C22 Izzy Hirad, Christelle Nkera , Marjana Khatun

app/__init__.py

@@ -1,7 +1,10 @@
 from flask import Flask
+from .routes.planet_routes import planets_bp
 
 
 def create_app(test_config=None):
     app = Flask(__name__)
 
+    app.register_blueprint(planets_bp)
+
     return app

app/models/planet.py

@@ -0,0 +1,18 @@
+class Planet: 
+    def __init__(self, id, name, description): 
+        self.id = id
+        self.name = name
+        self.description = description 
+
+    def to_dict(self):
+        return dict(
+            id=self.id,
+            name=self.name,
+            description=self.description
+        )
+
+planets = [
+    Planet(1, "Mars", "The red planet"),
+    Planet(2, "Earth", "The green planet"), 
+    Planet(3, "Jupiter", "The largest planet")
+]

app/routes/planet_routes.py

@@ -0,0 +1,30 @@
+from flask import Blueprint, abort, make_response
+from app.models.planet import planets
+
+planets_bp = Blueprint("planets_bp", __name__, url_prefix="/planets")
+
+@planets_bp.get("")
+def get_all_planets():
+    planets_response = []
+    for planet in planets: 
+        planets_response.append(planet.to_dict())   
+    return planets_response
+
+@planets_bp.get("/<planet_id>")
+def get_one_planet(planet_id):
+    planet = validate_planet(planet_id)
+    return planet.to_dict(), 200
+
+def validate_planet(planet_id):
+    try:
+        planet_id = int(planet_id)
+    except ValueError: 
+        abort(make_response({"message":f"Planet id {planet_id} is invalid"}, 400))
+
+    for planet in planets:
+        if planet.id == planet_id:
+            return planet
+
+    abort(make_response({"message":f"Planet id {planet_id} is not found"}, 404))
+
+