @@ jobs:
       - name: Run fastlane lane
         run: bundle exec fastlane deploy_testing
         working-directory: android
-        # the environment variable VERSION_NAME is implicitly available
+        env:
+          BUILD_NUMBER: ${{ github.run_number }}
+          # BUILD_NAME is implicitly available

frontend/android/fastlane/Fastfile

@@ -5,16 +5,18 @@ default_platform(:android)
 
 platform :android do
 
-  desc "Deploy a new version as a preview version"
+  desc "Deploy a new version to closed testing"
   lane :deploy_testing do
-    version_name = ENV["VERSION_NAME"]
+    build_name = ENV["BUILD_NAME"]
+    build_number = ENV["BUILD_NUMBER"]
 
     sh(
       "flutter",
       "build",
       "appbundle",
       "--release",
-      "--build-name=#{version_name}",
+      "--build-name=#{build_name}",
+      "--build-number=#{build_number}",
       )
     
     upload_to_play_store(
@@ -32,6 +34,7 @@ platform :android do
   lane :deploy_release do
     gradle(
       task: "clean assembleRelease",
+      # todo update to a flutter call
       properties: {
         # loaded from environment
         "android.injected.version.name" => ENV["VERSION_NAME"],