Reformat code

This reverts commit 97373e0ae2.

.gitignore

@@ -129,5 +129,13 @@ dmypy.json
 # Pyre type checker
 .pyre/
 
+# ---> VisualStudioCode
+.vscode/*
+#!.vscode/settings.json
+#!.vscode/tasks.json
+#!.vscode/launch.json
+#!.vscode/extensions.json
+*.code-workspace
+
 # InvMan custom
 postgres.ini

.pylintrc

@@ -0,0 +1,6 @@
+[TYPECHECK]
+ignored-modules=flask, flask_api, sqlalchemy
+generated-members=session.*
+
+[MESSAGES CONTROL]
+disable=pointless-string-statement

README.md

@@ -1,3 +1,203 @@
 # InvMan
 
-Inventory Manager
+## Table of Contents
+
+1. [What is InvMan?](#what-is-invman)
+2. [API Usage](#api-usage)
+    1. [GET Requests](#get-requests-getting-information)
+    2. [POST Requests](#post-requests-creating-objects)
+
+## What is InvMan?
+
+InvMan is a Flask app which provides a web API and web UI to keep inventory using a PostgreSQL backend.
+
+---
+
+## API Usage
+
+### GET requests (getting information)
+
+---
+Please keep in mind:
+
+* Text surrounded by `[` and `]` are parameters which should be replaced.
+* Names are case-sensitive.
+
+Get a list of locations
+
+```plaintext
+GET /api/v1/locations
+```
+
+Get information about a location
+
+```plaintext
+GET /api/v1/location/name/[location-name]
+```
+
+Get the quantities of all products at a location
+
+```plaintext
+GET /api/v1/location/[location-name]/quantities
+```
+
+Get the quantity of a product (by UPC) at a location
+
+```plaintext
+GET /api/v1/location/[location-name]/quantity/upc/[product-upc]
+```
+
+Get the quantity of a product (by name) at a location
+
+```plaintext
+GET /api/v1/location/[location-name]/quantity/name/[product-name]
+```
+
+Get a list of products
+
+```plaintext
+GET /api/v1/products
+```
+
+Get information about a product (by UPC)
+
+```plaintext
+GET /api/v1/product/upc/[product-upc]
+```
+
+Get information about a product (by name)
+
+```plaintext
+GET /api/v1/product/name/[product-name]
+```
+
+Get a list of brands
+
+```plaintext
+GET /api/v1/brands
+```
+
+Get information about a brand
+
+```plaintext
+GET /api/v1/brand/name/[brand-name]
+```
+
+Get a list of units
+
+```plaintext
+GET /api/v1/units
+```
+
+Get information about a unit (by name)
+
+```plaintext
+GET /api/v1/unit/name/[unit-name]
+```
+
+Get a list of purchases
+
+```plaintext
+GET /api/v1/purchases
+```
+
+Get information about a purchase (by id)
+
+```plaintext
+GET /api/v1/purchase/id/[purchase-id]
+```
+
+Get a list of uses
+
+```plaintext
+GET /api/v1/uses
+```
+
+Get information about a use (by id)
+
+```plaintext
+GET /api/v1/purchase/id/[use-id]
+```
+
+### POST Requests (creating objects)
+
+---
+
+Create a location
+
+```plaintext
+POST /api/v1/create_location
+```
+
+Request form:
+| Argument Name | Description                 | Required? |
+| ------------- | --------------------------- | --------- |
+| name          | Name of the location        | Yes       |
+| description   | Description of the location | No        |
+---
+Create a brand
+
+```plaintext
+POST /api/v1/create_brand
+```
+
+Request form:
+| Argument Name | Description              | Required? |
+| ------------- | ------------------------ | --------- |
+| name          | Name of the brand        | Yes       |
+| description   | Description of the brand | No        |
+---
+
+Create a unit
+
+```plaintext
+POST /api/v1/create_unit
+```
+
+Request form:
+| Argument Name | Description             | Required? |
+| ------------- | ----------------------- | --------- |
+| name          | Name of the unit        | Yes       |
+| description   | Description of the unit | No        |
+---
+Create a product
+
+```plaintext
+POST /api/v1/create_product
+```
+
+Request form:
+| Argument Name | Description                   | Required? |
+| ------------- | ----------------------------- | --------- |
+| upc           | UPC of the product            | Yes       |
+| brand         | Brand which makes the product | Yes       |
+| name          | Name of the product           | Yes       |
+| size          | Size of the product           | Yes       |
+| sizeunit      | Unit used in `size`           | Yes       |
+| description   | Description of the product    | No        |
+---
+Create a purchase
+
+```plaintext
+POST /api/v1/create_purchase
+```
+
+| Argument Name | Description                            | Required? |
+| ------------- | -------------------------------------- | --------- |
+| upc           | UPC of the product which was purchased | Yes       |
+| quantity      | Quantity of the product purchased      | Yes       |
+| date          | Date of this purchase                  | Yes       |
+| location      | Location to link this purchase to      | Yes       |
+---
+Create a use
+
+```plaintext
+POST /api/v1/create_use
+```
+
+| Argument Name | Description                       | Required? |
+| ------------- | --------------------------------- | --------- |
+| upc           | UPC of the product which was used | Yes       |
+| quantity      | Quantity of the product used      | Yes       |
+| date          | Date of this usage                | Yes       |
+| location      | Location to link this usage to    | Yes       |

