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from flask import Flask, send_file, jsonify, request
from flask_cors import CORS
from sql.pg_handler import PostgresHandler
import fileutil as fs
import datetime
import pandas
from sklearn.linear_model import Ridge
import numpy as np
import os
from dotenv import load_dotenv
load_dotenv()
app = Flask(__name__)
CORS(app)
def create_database_connection():
"""
Creates a database connection using the environment variables
:param: auth_append: str = "" - If you want to use a different set of variables for persisitance of sessions
"""
hostname = os.environ.get("POSTGRES_HOST")
user = os.environ.get("POSTGRES_USER")
password = os.environ.get("POSTGRES_PASSWORD")
database = os.environ.get("POSTGRES_DATABASE")
return PostgresHandler(host_name=hostname, username=user, password=password, database=database, port=5432)
@app.route("/")
def index():
try:
return send_file("index.html")
except Exception as e:
return jsonify({"error": str(e)})
@app.route("/api/subscribers")
def api_subscribers():
server = create_database_connection()
query = 'SELECT sd.*, h.* FROM subscriber_data sd INNER JOIN "24h_historical" h ON sd.channel_id = h.channel_id ORDER BY sd.subscriber_count DESC'
data = server.execute_query(query)
channel_data_list = [{"channel_name": row[3], "profile_pic": row[2], "subscribers": row[4], "sub_org": row[5], "video_count": row[6], "views": row[8], "day_diff": int(row[4] - int(row[11]))} for row in data]
subscriber_data = {"timestamp": datetime.datetime.now(), "channel_data": channel_data_list}
return jsonify(subscriber_data)
@app.route("/api/subscribers/<channel_name>")
def api_subscribers_channel(channel_name):
server = create_database_connection()
query = "SELECT * FROM subscriber_data_historical WHERE name = %s AND timestamp > %s ORDER BY TO_CHAR(timestamp, 'YYYY-MM-DD')"
data = server.execute_query(query, (channel_name, os.environ.get("START_DATE"),))
labels = []
data_points = []
seen_dates = set()
for row in data:
date_string = row[5].strftime("%Y-%m-%d")
if date_string in seen_dates:
continue
labels.append(date_string)
data_points.append(row[4])
seen_dates.add(date_string)
return jsonify({"labels": labels, "datasets": data_points})
@app.route("/api/subscribers/<channel_name>/7d")
def api_subscribers_channel_7d(channel_name):
server = create_database_connection()
query = "SELECT * FROM subscriber_data_historical WHERE name = %s ORDER BY TO_CHAR(timestamp, 'YYYY-MM-DD')"
data = server.execute_query(query, (channel_name,))
labels = []
data_points = []
seen_dates = set()
for row in data:
date_string = row[5].strftime("%Y-%m-%d")
if date_string in seen_dates:
continue
labels.append(date_string)
data_points.append(row[4])
seen_dates.add(date_string)
return jsonify({"labels": labels[-7:], "datasets": data_points[-7:]})
@app.route("/api/subscribers/<channel_name>/milestones")
def get_channel_milestones(channel_name):
server = create_database_connection()
milestone_increment = int(request.args.get("q", 10000))
initial_milestone = 10000
current_milestone = initial_milestone
query = """
SELECT subscriber_count, MIN(timestamp)
FROM subscriber_data_historical
WHERE name = %s
GROUP BY subscriber_count
ORDER BY subscriber_count ASC
"""
data = server.execute_query(query, (channel_name,))
dates = []
milestones = []
for row in data:
subscriber_count = row[0]
while subscriber_count >= current_milestone:
date_string = row[1].strftime("%Y-%m-%d")
dates.append(date_string)
milestones.append(current_milestone)
current_milestone += milestone_increment
return jsonify({"milestones": milestones, "dates": dates})
@app.route("/api/channel/<channel_name>")
def get_channel_information(channel_name):
def find_next_milestone(subscriber_count):
if subscriber_count < 100000:
return ((subscriber_count // 10000) + 1) * 10000
elif subscriber_count < 1000000:
return ((subscriber_count // 100000) + 1) * 100000
else:
return ((subscriber_count // 1000000) + 1) * 1000000
server = create_database_connection()
query = "SELECT * FROM subscriber_data WHERE name = %s"
data = server.execute_query(query, (channel_name,))
channel_data = {"channel_id": data[0][1], "channel_name": data[0][3], "profile_pic": data[0][2], "subscribers": data[0][4], "sub_org": data[0][5], "video_count": data[0][6], "view_count": data[0][8]}
historical_data = server.execute_query("SELECT * FROM subscriber_data_historical WHERE name = %s", (channel_name,))
current_subscriber_count = data[0][4]
subscriber_points = []
date_strings = []
seen_dates = set()
for row in historical_data:
date_string = row[5].strftime("%Y-%m-%d")
if date_string in seen_dates:
continue
subscriber_points.append(row[4])
date_strings.append(date_string)
seen_dates.add(date_string)
data = {"subscribers": subscriber_points, "dates": date_strings}
df = pandas.DataFrame(data=data)
df['dates'] = pandas.to_datetime(df['dates'])
df.set_index('dates', inplace=True)
df.sort_index(inplace=True)
three_months_ago = datetime.datetime.now() - datetime.timedelta(days=90)
df = df[df.index > three_months_ago]
try:
model = Ridge(alpha=100)
X = np.array(range(len(df))).reshape(-1, 1)
y = df['subscribers']
model.fit(X, y)
next_milestone = find_next_milestone(current_subscriber_count)
days_until_next_milestone = (next_milestone - model.intercept_) / model.coef_
days_until_next_milestone_scalar = int(days_until_next_milestone[0])
today = datetime.datetime.now().date()
next_milestone_date = today + datetime.timedelta(days=days_until_next_milestone_scalar)
time_until_next_milestone = (next_milestone_date - today).days
if time_until_next_milestone < 0:
raise OverflowError
channel_data["next_milestone_date"] = str(next_milestone_date)
channel_data["days_until_next_milestone"] = str(time_until_next_milestone)
channel_data["next_milestone"] = str(next_milestone)
except OverflowError:
channel_data["next_milestone_date"] = "N/A"
channel_data["days_until_next_milestone"] = "N/A"
channel_data["next_milestone"] = "N/A"
return jsonify(channel_data)
@app.route("/api/announcement")
def api_announcement():
announcement_data = {"message": "None", "show_message": False}
return jsonify(announcement_data)
@app.errorhandler(404)
def not_found(error):
return jsonify(error=str(error)), 404
if __name__ == "__main__":
app.run(debug=True)
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