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app.py
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app.py
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# built-in library imports
import json
import datetime
import os
import glob
# flask related imports
from flask import (
Flask,
render_template,
session,
redirect,
url_for,
flash,
jsonify,
make_response,
request,
abort,
flash,
send_from_directory,
)
from werkzeug.utils import secure_filename
from sqlalchemy import between, and_
import pandas
# local custom imports
from error import Error
from config import db, app, UPLOAD_FOLDER, ALLOWED_EXTENSIONS
import models
import zbce_queries
# TODO: Condense code and create functions/decorators for repeptitive code
# TODO: set the hardlimit somewhere else
limit_request = 1000
@app.route("/")
def main_page():
return "<h1>ZotBins Community Edition</h1>"
@app.route("/bin-info", methods=["POST", "GET"])
def bin_info():
try:
if request.method == "POST":
# Check if JSON request
if not request.json:
raise Error("JSON_FORMAT")
# Process request data
post_data = request.json["data"]
for row in post_data:
# bin_id, bin_height, location, bin_type, and waste_metrics must be present in body
if (
("ip_address" not in row)
or ("bin_height" not in row)
or ("location" not in row)
or ("bin_type" not in row)
or ("waste_metrics" not in row)
):
raise Error("MISSING_KEY")
# bin_id, bin_height, location, bin_type, and waste_metrics cannot be null
if (
(row["ip_address"] is None)
or (row["bin_height"] is None)
or (row["location"] is None)
or (row["bin_type"] is None)
or (row["waste_metrics"] is None)
):
raise Error("NULL_VALUE")
addToDatabase(
models.BinInfo(
ip_address=row["ip_address"],
bin_height=row["bin_height"],
location=row["location"],
bin_type=row["bin_type"],
waste_metrics=row["waste_metrics"],
)
)
return "Posted: " + str(request.json), 201
elif request.method == "GET":
bin_id = request.args.get("bin_id") # make sure you have the bin id
if bin_id is None: # checking is bin exists
raise Error("NULL_VALUE")
else:
# Get entries with same bin_id and between start_timestamp and end_timestamp
bin_data = models.BinInfo.query.filter(
models.BinInfo.id == bin_id
).all() # returns the bin data with matching bin id
if (
len(bin_data) > 0
): # check if the bin id surpasses the amount of bins in database
b = bin_data[0]
keys = [
"id",
"ip_address",
"bin_height",
"location",
"bin_type",
"waste_metrics",
] # keys
vals = [
b.id,
b.ip_address,
b.bin_height,
b.location,
b.bin_type,
b.waste_metrics,
] # values
return (
jsonify(dict(zip(keys, vals))),
200,
) # return the json of the keys and values :)
else:
return (
jsonify({"message": "No Bin Found"}),
404,
) # return error message is there's an error
except Error as e:
return Error.em[str(e)]
except Exception as e:
return str(e), 400
@app.route("/bin-info-all", methods=["GET"])
def get_bin_info_all():
try:
if request.method == "GET":
bins = models.BinInfo.query.all()
ret = {"data": []}
for the_bin in bins:
keys = [
"id",
"ip_address",
"bin_height",
"location",
"bin_type",
"waste_metrics",
]
vals = [
the_bin.id,
the_bin.ip_address,
the_bin.bin_height,
the_bin.location,
the_bin.bin_type,
the_bin.waste_metrics,
]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
except Exception as e:
return str(e), 400
@app.route("/usage", methods=["POST", "GET"])
def usage():
try:
if request.method == "POST":
# Check if JSON request
if not request.json:
raise Error("JSON_FORMAT")
# Process request data
post_data = request.json["data"]
for row in post_data:
# bin_id and datetime must be present in body
if ("bin_id" not in row) or ("datetime" not in row):
raise Error("MISSING_KEY")
# bin_id and datetime cannot be null
if (row["bin_id"] is None) or (row["datetime"] is None):
raise Error("NULL_VALUE")
# Check bin_id and return 400 if invalid bin_id
thebin = models.BinInfo.query.get(row["bin_id"])
if thebin is None:
raise Error("INVALID_BIN_ID")
# Add datetimestamp to db
addToDatabase(
models.BinUsage(datetimestamp=row["datetime"], bin=thebin)
)
return "Posted: " + str(request.json), 201
elif request.method == "GET":
# Get query parameters
bin_id = request.args.get("bin_id")
start_timestamp = request.args.get("start_timestamp")
end_timestamp = request.args.get("end_timestamp")
# None of the parameters can be null
if bin_id is None or start_timestamp is None or end_timestamp is None:
raise Error("INVALID_PARAM")
else:
# Get entries with same bin_id and between start_timestamp and end_timestamp
usage_data = models.BinUsage.query.filter(
and_(
models.BinUsage.bin_id == bin_id,
between(
models.BinUsage.datetimestamp,
start_timestamp,
end_timestamp,
),
)
).all()
ret = {"data": []}