libdb.py

@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+"""
+libdb
+
+Library for interacting with InvMan DB using SQLAlchemy
+"""
+
+from configparser import ConfigParser
+from sqlalchemy import create_engine, Column
+from sqlalchemy import String, Text, Date
+from sqlalchemy import BigInteger, Integer, SmallInteger, Float
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+
+def load_config():
+    """Load PostgreSQL config from postgres.ini"""
+    filename = "postgres.ini"
+    section = "postgresql"
+    parser = ConfigParser()
+    parser.read(filename)
+
+    config = {}
+    if parser.has_section(section):
+        params = parser.items(section)
+        for param in params:
+            config[param[0]] = param[1]
+    else:
+        raise Exception(
+            'Section {0} not found in the {1} file'.format(section, filename))
+    return config
+
+
+cfg = load_config()
+
+engine = create_engine(f"postgresql://{cfg['user']}:{cfg['pass']}@{cfg['host']}/{cfg['database']}",
+                       echo='debug')
+Base = declarative_base()
+Session = sessionmaker()
+Session.configure(bind=engine)
+
+
+class Location(Base):
+    """location table"""
+    __tablename__ = 'location'
+
+    name = Column(String(length=32), primary_key=True)
+    description = Column(Text)
+
+
+class ProductQuantity(Base):
+    """product_quantity table"""
+    __tablename__ = 'product_quantity'
+
+    product_upc = Column(String(length=32), primary_key=True)
+    name = Column(Text)
+    quantity = Column(BigInteger)
+    location = Column(String(length=32), primary_key=True)
+
+
+class Product(Base):
+    """product table"""
+    __tablename__ = 'product'
+
+    upc = Column(String(length=32), primary_key=True)
+    brand = Column(String(length=63))
+    name = Column(Text)
+    description = Column(Text)
+    size = Column(Float)
+    sizeunit = Column(String(length=32))
+
+
+class Brand(Base):
+    """brand table"""
+    __tablename__ = 'brand'
+
+    name = Column(String(length=63), primary_key=True)
+    description = Column(Text)
+
+
+class Unit(Base):
+    """unit table"""
+    __tablename__ = 'unit'
+
+    name = Column(String(length=32), primary_key=True)
+    description = Column(Text)
+
+
+class Purchase(Base):
+    """purchase table"""
+    __tablename__ = 'purchase'
+
+    id = Column(Integer, primary_key=True)
+    product_upc = Column(String(length=32))
+    quantity = Column(SmallInteger)
+    date = Column(Date)
+    location = Column(String(length=32))
+
+
+class Use(Base):
+    """use table"""
+    __tablename__ = 'use'
+
+    id = Column(Integer, primary_key=True)
+    product_upc = Column(String(length=32))
+    quantity = Column(SmallInteger)
+    date = Column(Date)
+    location = Column(String(length=32))

postgres.ini.default

@@ -0,0 +1,6 @@
+[postgresql]
+user=someone
+pass=SuperSecretPassword
+host=example.com
+port=5432
+database=inventory

requirements.txt

@@ -1,3 +1,4 @@
 Flask
 Flask_API
 psycopg2-binary
+sqlalchemy

templates/ui/products.html

@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html>
+
+<body>
+    <table border=1>
+        <tr>
+            <th>UPC</th>
+            <td>Brand</td>
+            <td>Name</td>
+            <td>Size</td>
+            <td>Size Unit</td>
+            <td>Description</td>
+        </tr>
+        {% for upc, brand, name, size, sizeunit, description in data %}
+        <tr>
+            <th> {{ upc }} </th>
+            <td> {{ brand }} </td>
+            <td> {{ name }} </td>
+            <td> {{ size }} </td>
+            <td> {{ sizeunit }} </td>
+            <td> {{ description }} </td>
+        </tr>
+        {% endfor %}
+    </table>
+</body>
+
+</html>

