Display playtime graph on session list

Fixes #29

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.2.2 / 2023-01-15 17:59+01:00
+
+* Display playtime graph on session list (https://git.kucharczyk.xyz/lukas/timetracker/issues/29)
+* Fix error when showing session list with no sessions (https://git.kucharczyk.xyz/lukas/timetracker/issues/31)
+
 ## 0.2.1 / 2023-01-13 16:53+01:00
 
 * List number of sessions when filtering on session list

Dockerfile

@@ -6,7 +6,7 @@ RUN npm install && \
 
 FROM python:3.10.9-alpine
 
-ENV VERSION_NUMBER 0.2.1
+ENV VERSION_NUMBER 0.2.2
 ENV PROD 1
 
 RUN apk add \

poetry.lock

@@ -96,6 +96,81 @@ files = [
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
 ]
 
+[[package]]
+name = "contourpy"
+version = "1.0.7"
+description = "Python library for calculating contours of 2D quadrilateral grids"
+category = "main"
+optional = false
+python-versions = ">=3.8"
+files = [
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+    {file = "contourpy-1.0.7.tar.gz", hash = "sha256:d8165a088d31798b59e91117d1f5fc3df8168d8b48c4acc10fc0df0d0bdbcc5e"},
+]
+
+[package.dependencies]
+numpy = ">=1.16"
+
+[package.extras]
+bokeh = ["bokeh", "chromedriver", "selenium"]
+docs = ["furo", "sphinx-copybutton"]
+mypy = ["contourpy[bokeh]", "docutils-stubs", "mypy (==0.991)", "types-Pillow"]
+test = ["Pillow", "matplotlib", "pytest"]
+test-no-images = ["pytest"]
+
 [[package]]
 name = "cssbeautifier"
 version = "1.14.7"
@@ -112,6 +187,18 @@ editorconfig = ">=0.12.2"
 jsbeautifier = "*"
 six = ">=1.13.0"
 
+[[package]]
+name = "cycler"
+version = "0.11.0"
+description = "Composable style cycles"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "cycler-0.11.0-py3-none-any.whl", hash = "sha256:3a27e95f763a428a739d2add979fa7494c912a32c17c4c38c4d5f082cad165a3"},
+    {file = "cycler-0.11.0.tar.gz", hash = "sha256:9c87405839a19696e837b3b818fed3f5f69f16f1eec1a1ad77e043dcea9c772f"},
+]
+
 [[package]]
 name = "django"
 version = "4.1.5"
@@ -215,6 +302,32 @@ files = [
 [package.extras]
 test = ["pytest (>=6)"]
 
+[[package]]
+name = "fonttools"
+version = "4.38.0"
+description = "Tools to manipulate font files"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "fonttools-4.38.0-py3-none-any.whl", hash = "sha256:820466f43c8be8c3009aef8b87e785014133508f0de64ec469e4efb643ae54fb"},
+    {file = "fonttools-4.38.0.zip", hash = "sha256:2bb244009f9bf3fa100fc3ead6aeb99febe5985fa20afbfbaa2f8946c2fbdaf1"},
+]
+
+[package.extras]
+all = ["brotli (>=1.0.1)", "brotlicffi (>=0.8.0)", "fs (>=2.2.0,<3)", "lxml (>=4.0,<5)", "lz4 (>=1.7.4.2)", "matplotlib", "munkres", "scipy", "skia-pathops (>=0.5.0)", "sympy", "uharfbuzz (>=0.23.0)", "unicodedata2 (>=14.0.0)", "xattr", "zopfli (>=0.1.4)"]
+graphite = ["lz4 (>=1.7.4.2)"]
+interpolatable = ["munkres", "scipy"]
+lxml = ["lxml (>=4.0,<5)"]
+pathops = ["skia-pathops (>=0.5.0)"]
+plot = ["matplotlib"]
+repacker = ["uharfbuzz (>=0.23.0)"]
+symfont = ["sympy"]
+type1 = ["xattr"]
+ufo = ["fs (>=2.2.0,<3)"]
+unicode = ["unicodedata2 (>=14.0.0)"]
+woff = ["brotli (>=1.0.1)", "brotlicffi (>=0.8.0)", "zopfli (>=0.1.4)"]
+
 [[package]]
 name = "gunicorn"
 version = "20.1.0"
@@ -319,6 +432,84 @@ files = [
 editorconfig = ">=0.12.2"
 six = ">=1.13.0"
 
