Added more APIs for the vehicle microservice and update README (#79)

## Description of changes:
Updated the Vehicle Inventory Microservice to support a bunch of new
APIs as well as a new table called VehiclePurchaseHistory that will
store date and price for a certain vehicle model. The new APIs include
some GET/POST/DELETE APIs for the Vehicle model and
VehiclePurchaseHistory model as well as an extra API that POSTs to the
image service.

## Testing
Tested all the following APIs and they are working as expected: 
1. `GET /vehicle-inventory/heatlh-check/`
2. `GET /vehicle-inventory/`
3. `POST /vehicle-inventory/`
4. `GET /vehicle-inventory/<int>`
5. `DELETE /vehicle-inventory/<int>`
6. `GET /vehicle-inventory/name/<str>`
7. `GET /vehicle-inventory/<int>/image`
8. `GET /vehicle-inventory/image/<image_name>`
9. `POST /vehicle-inventory/image/<image_name>`
10. `GET /vehicle-inventory/history/`
11. `POST /vehicle-inventory/history/`
12. `GET /vehicle-inventory/history/<int>`
13. `DELETE /vehicle-inventory/history/<int>`
14. `GET /vehicle-inventory/history/<int>/vehicle`

```
asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET  http://0.0.0.0:8001/vehicle-inventory/health-check/
Vehicle Inventory Service up and running!%  

asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET  http://0.0.0.0:8001/vehicle-inventory/             
{'id': 2, 'make': 'BMW', 'model': 'M340', 'year': 2022, 'image_name': 'newCar.jpg'}% 
                                                                                                                                  
asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET  http://0.0.0.0:8001/vehicle-inventory/1
Vehicle with id=1 is not found%                

asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET  http://0.0.0.0:8001/vehicle-inventory/2
{'id': 2, 'make': 'BMW', 'model': 'M340', 'year': 2022, 'image_name': 'newCar.jpg'}%                                                                                                                                   


asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET  http://0.0.0.0:8001/vehicle-inventory/2/image
{'ResponseMetadata': {'RequestId': '970QZM0ZRXA84CPN', 'HostId': 'UdimS4YvRKrpv2tv5r0LSXXdLC8SZehGWvCZA9EqQpT4QXqi0s3jF0uB+krjA9bCiWtKArQETZrLsqc8gLrLSUMpNnpBKw9z', 'HTTPStatusCode': 200, 'HTTPHeaders': {'x-amz-id-2': 'UdimS4YvRKrpv2tv5r0LSXXdLC8SZehGWvCZA9EqQpT4QXqi0s3jF0uB+krjA9bCiWtKArQETZrLsqc8gLrLSUMpNnpBKw9z', 'x-amz-request-id': '970QZM0ZRXA84CPN', 'date': 'Tue, 27 Feb 2024 22:22:19 GMT', 'last-modified': 'Tue, 27 Feb 2024 22:06:50 GMT', 'etag': '"d41d8cd98f00b204e9800998ecf8427e"', 'x-amz-server-side-encryption': 'AES256', 'accept-ranges': 'bytes', 'content-type': 'binary/octet-stream', 'server': 'AmazonS3', 'content-length': '0'}, 'RetryAttempts': 0}, 'AcceptRanges': 'bytes', 'LastModified': datetime.datetime(2024, 2, 27, 22, 6, 50, tzinfo=tzutc()), 'ContentLength': 0, 'ETag': '"d41d8cd98f00b204e9800998ecf8427e"', 'ContentType': 'binary/octet-stream', 'ServerSideEncryption': 'AES256', 'Metadata': {}, 'Body': <botocore.response.StreamingBody object at 0x7f99808db940>}%                                                                                    

asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET  http://0.0.0.0:8001/vehicle-inventory/image/newCar.jpg
{'ResponseMetadata': {'RequestId': '3HDD29P1QGH9HTB2', 'HostId': '0KYMPvXr2Xo4rx93XgdKdzYIpzQy4+ZWgeDxVvzxvkv0fnAQbHg0esgG5BRCWtMdwha6dqI7D+g=', 'HTTPStatusCode': 200, 'HTTPHeaders': {'x-amz-id-2': '0KYMPvXr2Xo4rx93XgdKdzYIpzQy4+ZWgeDxVvzxvkv0fnAQbHg0esgG5BRCWtMdwha6dqI7D+g=', 'x-amz-request-id': '3HDD29P1QGH9HTB2', 'date': 'Tue, 27 Feb 2024 22:22:36 GMT', 'last-modified': 'Tue, 27 Feb 2024 22:06:50 GMT', 'etag': '"d41d8cd98f00b204e9800998ecf8427e"', 'x-amz-server-side-encryption': 'AES256', 'accept-ranges': 'bytes', 'content-type': 'binary/octet-stream', 'server': 'AmazonS3', 'content-length': '0'}, 'RetryAttempts': 0}, 'AcceptRanges': 'bytes', 'LastModified': datetime.datetime(2024, 2, 27, 22, 6, 50, tzinfo=tzutc()), 'ContentLength': 0, 'ETag': '"d41d8cd98f00b204e9800998ecf8427e"', 'ContentType': 'binary/octet-stream', 'ServerSideEncryption': 'AES256', 'Metadata': {}, 'Body': <botocore.response.StreamingBody object at 0x7f99808dbeb0>}%     

asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET http://0.0.0.0:8001/vehicle-inventory/history/         
{'id': 5, 'vehicle_id': 2, 'purchase_date': datetime.date(2024, 2, 27), 'purchase_price': 66000}%                                                                                                                      

asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET http://0.0.0.0:8001/vehicle-inventory/history/5
{'id': 5, 'vehicle_id': 2, 'purchase_date': datetime.date(2024, 2, 27), 'purchase_price': 66000}%                                                                                                                      

asakem@88665a24d661 vehicle-dealership-sample-app % curl -X GET http://0.0.0.0:8001/vehicle-inventory/history/5/vehicle
{'id': 2, 'make': 'BMW', 'model': 'M340', 'year': 2022, 'image_name': 'newCar.jpg'}%   