templates/ui/purchases.html

@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+
+<body>
+    <form action="./purchases">
+        <input type="text" placeholder="Location" name="location" />
+        <input type="submit" />
+        <br>
+        <input type="reset" value="Reset" onclick="parent.location='./purchases'" />
+    </form>
+    <table border=1>
+        <tr>
+            <th>ID</th>
+            <td>UPC</td>
+            <td>Quantity</td>
+            <td>Date</td>
+            <td>Location</td>
+        </tr>
+        {% for id, upc, quantity, date, location in data %}
+        <tr>
+            <th> {{ id }}</th>
+            <th> {{ upc }} </th>
+            <td> {{ quantity }} </td>
+            <td> {{ date }}</td>
+            <td> {{ location }} </td>
+        </tr>
+        {% endfor %}
+    </table>
+</body>
+
+</html>

templates/ui/quantities.html

@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html>
+
+<body>
+    <form action="./quantities">
+        <input type="text" placeholder="Location" name="location" />
+        <input type="submit" />
+        <br>
+        <input type="reset" value="Reset" onclick="parent.location='./quantities'" />
+    </form>
+    <table border=1>
+        <tr>
+            <th>UPC</th>
+            <td>Quantity</td>
+            <td>Location</td>
+        </tr>
+        {% for upc, quantity, location in data %}
+        <tr>
+            <th> {{ upc }} </th>
+            <td> {{ quantity }} </td>
+            <td> {{ location }} </td>
+        </tr>
+        {% endfor %}
+    </table>
+</body>
+
+</html>

templates/ui/uses.html

@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+
+<body>
+    <form action="./uses">
+        <input type="text" placeholder="Location" name="location" />
+        <input type="submit" />
+        <br>
+        <input type="reset" value="Reset" onclick="parent.location='./uses'" />
+    </form>
+    <table border=1>
+        <tr>
+            <th>ID</th>
+            <td>UPC</td>
+            <td>Quantity</td>
+            <td>Date</td>
+            <td>Location</td>
+        </tr>
+        {% for id, upc, quantity, date, location in data %}
+        <tr>
+            <th> {{ id }}</th>
+            <th> {{ upc }} </th>
+            <td> {{ quantity }} </td>
+            <td> {{ date }}</td>
+            <td> {{ location }} </td>
+        </tr>
+        {% endfor %}
+    </table>
+</body>
+
+</html>

versiontest.py

@@ -1,54 +0,0 @@
-#!/usr/bin/env python3
-"""
-libinv
-
-Library for interacting with inventory database.
-"""
-
-# Imports
-import psycopg2
-from configparser import ConfigParser
-
-def config(filename="postgres.ini", section="postgresql"):
-    parser = ConfigParser()
-    parser.read(filename)
-
-    db = {}
-    if parser.has_section(section):
-        params = parser.items(section)
-        for param in params:
-            db[param[0]] = param[1]
-    else:
-        raise Exception('Section {0} not found in the {1} file'.format(section, filename))
-
-    return db
-
-
-def connect():
-    """ Connect to the PostgreSQL database server """
-    conn = None
-    try:
-        params = config()
-
-        print("Connecting to the PostgreSQL database...")
-        conn = psycopg2.connect(**params)
-
-        cur = conn.cursor()
-
-        # execute a statement
-        print("Postgres version:")
-        cur.execute("SELECT version()")
-
-        # display the database version
-        db_version = cur.fetchone()
-        print(db_version)
-    except (Exception, psycopg2.DatabaseError) as e:
-        print(e)
-    finally:
-        if conn is not None:
-            conn.close()
-            print("Database connection closed.")
-
-
-if __name__ == '__main__':
-    connect()

webapi.py

@@ -1,301 +1,394 @@
 #!/usr/bin/env python3
 """
-InvMan
+InvMan Web API
+
+Web API for InvMan
 """
 
 # Imports
-from flask import Flask, request, jsonify, abort, g
+from flask import Flask, jsonify, request
 from flask_api import status
-import psycopg2
-from psycopg2 import pool
-from configparser import ConfigParser
+
+from sqlalchemy.orm.exc import NoResultFound
+from sqlalchemy.exc import IntegrityError
+from libdb import Session, Location, ProductQuantity, Product, Brand, Unit, Purchase, Use
 