for row in usage_data:
keys = ["bin_id", "timestamp"]
vals = [row.bin_id, str(row.datetimestamp)]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
except Error as e:
return Error.em[str(e)]
except Exception as e:
return str(e), 400
@app.route("/usage-today", methods=["GET"])
def get_usage_today():
try:
usage_data = models.BinUsage.query.filter(
models.BinUsage.datetimestamp > datetime.datetime.now().strftime("%Y-%m-%d")
).all()
ret = {"data": []}
for row in usage_data:
keys = ["id", "datetimestamp", "bin_id"] # ["id","datetime","bin_id"]
vals = [row.id, str(row.datetimestamp), row.bin_id]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
except Exception as e:
return str(e), 400
@app.route("/weight", methods=["POST", "GET"])
def weight():
try:
if request.method == "POST":
# Check if JSON request
if not request.json:
raise Error("JSON_FORMAT")
post_data = request.json["data"]
for row in post_data:
# bin_id, datetime, and weight must be present in body
if (
("bin_id" not in row)
or ("datetime" not in row)
or ("weight" not in row)
):
raise Error("MISSING_KEY")
# bin_id, datetime, or weight cannot be null
if (
(row["bin_id"] is None)
or (row["datetime"] is None)
or (row["weight"] is None)
):
raise Error("NULL_VALUE")
# Check if bin_id and return 400 if invalid bin_id
thebin = models.BinInfo.query.get(row["bin_id"])
if thebin is None:
raise Error("INVALID_BIN_ID")
# Add weight data to db
addToDatabase(
models.BinWeight(
datetimestamp=row["datetime"],
bin_weight=row["weight"],
bin=thebin,
)
)
return "Posted: " + str(request.json), 201
elif request.method == "GET":
# Get query parameters
bin_id = request.args.get("bin_id")
start_timestamp = request.args.get("start_timestamp")
end_timestamp = request.args.get("end_timestamp")
# None of the parameters can be null
if bin_id is None or start_timestamp is None or end_timestamp is None:
raise Error("NULL_VALUE")
else:
# Get entries with same bin_id and between start_timestamp and end_timestamp
weight_data = models.BinWeight.query.filter(
and_(
models.BinWeight.bin_id == bin_id,
between(
models.BinWeight.datetimestamp,
start_timestamp,
end_timestamp,
),
)
).all()
ret = {"data": []}
for row in weight_data:
keys = ["timestamp", "bin_weight", "bin_id"]
vals = [str(row.datetimestamp), row.bin_weight, row.bin_id]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
except Error as e:
return Error.em[str(e)]
except Exception as e:
return str(e), 400
@app.route("/weight-today", methods=["GET"])
def get_weight_today():
try:
weight_data = models.BinWeight.query.filter(
models.BinWeight.datetimestamp
> datetime.datetime.now().strftime("%Y-%m-%d")
).all()
ret = {"data": []}
for row in weight_data:
keys = ["id", "timestamp", "bin_weight", "bin_id"]
vals = [row.id, str(row.datetimestamp), row.bin_weight, row.bin_id]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
except Exception as e:
return str(e), 400
@app.route("/fullness", methods=["GET", "POST"])
def fullness_info():
try:
if request.method == "GET":
bin_id = request.args.get("bin_id")
start_timestamp = request.args.get("start_timestamp")
end_timestamp = request.args.get("end_timestamp")
# throw error if any required parameters are None
if bin_id == None or start_timestamp == None or end_timestamp == None:
raise Error("NULL_VALUE")
# throw error if start_timestamp > end_timestamp
if start_timestamp > end_timestamp:
raise Error("TIMESTAMP_ISSUE")
bins = models.BinFullness.query.filter(
and_(
models.BinFullness.bin_id == bin_id,
start_timestamp <= models.BinFullness.datetimestamp,
end_timestamp >= models.BinFullness.datetimestamp,
)
).all()
ret = {"data": []}
for the_bin in bins:
keys = ["id", "fullness", "bin_id", "datetimestamp"]
vals = [
the_bin.id,
the_bin.fullness,
the_bin.bin_id,
str(the_bin.datetimestamp),
]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
elif request.method == "POST":
# Process request data
if not request.json:
raise Error("JSON_FORMAT")
post_data = request.json["data"]
for row in post_data:
# bin_id, datetime, and fullness must be present in body
if (
("bin_id" not in row)
or ("datetime" not in row)
or ("fullness" not in row)
):
raise Error("MISSING_KEY")
# bin_id, datetime, or weight cannot be null
if (
(row["bin_id"] is None)
or (row["datetime"] is None)
or (row["fullness"] is None)
):
raise Error("NULL_VALUE")
# Check bin_id and return 400 if invalid bin_id
thebin = models.BinInfo.query.get(row["bin_id"])
if thebin is None:
raise Error("INVALID_BIN_ID")
# Add fullness to db
addToDatabase(
models.BinFullness(
datetimestamp=row["datetime"],
fullness=row["fullness"],
bin=thebin,
)
)
return "Posted: " + str(request.json), 201
except Error as e:
return Error.em[str(e)]