```

By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.

Author: AsakerMohd

sample-applications/vehicle-dealership-sample-app/README.md

@@ -70,6 +70,7 @@ psql -h <rds_url> -d vehicle_inventory -U root
 
 alter user djangouser with encrypted password '<password_of_your_choosing>';
 grant all privileges on database vehicle_inventory to djangouser;
+ALTER DATABASE vehicle_inventory OWNER TO djangouser;
 
 aws s3 sync s3://<s3_bucket_that_has_python_code> .
 
@@ -83,7 +84,7 @@ POSTGRES_DATABASE=vehicle_inventory
 POSTGRES_USER=djangouser
 POSTGRES_PASSWORD=<password_from_this_step>
 DB_SERVICE_HOST=<RDS_DB_endpoint>
-DB_SERVICE_PORT=3306
+DB_SERVICE_PORT=5432
 IMAGE_BACKEND_SERVICE_HOST=<image-service_ec2_public_IP>
 IMAGE_BACKEND_SERVICE_PORT=8000
 
@@ -119,10 +120,27 @@ They should be accessible through `0.0.0.0:8000` for the image service and `0.0.
 ## APIs
 
 The following are the APIs and what they do:
-1. GET /vehicle-inventory/: returns all the vehicles entries for postgres db
-2. POST /vehicle-inventory/: puts vehicle into db. For example: `curl -X POST http://0.0.0.0:8001/vehicle-inventory/ -d '{"make": "BMW","model": "M340","year": 2022,"image_name": "newCar.jpg"}'`
-3. GET /vehicle-inventory/<int>: returns vehicle entry with id = <int>
-4. GET /vehicle-inventory/<int>/image: returns image file information from S3 for the specific vehicle by calling the image microservice
-5. GET /images/name/<image_name>: returns image information for <image_name> from S3 if present. 
-6. POST /images/name/<image_name>: creates an empty file in S3. This is an async endpoint since it will put image name in an SQS queue and not wait for the file to be created in S3. Instead, a long running thread will poll SQS and then create the image file later. 
-7. GET /image/remote-image: makes a remote http call to google.com. 
+1. `GET /vehicle-inventory/heatlh-check/`: returns 200 if the vehicle service is up and running.
+2. `GET /vehicle-inventory/`: returns all the vehicles entries for postgres db
+3. `POST /vehicle-inventory/`: puts vehicle into db. For example: `curl -X POST http://0.0.0.0:8001/vehicle-inventory/ 
+   -d '{"make": "BMW","model": "M340","year": 2022,"image_name": "newCar.jpg"}'`
+4. `GET /vehicle-inventory/<int>`: returns vehicle entry with id = <int>
+5. `DELETE /vehicle-inventory/<int>`: deletes vehicle entry with id = <int>
+6. `GET /vehicle-inventory/name/<str>`: returns vehicle entries with name = <str>
+7. `GET /vehicle-inventory/<int>/image`: returns image file information from S3 for the specific vehicle by calling 
+   the image microservice
+8. `GET /vehicle-inventory/image/<image_name>`: returns image information for <image_name> from S3 if present through 
+   the image service.
+9. `POST /vehicle-inventory/image/<image_name>`: Calls the image service API `POST /images/name/<image_name>`
+10. `GET /vehicle-inventory/history/`: returns all the vehicle purchase history entries from postgres db
+11. `POST /vehicle-inventory/history/`: puts vehicle purchase history into db. For example: `curl -X POST http://0.0.0.
+   0:8001/vehicle-inventory/history/ -d '{"vehicle_id": "1","purchase_price": "66000"}'`
+12. `GET /vehicle-inventory/history/<int>`: returns vehicle purchase history entry with id = <int>
+13. `DELETE /vehicle-inventory/history/<int>`: deletes vehicle purchase history entry with id = <int>
+14. `GET /vehicle-inventory/history/<int>/vehicle`: returns vehicle entry that is linked to vehicle purchase history 
+    with id = <int>
+15. `GET /images/name/<image_name>`: returns image information for <image_name> from S3 if present. 
+16. `POST /images/name/<image_name>`: creates an empty file in S3. This is an async endpoint since it will put image 
+   name in an SQS queue and not wait for the file to be created in S3. Instead, a long running thread will poll SQS 
+   and then create the image file later. 
+17. `GET /image/remote-image`: makes a remote http call to google.com. 

