initial commit

apps/monitor/admin.py

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+from django.contrib import admin
+
+# Register your models here.

apps/monitor/apps.py

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+from django.apps import AppConfig
+
+
+class MonitorConfig(AppConfig):
+    name = 'monitor'

apps/monitor/calc.py

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+from django.db import connection
+from apps.transactions.models import Transaction
+from apps.rates.models import ExchangeRate
+from decimal import Decimal
+import datetime
+
+class Calc:
+  def ShowDiffRate(self, DayDiff, CurrentRate, Crypto, Fiat):
+    with connection.cursor() as cursor:
+        sql = """SELECT rate, datetime_valid FROM exchangerate WHERE crypto_currency = %s AND fiat_currency = %s
+           AND datetime_valid BETWEEN %s AND %s
+           ORDER BY datetime_valid DESC"""
+        startDate = datetime.datetime.now() - datetime.timedelta(days=int(DayDiff))
+        endDate = startDate + datetime.timedelta(days=1)
+        cursor.execute(sql, [Crypto, Fiat, startDate, endDate])
+        rateMinusXDay = cursor.fetchone()
+        if rateMinusXDay:
+            return {"dateRelative": "%s days ago" % (DayDiff,), "date" : rateMinusXDay[1], "rateEUR": rateMinusXDay[0],
+                "diffPercentage": (CurrentRate.rate-Decimal(rateMinusXDay[0]))/Decimal(rateMinusXDay[0])*100, "rateUSD": None}
+    return None
+
+  def GetCurrentValue(self, userid, crypto, total_investment, current_value, total_tax_free):
+    amount_kept = 0
+    out = {}
+    out["crypto"] = crypto
+
+    with connection.cursor() as cursor:
+        sql = """SELECT SUM(amount_after_fee) as after_fee, SUM(amount) as amount FROM `transaction` WHERE amount >= 0 and crypto_currency=%s and owner_id=%s"""
+        cursor.execute(sql, [crypto, userid])
+        bought = cursor.fetchone()
+        if bought[1]:
+          out["bought"] = bought[1]
+          total_investment += Decimal(bought[1])
+          amount_kept += Decimal(bought[0])
+        else:
+          out["bought"] = None
+    
+    with connection.cursor() as cursor:
+        sql = """SELECT SUM(amount_before_fee) as before_fee, SUM(amount) as amount FROM `transaction` WHERE amount < 0 and crypto_currency=%s and owner_id=%s"""
+        cursor.execute(sql, [crypto, userid])
+        sold = cursor.fetchone()
+        if sold[1]:
+          out["sold"] = sold[1]
+          total_investment += Decimal(sold[1])
+          amount_kept += Decimal(sold[0])
+        else:
+          out["sold"] = None
+
+    rateEUR = ExchangeRate.objects.filter(crypto_currency=crypto, fiat_currency='EUR').order_by('-datetime_valid').first()
+    rateUSD = ExchangeRate.objects.filter(crypto_currency=crypto, fiat_currency='USD').order_by('-datetime_valid').first()
+
+    if rateEUR:
+      cv =  Decimal(rateEUR.rate) * amount_kept
+      current_value += cv
+      out["current_value"] = cv
+      out["amount_kept"] = amount_kept
+      out["rateEUR"] = rateEUR.rate
+    else:
+      out["current_value"] = None
+      out["amount_kept"] = None
+      out["rateEUR"] = None
+
+    out["rates"] = []
+    if rateUSD and rateEUR:
+        out["rates"].append({"dateRelative": "Now", "date" : rateEUR.datetime_valid, "rateEUR": rateEUR.rate, "diffPercentage": None, "rateUSD": rateUSD.rate})
+
+    if rateEUR:
+      for daydiff in ["1", "3", "7", "14", "30"]:
+        diffrate = self.ShowDiffRate(daydiff, rateEUR, crypto, 'EUR')
+        if diffrate:
+          out["rates"].append(diffrate)
+
+    amount_within_past_year = 0
+    with connection.cursor() as cursor:
+        sql = """SELECT SUM(amount_after_fee) as amount FROM `transaction` WHERE amount > 0 and crypto_currency=%s and owner_id=%s and date_valid>%s"""
+        cursor.execute(sql, [crypto, userid, datetime.datetime.now() - datetime.timedelta(days=365)])
+        bought = cursor.fetchone()
+        out["bought_recently"] = None
+        if bought[0]:
+          out["bought_recently"] = bought[0]
+          amount_within_past_year = Decimal(bought[0])
+        amount_available_to_sell = amount_kept - amount_within_past_year
+        out["bought_tax_free"] = None
+        out["value_tax_free"] = None
+        if rateEUR:
+          out["bought_tax_free"] = amount_available_to_sell
+          out["value_tax_free"] = amount_available_to_sell * rateEUR.rate
+          total_tax_free += out["value_tax_free"]
+
+    return (total_investment, current_value, total_tax_free, rateEUR.rate, rateUSD.rate, out)

apps/monitor/models.py

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+from django.db import models
+
+# Create your models here.