 
 app = Flask(__name__)  # app is the Flask app
 
 
-filename = "postgres.ini"
-section = "postgresql"
-parser = ConfigParser()
-parser.read(filename)
-
-config = {}
-if parser.has_section(section):
-    params = parser.items(section)
-    for param in params:
-        config[param[0]] = param[1]
-else:
-    raise Exception('Section {0} not found in the {1} file'.format(section, filename))
-
-
-app.config['postgreSQL_pool'] = psycopg2.pool.SimpleConnectionPool(1, 20,
-    user = config['user'],
-    password = config['password'],
-    host = config['host'],
-    port = config['port'],
-    database = config['database'])
-
-
-def get_db():
-    if 'db' not in g:
-        g.db = app.config['postgreSQL_pool'].getconn()
-    return g.db
-
-
-@app.teardown_appcontext
-def close_conn(e):
-    db = g.pop('db', None)
-    if db is not None:
-        app.config['postgreSQL_pool'].putconn(db)
-
-
-@app.route("/api/v1/locations", methods = ["GET"])
+@app.route("/api/v1/locations", methods=["GET"])
 def get_locations():
-    db = get_db()
-    with db.cursor() as cur:
-        cur.execute("SELECT name,description FROM location")
-        data = cur.fetchall()
-        if len(data) <= 0:
-            print("no results returned, sending 404")
-            return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-        else:
-            print("ran SELECT name,description FROM location")
-            data2 = {}
-            for row in data:
-                data2[row[0]] = {}
-                data2[row[0]]['description'] = row[1]
-            # data2 = []
-            # for row in data:
-                # data2.append({'name': row[0], 'description': row[1]})
-            print("processed data:")
-            print(data2)
-            return jsonify(data2)
+    """Route to get locations"""
+    session = Session()
+    data = {}
+    try:
+        for name, desc in session.query(Location.name, Location.description):
+            data[name] = {'description': desc}
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+    return jsonify(data)
 
 
-@app.route("/api/v1/location/name/<search>", methods = ["GET"])
+@app.route("/api/v1/location/name/<search>", methods=["GET"])
 def api_get_location_information(search):
-    db = get_db()
-    with db.cursor() as cur:
-        cur.execute("SELECT name,description FROM location WHERE name = %s", (search,))
-        data = cur.fetchall()
-        print("ran SELECT name,description FROM location WHERE name = %s")
-        if len(data) <= 0:
-            print("no results returned, sending 404")
-            return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-        else:
-            data2 = {}
-            row = data[0]
-            data2['name'] = row[0]
-            data2['description'] = row[1]
-            print("processed data:")
-            print(data2)
-            return jsonify(data2)
+    """Route to get information about a location"""
+    session = Session()
+    try:
+        data = session.query(Location.name, Location.description). \
+            filter(Location.name == search).one()
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+    data2 = {}
+    data2['name'] = data.name
+    data2['description'] = data.description
+    return jsonify(data2)
 
 
-@app.route("/api/v1/location/<location>/quantities", methods = ["GET"])
+@app.route("/api/v1/location/<location>/quantities", methods=["GET"])
 def api_get_current_quantities(location):
-    db = get_db()
-    with db.cursor() as cur:
-        cur.execute("SELECT product_upc,quantity FROM product_quantity WHERE location = %s", (location,))
-        data = cur.fetchall()
-        print("ran SELECT product_upc,quantity FROM product_quantity WHERE location = %s")
-        if len(data) <= 0:
-            print("no results returned, sending 404")
-            return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-        else:
-            data2 = {}
-            for row in data:
-                data2[row[0]] = row[1]
-            print("processed data:")
-            print(data2)
-            return jsonify(data2)
+    """Route to get quantities in a location"""
+    session = Session()
+    data = {}
+    try:
+        for upc, quantity in session.query(ProductQuantity.product_upc, ProductQuantity.quantity) \
+                .filter(ProductQuantity.location == location).all():
+            data[upc] = quantity
+        return jsonify(data)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
 
 
-@app.route("/api/v1/location/<location>/quantity/<searchmethod>/<search>", methods = ["GET"])
+@app.route("/api/v1/location/<location>/quantity/<searchmethod>/<search>", methods=["GET"])
 def api_get_quantity_of_product_in_location(location, searchmethod, search):
-    db = get_db()
-    with db.cursor() as cur:
-        methodmap = {'upc': 'product_upc', 'name': 'name'}
-        if searchmethod in methodmap.keys():
-            method = methodmap[searchmethod]
-            cur.execute("SELECT quantity FROM product_quantity WHERE location = %s AND {0} = %s".format(method), (location, search))
-            data = cur.fetchall()
-            print("ran SELECT quantity FROM product_quantity WHERE location = %s AND {0} = %s".format(method))
-            if len(data) <= 0:
-                print("no results returned, sending 404")
-                return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-            else:
-                data2 = data[0][0]
-                print("processed data:")
-                print(data2)
-                return jsonify(data2)
+    """Route to get the quantity of a product at a location"""
+    session = Session()
+    try:
+        if searchmethod == 'upc':
+            data = session.query(ProductQuantity.quantity).filter(
+                ProductQuantity.location == location,
+                ProductQuantity.product_upc == search).one()
+            return jsonify(data[0])
+        elif searchmethod == 'name':
+            data = session.query(ProductQuantity.quantity).filter(
+                ProductQuantity.location == location,
+                ProductQuantity.name == search).one()
+            return jsonify(data[0])
         else:
             print("invalid search method, sending 400")
             return jsonify({'error': 'INVALID_SEARCH_METHOD'}), status.HTTP_400_BAD_REQUEST
 