sample-applications/vehicle-dealership-sample-app/VehicleInventoryApp/MainService/migrations/0002_vehiclepurchasehistory.py

@@ -0,0 +1,26 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+# pylint: skip-file
+# Generated by Django 5.0 on 2024-02-27 21:52
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("MainService", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="VehiclePurchaseHistory",
+            fields=[
+                ("id", models.AutoField(primary_key=True, serialize=False)),
+                ("purchase_date", models.DateField(auto_now_add=True)),
+                ("purchase_price", models.IntegerField()),
+                ("vehicle", models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to="MainService.vehicle")),
+            ],
+        ),
+    ]

sample-applications/vehicle-dealership-sample-app/VehicleInventoryApp/MainService/models.py

@@ -9,3 +9,10 @@ class Vehicle(models.Model):
     model = models.CharField(max_length=255)
     year = models.IntegerField()
     image_name = models.TextField(max_length=255)
+
+
+class VehiclePurchaseHistory(models.Model):
+    id = models.AutoField(primary_key=True)
+    vehicle = models.ForeignKey("Vehicle", on_delete=models.CASCADE)
+    purchase_date = models.DateField(auto_now_add=True)
+    purchase_price = models.IntegerField()

sample-applications/vehicle-dealership-sample-app/VehicleInventoryApp/MainService/url.py

@@ -6,7 +6,20 @@
 
 urlpatterns = [
     path("", views.vehicle, name="vehicle"),
-    path("<int:vehicle_id>", views.get_vehicle_by_id, name="get_vehicle_by_id"),
+    path("<int:vehicle_id>", views.vehicle_by_id, name="vehicle_by_id"),
+    path("make/<str:vehicles_make>", views.get_vehicles_by_make, name="get_vehicles_by_make"),
     path("<int:vehicle_id>/image", views.get_vehicle_image, name="get_vehicle_image"),
-    path("image/<str:image_name>", views.get_image_by_name, name="image_by_name"),
+    path("image/<str:image_name>", views.image, name="image"),
+    path("history/", views.vehicle_purchase_history, name="purchase_history"),
+    path(
+        "history/<int:vehicle_purchase_history_id>",
+        views.vehicle_purchase_history_by_id,
+        name="vehicle_purchase_history_by_id",
+    ),
+    path(
+        "history/<int:vehicle_purchase_history_id>/vehicle",
+        views.get_vehicle_from_vehicle_history,
+        name="get_vehicle_from_vehicle_history",
+    ),
+    path("health-check/", views.health_check, name="health_check"),
 ]

sample-applications/vehicle-dealership-sample-app/VehicleInventoryApp/MainService/views.py

@@ -8,11 +8,15 @@
 from django.http import HttpResponse, HttpResponseBadRequest, HttpResponseNotAllowed, HttpResponseNotFound
 from django.views.decorators.csrf import csrf_exempt
 from dotenv import load_dotenv
-from MainService.models import Vehicle
+from MainService.models import Vehicle, VehiclePurchaseHistory
 
 load_dotenv()
 
 
+def health_check(request):
+    return HttpResponse("Vehicle Inventory Service up and running!")
+
+
 def get_image_endpoint():
     load_dotenv()
     return "http://" + os.environ.get("IMAGE_BACKEND_SERVICE_HOST") + ":" + os.environ.get("IMAGE_BACKEND_SERVICE_PORT")
@@ -38,7 +42,8 @@ def vehicle(request):
     return HttpResponseNotAllowed("Only GET/POST requests are allowed!")
 