except Exception as e:
return str(e), 400
@app.route("/fullness-today", methods=["GET"])
def get_fullness():
try:
if request.method == "GET":
fullness_data = models.BinFullness.query.filter(
models.BinFullness.datetimestamp
> datetime.datetime.now().strftime("%Y-%m-%d")
).all()
ret = {"data": []}
for the_f in fullness_data:
keys = ["id", "datetimestamp", "fullness", "bin_id"]
vals = [
the_f.id,
str(the_f.datetimestamp),
the_f.fullness,
the_f.bin_id,
]
ret["data"].append(dict(zip(keys, vals)))
return jsonify(ret), 200
except Exception as e:
return str(e), 400
@app.route("/image", methods=["POST", "GET"])
def post_image():
"""
Post Request Example:
"""
if request.method == "POST":
if "file" not in request.files:
flash("no file part in request")
return redirect(request.url)
file = request.files["file"]
if file.filename == "":
flash("No selected file")
return redirect(request.url)
if file and allowed_file(file.filename):
# gather the datetime stamp for the filename
curr_datetime = datetime.datetime.utcnow()
# create filename
filename = secure_filename(
curr_datetime.strftime("%Y-%m-%d_%H-%M-%S") + "_" + file.filename
)
# check if file already exists
img_path = UPLOAD_FOLDER + "/" + filename
if os.path.isfile(img_path):
raise Error("IMAGE_EXISTS")
# save the file to the upload folder
file.save(os.path.join(app.config["UPLOAD_FOLDER"], filename))
return (
"Success",
200,
) # redirect(url_for('uploaded_file',filename=filename))
else:
# return a list of images
img_names = [
os.path.basename(x) for x in glob.glob(UPLOAD_FOLDER + "/*.jpg")
] # glob.glob(UPLOAD_FOLDER + '/*.jpg')
img_names.reverse()
return jsonify({"image_names": img_names[1:limit_request]}), 200
@app.route("/uploads/<filename>")
def uploaded_file(filename):
"""
This function is for viewing the uploaded files we have
"""
return send_from_directory(app.config["UPLOAD_FOLDER"], filename)
@app.route("/metric-csv", methods=["GET"])
def get_metrics_as_csv():
"""
**GET Request Parameters**
> `metric`
> `start_timestamp`
> `end_timestamp`
"""
try:
# get request parameters
metric = request.args.get("metric")
start_timestamp = request.args.get("start_timestamp")
end_timestamp = request.args.get("end_timestamp")
# throw error if any required parameters are None
if None in [metric, start_timestamp, end_timestamp]:
raise Error("NULL_VALUE")
# generate all function queries
fullness_query = models.BinFullness.query.filter(
and_(
start_timestamp <= models.BinFullness.datetimestamp,
end_timestamp >= models.BinFullness.datetimestamp,
)
).all
weight_query = models.BinWeight.query.filter(
and_(
start_timestamp <= models.BinWeight.datetimestamp,
end_timestamp >= models.BinWeight.datetimestamp,
)
).all
usage_query = models.BinUsage.query.filter(
and_(
start_timestamp <= models.BinUsage.datetimestamp,
end_timestamp >= models.BinUsage.datetimestamp,
)
).all
# generate dict of functions for querying specific data metric
data_query_func = {
"fullness": fullness_query,
"weight": weight_query,
"usage": usage_query,
}
# check if parameters are valid
if metric not in data_query_func.keys():
raise Error("INVALID_PARAM")
# throw error if start_timestamp > end_timestamp
if start_timestamp > end_timestamp:
raise Error("TIMESTAMP_ISSUE")
# call query function
query_data = data_query_func[metric]()
# iterate through each row of data
obj_dict = None
for row in query_data:
# convert fullness data into dictionary form such as {key1:str1, key2:str2}
row_dict_form = dict(row)
# assign obj_dict to appropriate keys based on model schema
if not obj_dict:
headers = row_dict_form.keys()
# create a dictionary of empty lists such as {key1:[], key2:[]}
obj_dict = dict(zip(headers, [[] for i in range(len(headers))]))
# append data to the obj_dict based on keys
for k in obj_dict.keys():
obj_dict[k].append(row_dict_form[k])
# create the pandas dataframe
df = pandas.DataFrame(obj_dict)
resp = make_response(df.to_csv(index=False))
file_name = "{}_{}_{}.csv".format(metric, start_timestamp, end_timestamp)
resp.headers["Content-Disposition"] = "attachment; filename=" + file_name
resp.headers["Content-Type"] = "text/csv"
# return as CSV file
return resp
except Error as e:
return Error.em[str(e)]
except Exception as e:
return str(e), 400
def allowed_file(filename):
"""
Checks whether or not the extension name is allowed.
"""
return "." in filename and filename.rsplit(".", 1)[-1].lower() in ALLOWED_EXTENSIONS
def paramMissing(required_params: tuple, row: iter) -> bool:
for p in required_params:
if p not in row:
return True
return False
# adding to database function
def addToDatabase(data):
db.session.add(data)
db.session.commit()
if __name__ == "__main__":
app.run(host="0.0.0.0", port="5001")