apps/monitor/templates/monitor.html

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+{% extends 'base.html' %}
+
+{% block content %}
+<div class="form-box">
+  <h2>Monitor</h2>
+  <p>Hint: these numbers are not very accurate.</p>
+  
+{% for c in cryptos %}
+  <input type="checkbox" id="acc{{ c.crypto }}" />
+  <label for="acc{{ c.crypto }}">
+    {{ c.crypto }}
+    {% if c.rateEUR %}{{c.rateEUR|floatformat:0}} EUR{% endif %}
+    {% if c.rateUSD %}{{c.rateUSD|floatformat:0}} USD{% endif %}
+  </label>
+
+  <div class="content">
+    {% if c.bought %}
+    We have bought {{ c.crypto }} for {{ c.bought|floatformat:2 }} EUR<br/>
+    {% endif %}
+    {% if c.sold %}
+    We have sold {{ c.crypto }} for {{ c.sold|floatformat:2 }} EUR<br/>
+    {% endif %}
+    {% if c.amount_kept %}
+    Current value of our {{ c.amount_kept|floatformat:3 }} {{ c.crypto }} is {{ c.current_value|floatformat:2 }} EUR<br/>
+    {% endif %}
+    {% if c.bought_recently %}
+    We have bought within the last 12 months:  {{ c.bought_recently|floatformat:3 }} {{ c.crypto }}<br/>
+    {% endif %}
+    {% if c.bought_tax_free %}
+    We can sell without paying taxes: {{ c.bought_tax_free|floatformat:3 }} {{ c.crypto }} for {{ c.value_tax_free|floatformat:2 }} EUR<br/>
+    {% endif %}
+
+    {% if c.rates %}
+      <table>
+        {% for r in c.rates %}
+        <tr>
+            <td>{{ r.dateRelative }}</td>
+            <td>{{ r.date|date:'Y-m-d' }}</td>
+            <td>{{ r.rateEUR|floatformat:0 }} EUR/{{ c.crypto }}
+              {% if r.rateUSD %}
+                <br/>
+                {{ r.rateUSD|floatformat:0 }} USD/{{ c.crypto }}
+              {% endif %}
+            </td>
+            <td>{% if r.diffPercentage %}
+                {{ r.diffPercentage|floatformat:1 }}%
+                {% endif %}
+            </td>
+        </tr>
+        {% endfor %}
+      </table>
+    {% endif %}
+
+    <br/><a href="/transactions/show?crypto={{ c.crypto }}">My transactions</a><br/>
+    <br/>
+    Google: <br/>
+    <a href='https://www.google.com/search?channel=crow2&client=firefox-b-d&q={{ c.crypto }}+in+eur%3D' target='_blank'>{{ c.crypto }} in EUR</a><br/>
+    <a href='https://www.google.com/search?channel=crow2&client=firefox-b-d&q={{ c.crypto }}+in+usd%3D' target='_blank'>{{ c.crypto }} in USD</a><br/>
+  </div>
+
+{% endfor %}
+  
+</div>
+{% endblock %}

apps/monitor/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

apps/monitor/views.py

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+from django.shortcuts import render, redirect
+from django.contrib.auth.decorators import login_required
+from apps.transactions.models import Transaction
+from apps.rates.models import ExchangeRate
+from apps.monitor.calc import Calc
+
+@login_required
+def monitor(request):
+    transactions = Transaction.objects.filter(owner=request.user)
+    crypto_currencies = {tr.crypto_currency for tr in transactions}
+    cryptos = []
+    total_investment = 0
+    current_value = 0
+    total_tax_free = 0
+    calc = Calc()
+
+    for crypto in crypto_currencies:
+        (total_investment, current_value, total_tax_free, rateEUR, rateUSD, out2) = calc.GetCurrentValue(request.user.id, crypto, total_investment, current_value, total_tax_free)
+
+        cryptos.append({"crypto": crypto, "rateEUR": rateEUR, "rateUSD": rateUSD, **out2})
+
+    return render(request,"monitor.html",{'cryptos':cryptos})