 
-def get_vehicle_by_id(request, vehicle_id):
+@csrf_exempt
+def vehicle_by_id(request, vehicle_id):
     if request.method == "GET":
         throttle_time = request.GET.get("throttle")
         if throttle_time:
@@ -49,6 +54,22 @@ def get_vehicle_by_id(request, vehicle_id):
         if not vehicle_objects:
             return HttpResponseNotFound("Vehicle with id=" + str(vehicle_id) + " is not found")
         return HttpResponse(vehicle_objects)
+    if request.method == "DELETE":
+        vehicle_objects = Vehicle.objects.filter(id=vehicle_id)
+        vehicle_objects_values = Vehicle.objects.filter(id=vehicle_id).values()
+        if not vehicle_objects_values:
+            return HttpResponseNotFound("Vehicle with id=" + str(vehicle_id) + " is not found")
+        vehicle_objects.delete()
+        return HttpResponse("Vehicle with id=" + str(vehicle_id) + " has been deleted")
+    return HttpResponseNotAllowed("Only GET/DELETE requests are allowed!")
+
+
+def get_vehicles_by_make(request, vehicles_make):
+    if request.method == "GET":
+        vehicles_objects = Vehicle.objects.filter(make=vehicles_make).values()
+        if not vehicles_objects:
+            return HttpResponseNotFound("Couldn't find any vehicle with make=" + str(vehicles_make))
+        return HttpResponse(vehicles_objects)
     return HttpResponseNotAllowed("Only GET requests are allowed!")
 
 
@@ -63,13 +84,73 @@ def get_vehicle_image(request, vehicle_id):
 
 
 @csrf_exempt
-def get_image_by_name(request, image_name):
+def image(request, image_name):
     print(image_name)
     if request.method == "GET":
         response = requests.get(build_image_url(image_name), timeout=10)
         if response.ok:
             return HttpResponse(response)
         return HttpResponseNotFound("Image with name: " + image_name + " is not found")
+    if request.method == "POST":
+        response = requests.post(build_image_url(image_name), timeout=10)
+        if response.ok:
+            return HttpResponse(response)
+        return HttpResponseNotFound("Image with name: " + image_name + " failed to saved")
+    return HttpResponseNotAllowed("Only GET/POST requests are allowed!")
+
+
+@csrf_exempt
+def vehicle_purchase_history(request):
+    if request.method == "POST":
+        body_unicode = request.body.decode("utf-8")
+        body = json.loads(body_unicode)
+        try:
+            vehicle_purchase_history_object = VehiclePurchaseHistory(
+                vehicle_id=body["vehicle_id"], purchase_price=body["purchase_price"]
+            )
+            vehicle_purchase_history_object.save()
+            return HttpResponse("VehiclePurchaseHistoryId = " + str(vehicle_purchase_history_object.id))
+        except KeyError as exception:
+            return HttpResponseBadRequest("Missing key: " + str(exception))
+    elif request.method == "GET":
+        vehicle_purchase_history_object = VehiclePurchaseHistory.objects.all().values()
+        return HttpResponse(vehicle_purchase_history_object)
+    return HttpResponseNotAllowed("Only GET/POST requests are allowed!")
+
+
+@csrf_exempt
+def vehicle_purchase_history_by_id(request, vehicle_purchase_history_id):
+    if request.method == "GET":
+        vehicle_purchase_history_object = VehiclePurchaseHistory.objects.filter(id=vehicle_purchase_history_id).values()
+        if not vehicle_purchase_history_object:
+            return HttpResponseNotFound(
+                "VehiclePurchaseHistory with id=" + str(vehicle_purchase_history_id) + " is not found"
+            )
+        return HttpResponse(vehicle_purchase_history_object)
+    if request.method == "DELETE":
+        vehicle_purchase_history_object = VehiclePurchaseHistory.objects.filter(id=vehicle_purchase_history_id)
+        vehicle_purchase_history_object_values = Vehicle.objects.filter(id=vehicle_purchase_history_id).values()
+        if not vehicle_purchase_history_object_values:
+            return HttpResponseNotFound(
+                "VehiclePurchaseHistory with id=" + str(vehicle_purchase_history_id) + " is not found"
+            )
+        vehicle_purchase_history_object.delete()
+        return HttpResponse("VehiclePurchaseHistory with id=" + str(vehicle_purchase_history_id) + " has been deleted")
+    return HttpResponseNotAllowed("Only GET/DELETE requests are allowed!")
+
+
+def get_vehicle_from_vehicle_history(request, vehicle_purchase_history_id):
+    if request.method == "GET":
+        vehicle_purchase_history_object = VehiclePurchaseHistory.objects.filter(id=vehicle_purchase_history_id).first()
+        if not vehicle_purchase_history_object:
+            return HttpResponseNotFound(
+                "VehiclePurchaseHistory with id=" + str(vehicle_purchase_history_id) + " is not found"
+            )
+        vehicle_id = getattr(vehicle_purchase_history_object, "vehicle_id")
+        vehicle_objects = Vehicle.objects.filter(id=vehicle_id).values()
+        if not vehicle_objects:
+            return HttpResponseNotFound("Vehicle with id=" + str(vehicle_id) + " is not found")
+        return HttpResponse(vehicle_objects)
     return HttpResponseNotAllowed("Only GET requests are allowed!")