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
 
-@app.route("/api/v1/products", methods = ["GET"])
+
+@app.route("/api/v1/products", methods=["GET"])
 def api_get_products():
-    db = get_db()
-    with db.cursor() as cur:
-        cur.execute("SELECT upc,brand,name,size,sizeunit,description FROM product")
-        data = cur.fetchall()
-        print("ran SELECT upc,brand,name,size,sizeunit,description FROM product")
-        if len(data) <= 0:
-            print("no results returned, sending 404")
-            return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-        else:
-            data2 = {}
-            for row in data:
-                data2[row[0]] = {'brand': row[1], 'name': row[2], 'size': row[3], 'sizeunit': row[4], 'description': row[5]}
-            print("processed data:")
-            print(data2)
-            return jsonify(data2)
+    """Route to get a list of products"""
+    session = Session()
+    try:
+        data = {}
+        for upc, brand, name, size, sizeunit, description in session.query(
+                Product.upc, Product.brand, Product.name,
+                Product.size, Product.sizeunit, Product.description).all():
+            data[upc] = {'brand': brand, 'name': name, 'size': size,
+                         'sizeunit': sizeunit, 'description': description}
+        return jsonify(data)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
 
-@app.route("/api/v1/product/<searchmethod>/<search>", methods = ["GET"])
+
+@app.route("/api/v1/product/<searchmethod>/<search>", methods=["GET"])
 def api_get_product_information(searchmethod, search):
-    db = get_db()
-    with db.cursor() as cur:
-        if searchmethod in ['name', 'upc']:
-            cur.execute("SELECT upc,brand,name,size,sizeunit,description FROM product WHERE {0} = %s".format(searchmethod), (search,))
-            data = cur.fetchall()
-            print("ran SELECT upc,brand,name,size,sizeunit,description FROM product WHERE {0} = %s")
-            if len(data) <= 0:
-                print("no results returned, sending 404")
-                return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-            else:
-                row = data[0]
+    """Route to get information about a product"""
+    session = Session()
+    try:
+        if searchmethod == 'name':
+            result = session.query(Product.upc, Product.brand, Product.name,
+                                   Product.size, Product.sizeunit, Product.description).filter(
+                Product.name == search
+            ).one()
+            data = {'upc': result[0], 'brand': result[1], 'name': result[2], 'size': result[3],
+                    'sizeunit': result[4], 'description': result[5]}
+            return jsonify(data)
 
-                data2 = {}
-                data2['upc'] = row[0]
-                data2['brand'] = row[1]
-                data2['name'] = row[2]
-                data2['size'] = row[3]
-                data2['sizeunit'] = row[4]
-                data2['description'] = row[5]
+        if searchmethod == 'upc':
+            result = session.query(Product.upc, Product.brand, Product.name,
+                                   Product.size, Product.sizeunit, Product.description).filter(
+                Product.upc == search
+            ).one()
+            data = {'upc': result[0], 'brand': result[1], 'name': result[2], 'size': result[3],
+                    'sizeunit': result[4], 'description': result[5]}
+            return jsonify(data)
 
-                print("processed data:")
-                print(data2)
-                return jsonify(data2)
         else:
             print("invalid search method, sending 400")
             return jsonify({'error': 'INVALID_SEARCH_METHOD'}), status.HTTP_400_BAD_REQUEST
 
-
-@app.route("/api/v1/brands", methods = ["GET"])
-def api_list_brands():
-    db = get_db()
-    with db.cursor() as cur:
-        cur.execute("SELECT name,description FROM brand")
-        data = cur.fetchall()
-        print("ran SELECT name,description FROM brand")
-        if len(data) <= 0:
-            print("no results returned, sending 404")
-            return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-        else:
-            data2 = {}
-            for row in data:
-                data2[row[0]] = {'description': row[1]}
-            print("processed data:")
-            print(data2)
-            return jsonify(data2)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
 
 
-@app.route("/api/v1/brand/name/<search>", methods = ["GET"])
+@app.route("/api/v1/brands", methods=["GET"])
+def api_get_brands():
+    """Route to get a list of all brands"""
+    session = Session()
+    try:
+        data = {}
+        for name, description in session.query(Brand.name, Brand.description).all():
+            data[name] = {'description': description}
+        return jsonify(data)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+
+
+@app.route("/api/v1/brand/name/<search>", methods=["GET"])
 def api_get_brand_by_name(search):
-    db = get_db()
-    with db.cursor() as cur:
-        cur.execute("SELECT name,description FROM brand WHERE name = %s", (search,))
-        data = cur.fetchall()
-        print("ran SELECT name,description FROM brand WHERE name = %s")
-        if len(data) <= 0:
-            print("no results returned, sending 404")
-            return jsonify({'error': 'NO_RESULTS_RETURNED'}), status.HTTP_404_NOT_FOUND
-        else:
-            data2 = {}
-            for row in data:
-                data2[row[0]] = {'description': row[1]}
-            print("processed data:")
-            print(data2)
-            return jsonify(data2)
+    """Route to get information about a location"""
+    session = Session()
+    try:
+        data = session.query(Brand.name, Brand.description).filter(
+            Brand.name == search).one()
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+    data2 = {'name': data.name, 'description': data.description}
+    return jsonify(data2)
 
