From f15f151bb9b968e3b6967676dfed178d0dba1b59 Mon Sep 17 00:00:00 2001
From: JP <jpvanosta@gmail.com>
Date: Tue, 6 Feb 2018 22:14:15 +0100
Subject: [PATCH] coinadvice v1

---
 Cryptocoin.py | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/Cryptocoin.py b/Cryptocoin.py
index 6f725b9..8f4557d 100644
--- a/Cryptocoin.py
+++ b/Cryptocoin.py
@@ -3,6 +3,7 @@ import discord
 from discord.ext import commands
 from urllib import request
 import json, requests
+import time
 
 class Cryptocoin(object):
 	"""Voor al uw crypto currency advies."""
@@ -12,6 +13,23 @@ class Cryptocoin(object):
 		self.voice_states = {}
 	def __check(self, ctx): #Todo: Is dit het geld-verdienen kanaal?
 		return True
+		
+		
+	#borrowed from: http://jmduke.com/posts/basic-linear-regressions-in-python/
+	def basic_linear_regression(self, x, y):
+		# Basic computations to save a little time.
+		length = len(x)
+		sum_x = sum(x)
+		sum_y = sum(y)
+
+		# Sx^2, and Sxy respectively.
+		sum_x_squared = sum(map(lambda a: a * a, x))
+		sum_of_products = sum([x[i] * y[i] for i in range(length)])
+
+		# Magic formulae!
+		a = (sum_of_products - (sum_x * sum_y) / length) / (sum_x_squared - ((sum_x ** 2) / length))
+		b = (sum_y - a * sum_x) / length
+		return a, b
 	
 	def getCoinPrice(self, coinId, currencyId="USD", time="now"):
 		url = "https://min-api.cryptocompare.com/data/pricehistorical?tsyms=" + currencyId + "&fsym=" + coinId
@@ -27,6 +45,39 @@ class Cryptocoin(object):
 		except:
 			return -1
 			
+	def analyseCoin(self, coinId):
+		N_DATAPOINTS = 12
+		TIME_BETWEEN_DATAPOINTS = 86400 * 7 #one week
+
+		history = []			
+		for j in range(0, N_DATAPOINTS):
+			history.append(self.getCoinPrice(coinId, "USD", int(time.time()) - (N_DATAPOINTS-j)*TIME_BETWEEN_DATAPOINTS))
+		
+		#print(history)
+		
+		growFactorLongTerm, dummy =  self.basic_linear_regression(range(0, N_DATAPOINTS), history)
+		growFactorShortTerm, dummy = self.basic_linear_regression(range(0, 3), 
+			[ history[N_DATAPOINTS-3], history[N_DATAPOINTS-2], history[N_DATAPOINTS-1] ])
+			
+		#print("long:   ", growFactorLongTerm)
+		#print("short:  ", growFactorShortTerm)
+		
+		#print(growFactor)
+
+		if (history[N_DATAPOINTS-1] != 0):
+			growPercentageLongTerm  = growFactorLongTerm  / history[N_DATAPOINTS-1]
+			growPercentageShortTerm = growFactorShortTerm / history[N_DATAPOINTS-1]
+		
+		growPercentage = growPercentageLongTerm*0.3 + growPercentageShortTerm*0.7 #weighted average
+		return growPercentage, history
+        
+        #TODO:
+        # - iets met stabiliteit?
+        # - https://en.wikipedia.org/wiki/Head_and_shoulders_(chart_pattern)
+        # - neural networks???
+	
+	#user functions below
+	
 	@commands.command(pass_context=True)
 	@asyncio.coroutine
 	def coinprice(self, ctx, coinId: str, currencyId: str="USD"):
@@ -38,6 +89,9 @@ class Cryptocoin(object):
 		"""
 		allowedCurrencies = ["USD", "EUR", "JPY", "GBP", "CNY", "CAD", "BTC"]
 		
+		coinId = coinId.upper()
+		currencyId = currencyId.upper()
+		
 		if (currencyId not in allowedCurrencies):
 			yield from ctx.channel.send("Valuta " + currencyId + " ken ik niet. :disappointed: ")
 			return
@@ -50,5 +104,34 @@ class Cryptocoin(object):
 		
 		yield from ctx.channel.send(coinId + " is nu " + str(price) + " " + currencyId + " waard.")
 		
+	@commands.command(pass_context=True)
+	@asyncio.coroutine
+	def coinadvice(self, ctx, coinId: str=""):
+		"""Voor al uw adviezen in monopolygeld
+		"""	
+		
+		if(coinId == ""):
+			return #TODO
+		
+		coinId = coinId.upper()
+		
+		growPercentage, dummy = self.analyseCoin(coinId)
+		
+		if (growPercentage < -0.1):
+			yield from ctx.channel.send("Sell! Sell! Sell! " + coinId + " gaat erg slecht.")
+		elif (growPercentage < -0.03):
+			yield from ctx.channel.send("Als je " + coinId + " hebt, verkopen die handel.")
+		elif (growPercentage < 0):
+			yield from ctx.channel.send("Het gaat niet zo goed met " + coinId + ".")
+		elif (growPercentage < 0.015):
+			yield from ctx.channel.send(coinId + " lijkt redelijk stabiel.")
+		elif (growPercentage < 0.035):
+			yield from ctx.channel.send("Tijd om " + coinId + " te kopen.")
+		elif (growPercentage < 0.06):
+			yield from ctx.channel.send(coinId + " groeit snel")
+		elif (growPercentage < 0.1):
+			yield from ctx.channel.send("Het gaat heel goed met " + coinId + "!")
+		else:
+			yield from ctx.channel.send("To the moon! " + coinId + " is niet meer te stoppen!")
 		
 		
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