 
-@app.route("/api/v1/create_location", methods = ["POST"])
+@app.route("/api/v1/units", methods=["GET"])
+def api_get_units():
+    """Route to get a list of all units"""
+    session = Session()
+    try:
+        data = {}
+        for name, description in session.query(Unit.name, Unit.description).all():
+            data[name] = {'description': description}
+        return jsonify(data)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+
+
+@app.route("/api/v1/unit/name/<search>", methods=["GET"])
+def api_get_unit_by_name(search):
+    """Route to get information about a unit"""
+    session = Session()
+    try:
+        data = session.query(Unit.name, Unit.description).filter(
+            Unit.name == search).one()
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+    data2 = {'name': data.name, 'description': data.description}
+    return jsonify(data2)
+
+
+@app.route("/api/v1/purchases", methods=["GET"])
+def api_get_purchases():
+    """Route to get a list of all purchases"""
+    session = Session()
+    try:
+        data = {}
+        query = session.query(Purchase.id,
+                              Purchase.product_upc, Purchase.quantity, Purchase.date,
+                              Purchase.location)
+        for purchase_id, upc, quantity, date, location in query:
+            data[purchase_id] = {'upc': upc, 'quantity': quantity,
+                                 'date': str(date), 'location': location}
+        return jsonify(data)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+
+
+@app.route("/api/v1/purchase/id/<search>", methods=["GET"])
+def api_get_purchase_by_id(search):
+    """Route to get information about a purchase"""
+    session = Session()
+    try:
+        data = session.query(Purchase.id, Purchase.product_upc, Purchase.quantity,
+                             Purchase.date, Purchase.location).filter(Purchase.id == search).one()
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+    data2 = {'id': data.id, 'upc': data.product_upc,
+             'quantity': data.quantity, 'date': str(data.date), 'location': data.location}
+    return jsonify(data2)
+
+
+@app.route("/api/v1/uses", methods=["GET"])
+def api_get_uses():
+    """Route to get a list of all uses"""
+    session = Session()
+    try:
+        data = {}
+        query = session.query(Use.id,
+                              Use.product_upc, Use.quantity, Use.date,
+                              Use.location)
+        for use_id, upc, quantity, date, location in query:
+            data[use_id] = {'upc': upc, 'quantity': quantity,
+                            'date': str(date), 'location': location}
+        return jsonify(data)
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+
+
+@app.route("/api/v1/use/id/<search>", methods=["GET"])
+def api_get_use_by_id(search):
+    """Route to get information about a use"""
+    session = Session()
+    try:
+        data = session.query(Use.id, Use.product_upc, Use.quantity,
+                             Use.date, Use.location).filter(Use.id == search).one()
+    except NoResultFound:
+        return jsonify({'error': 'NO_RESULT_FOUND'}), status.HTTP_404_NOT_FOUND
+    data2 = {'id': data.id, 'upc': data.product_upc,
+             'quantity': data.quantity, 'date': str(data.date), 'location': data.location}
+    return jsonify(data2)
+
+
+@app.route("/api/v1/create_location", methods=["POST"])
 def api_create_location():
-    db = get_db()
-    with db.cursor() as cur:
-        if "name" not in request.form:
-            return jsonify({'error': 'NO_NAME_PROVIDED'}), status.HTTP_400_BAD_REQUEST
-        else:
-            locname = request.form['name']
-        if "description" in request.form:
-            locdesc = request.form['description']
-        else:
-            locdesc = None
+    """Route to create a new location"""
+    session = Session()
+    if "name" not in request.form:
+        return jsonify({'error': 'NO_NAME_PROVIDED'}), status.HTTP_400_BAD_REQUEST
+    else:
+        locname = request.form['name']
+    if "description" in request.form:
+        locdesc = request.form['description']
+    else:
+        locdesc = None
 
-        print(locname, locdesc)
-        cur.execute("INSERT INTO location (name, description) VALUES (%s, %s)", (locname, locdesc))
-        print("ran INSERT INTO location (name, description) VALUES (%s, %s)")
-        db.commit()
-        print("committed changes to database")
-        return jsonify({'api_endpoint': '/api/v1/location/name/{0}'.format(locname)})
+    newlocation = Location(name=locname, description=locdesc)
+    session.add(newlocation)
+    print("added newlocation")
+    try:
+        session.commit()
+        print("committed")
+        return jsonify({'api_endpoints': f'/api/v1/location/name/{locname}'})
+    except IntegrityError:
+        session.rollback()
+        return jsonify({'error': 'INTEGRITY_ERROR'})
 
 
-@app.route("/api/v1/create_brand", methods = ["POST"])
+@app.route("/api/v1/create_brand", methods=["POST"])
 def api_create_brand():
-    db = get_db()
-    with db.cursor() as cur:
-        if "name" not in request.form:
-            return jsonify({'error': 'NO_NAME_PROVIDED'}), status.HTTP_400_BAD_REQUEST
-        else:
-            locname = request.form['name']
-        if "description" in request.form:
-            locdesc = request.form['description']
-        else:
-            locdesc = None
+    """Route to create a new brand"""
+    session = Session()
+    if "name" not in request.form:
+        return jsonify({'error': 'NO_NAME_PROVIDED'}), status.HTTP_400_BAD_REQUEST
+    else:
+        brandname = request.form['name']
+    if "description" in request.form:
+        branddesc = request.form['description']
+    else:
+        branddesc = None
 
-        print(locname, locdesc)
-        cur.execute("INSERT INTO brand (name, description) VALUES (%s, %s)", (locname, locdesc))
-        print("ran INSERT INTO brand (name, description) VALUES (%s, %s)")
-        db.commit()
-        print("committed changes to database")
-        return jsonify({'api_endpoint': '/api/v1/brand/name/{0}'.format(locname)})
+    newbrand = Brand(name=brandname, description=branddesc)
+    session.add(newbrand)
+    print("added newbrand")
+    try:
+        session.commit()
+        print("committed")
+        return jsonify({'api_endpoints': [f'/api/v1/brand/name/{brandname}']})
+    except IntegrityError:
+        session.rollback()
+        return jsonify({'error': 'INTEGRITY_ERROR'})
 
 
-# @app.route("/<location>/api/v1/item/<item>/<brand>/new_brand", methods = ["POST"])
-# def api_new_brand(location, item, brand):
-    # try:
-        # storage.init_brand(location, item, brand)
-        # print("Created brand {0} under item {1} at {2}".format(brand, item, location))
-        # return jsonify({'status': 'success'})
-    # except storage.AlreadyExistsError:
-        # return jsonify({'status': 'error', 'error': 'BRAND_ALREADY_EXISTS'}), status.HTTP_403_FORBIDDEN
+@app.route("/api/v1/create_product", methods=["POST"])
+def api_create_product():
+    """Route to create a new product"""
+    session = Session()
+    reqfields = ['upc', 'brand', 'name', 'size', 'sizeunit']
+    for field in reqfields:
+        if field not in request.form:
+            return jsonify({'error': f'NO_{field.upper()}_PROVIDED'}), status.HTTP_400_BAD_REQUEST
+    if "description" in request.form:
+        desc = request.form['description']
+    else:
+        desc = None
+
+    newproduct = Product(upc=request.form['upc'], brand=request.form['brand'],
+                         name=request.form['name'], size=request.form['size'],
+                         sizeunit=request.form['sizeunit'],
+                         description=desc)
+    session.add(newproduct)
+    print("added newproduct")
+    try:
+        session.commit()
+        print("committed")
+        return jsonify({'api_endpoints': [f'/api/v1/product/upc/{request.form["upc"]}',
+                                          f'/api/v1/product/name/{request.form["name"]}']})
+    except IntegrityError:
+        session.rollback()
+        return jsonify({'error': 'INTEGRITY_ERROR'})
 
 
-# @app.route("/<location>/api/v1/item/<item>/new_item", methods = ["POST"])
-# def api_new_item(location, item):
-    # try:
-        # storage.init_item(location, item)
-        # print("Created item {0} at {1}".format(item, location))
-        # return jsonify({'status': 'success'})
-    # except storage.AlreadyExistsError:
-        # return jsonify({'status': 'error', 'error': 'ITEM_ALREADY_EXISTS'}), status.HTTP_403_FORBIDDEN
+@app.route("/api/v1/create_unit", methods=["POST"])
+def api_create_unit():
+    """Route to create a new unit"""
+    session = Session()
+    if "name" not in request.form:
+        return jsonify({'error': 'NO_NAME_PROVIDED'}), status.HTTP_400_BAD_REQUEST
+    else:
+        unitname = request.form['name']
+    if "description" in request.form:
+        unitdesc = request.form['description']
+    else:
+        unitdesc = None
+
+    newunit = Unit(name=unitname, description=unitdesc)
+    session.add(newunit)
+    print("added newunit")
+    try:
+        session.commit()
+        print("committed")
+        return jsonify({'api_endpoints': [f'/api/v1/unit/name/{unitname}']})
+    except IntegrityError:
+        session.rollback()
+        return jsonify({'error': 'INTEGRITY_ERROR'})
 
 
-# @app.route("/<location>/api/v1/new_location", methods = ["POST"])
-# def api_new_location(location):
-    # try:
-        # storage.init_location(location)
-        # print("Created location {0}".format(location))
-        # return jsonify({'status': 'success'})
-    # except storage.AlreadyExistsError:
-        # return jsonify({'status': 'error', 'error': 'ITEM_ALREADY_EXISTS'}), status.HTTP_403_FORBIDDEN
+@app.route("/api/v1/create_purchase", methods=["POST"])
+def api_create_purchase():
+    """Route to create a new purchase"""
+    session = Session()
+    reqfields = ['upc', 'quantity', 'date', 'location']
+    for field in reqfields:
+        if field not in request.form:
+            return jsonify({'error': f'NO_{field.upper()}_PROVIDED'}), status.HTTP_400_BAD_REQUEST
+
+    newpurchase = Purchase(product_upc=request.form['upc'], quantity=request.form['quantity'],
+                           date=request.form['date'], location=request.form['location'])
+    session.add(newpurchase)
+    print("added newpurchase")
+    try:
+        session.commit()
+        print("committed")
+        return jsonify({'api_endpoints': [f'/api/v1/purchase/id/{newpurchase.id}']})
+    except IntegrityError:
+        session.rollback()
+        return jsonify({'error': 'INTEGRITY_ERROR'})
 
 
-# @app.route("/<location>/api/v1/item/<item>/<brand>/add_amount/<amount>", methods = ["POST"])
-# def api_add_amount(location, item, brand, amount):
-    # storage.increment_amount(location, item, brand, amount)
-    # return jsonify({'status': 'success'})
+@app.route("/api/v1/create_use", methods=["POST"])
+def api_create_use():
+    """Route to create a new use"""
+    session = Session()
+    reqfields = ['upc', 'quantity', 'date', 'location']
+    for field in reqfields:
+        if field not in request.form:
+            return jsonify({'error': f'NO_{field.upper()}_PROVIDED'}), status.HTTP_400_BAD_REQUEST
+
+    newuse = Use(product_upc=request.form['upc'], quantity=request.form['quantity'],
+                 date=request.form['date'], location=request.form['location'])
+    session.add(newuse)
+    print("added newuse")
+    try:
+        session.commit()
+        print("committed")
+        return jsonify({'api_endpoints': [f'/api/v1/use/id/{newuse.id}']})
+    except IntegrityError:
+        session.rollback()
+        return jsonify({'error': 'INTEGRITY_ERROR'})
 
 
 if __name__ == "__main__":

webui.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+"""
+InvMan Web UI
+
+Web User Interface for InvMan
+"""
+
+# Imports
+from flask import Flask, render_template, request
+
+from libdb import Session, Product, ProductQuantity, Purchase, Use
+
+
+app = Flask(__name__)  # app is the Flask app
+
+
+@app.route("/ui/products")
+def products_list_page():
+    """Route for the products page"""
+    session = Session()
+    data = session.query(
+        Product.upc, Product.brand, Product.name,
+        Product.size, Product.sizeunit, Product.description).all()
+    return render_template("ui/products.html", data=data)
+
+
+@app.route("/ui/quantities")
+def products_quantities_page():
+    """Route for the quantities page"""
+    session = Session()
+    query = session.query(ProductQuantity.product_upc,
+                          ProductQuantity.quantity, ProductQuantity.location)
+    if "location" in request.args:
+        searchloc = request.args['location']
+        if len(request.args['location']) > 0:
+            data = query.filter(ProductQuantity.location ==
+                                request.args['location']).all()
+        else:
+            data = query.all()
+    else:
+        searchloc = ""
+        data = query.all()
+    return render_template("ui/quantities.html", data=data, searchloc=searchloc)
+
+
+@app.route("/ui/purchases")
+def products_purchases_page():
+    """Route for the purchases page"""
+    session = Session()
+    query = session.query(Purchase.id, Purchase.product_upc,
+                          Purchase.quantity, Purchase.date, Purchase.location)
+    if "location" in request.args:
+        searchloc = request.args['location']
+        if len(request.args['location']) > 0:
+            data = query.filter(Purchase.location ==
+                                request.args['location']).all()
+        else:
+            data = query.all()
+    else:
+        searchloc = ""
+        data = query.all()
+    return render_template("ui/purchases.html", data=data, searchloc=searchloc)
+
+
+@app.route("/ui/uses")
+def products_uses_page():
+    """Route for the uses page"""
+    session = Session()
+    query = session.query(Use.id, Use.product_upc,
+                          Use.quantity, Use.date, Use.location)
+    if "location" in request.args:
+        searchloc = request.args['location']
+        if len(request.args['location']) > 0:
+            data = query.filter(Use.location ==
+                                request.args['location']).all()
+        else:
+            data = query.all()
+    else:
+        searchloc = ""
+        data = query.all()
+    return render_template("ui/uses.html", data=data, searchloc=searchloc)