+[[package]]
+name = "kiwisolver"
+version = "1.4.4"
+description = "A fast implementation of the Cassowary constraint solver"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+files = [
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 python-versions = ">=3.7"
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+    {file = "Pillow-9.4.0-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:8f127e7b028900421cad64f51f75c051b628db17fb00e099eb148761eed598c9"},
+    {file = "Pillow-9.4.0.tar.gz", hash = "sha256:a1c2d7780448eb93fbcc3789bf3916aa5720d942e37945f4056680317f1cd23e"},
+]
+
+[package.extras]
+docs = ["furo", "olefile", "sphinx (>=2.4)", "sphinx-copybutton", "sphinx-inline-tabs", "sphinx-issues (>=3.0.1)", "sphinx-removed-in", "sphinxext-opengraph"]
+tests = ["check-manifest", "coverage", "defusedxml", "markdown2", "olefile", "packaging", "pyroma", "pytest", "pytest-cov", "pytest-timeout"]
+
 [[package]]
 name = "platformdirs"
 version = "2.6.2"
@@ -488,6 +911,21 @@ files = [
 dev = ["pre-commit", "tox"]
 testing = ["pytest", "pytest-benchmark"]
 
+[[package]]
+name = "pyparsing"
+version = "3.0.9"
+description = "pyparsing module - Classes and methods to define and execute parsing grammars"
+category = "main"
+optional = false
+python-versions = ">=3.6.8"
+files = [
+    {file = "pyparsing-3.0.9-py3-none-any.whl", hash = "sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc"},
+    {file = "pyparsing-3.0.9.tar.gz", hash = "sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb"},
+]
+
+[package.extras]
+diagrams = ["jinja2", "railroad-diagrams"]
+
 [[package]]
 name = "pytest"
 version = "7.2.0"
@@ -512,6 +950,33 @@ tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
+[[package]]
+name = "python-dateutil"
+version = "2.8.2"
+description = "Extensions to the standard Python datetime module"
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+files = [
+    {file = "python-dateutil-2.8.2.tar.gz", hash = "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86"},
+    {file = "python_dateutil-2.8.2-py2.py3-none-any.whl", hash = "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"},
+]
+
+[package.dependencies]
+six = ">=1.5"
+
+[[package]]
+name = "pytz"
+version = "2022.7.1"
+description = "World timezone definitions, modern and historical"
+category = "main"
+optional = false
+python-versions = "*"
+files = [
+    {file = "pytz-2022.7.1-py2.py3-none-any.whl", hash = "sha256:78f4f37d8198e0627c5f1143240bb0206b8691d8d7ac6d78fee88b78733f8c4a"},
+    {file = "pytz-2022.7.1.tar.gz", hash = "sha256:01a0681c4b9684a28304615eba55d1ab31ae00bf68ec157ec3708a8182dbbcd0"},
+]
+
 [[package]]
 name = "pyyaml"
 version = "6.0"
@@ -681,7 +1146,7 @@ testing-integration = ["build[virtualenv]", "filelock (>=3.4.0)", "jaraco.envs (
 name = "six"
 version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -814,4 +1279,4 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "fd85e51c8fb99824a433b451c9712b7418c13688b9eb0e8ca6c51768f544e48f"
+content-hash = "01d5c9b89b638c993f8540298dedfa79321b3aac1b2af70da58ef77706d0a113"

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "timetracker"
-version = "0.2.1"
+version = "0.2.2"
 description = "A simple time tracker."
 authors = ["Lukáš Kucharczyk <lukas@kucharczyk.xyz>"]
 license = "GPL"
@@ -11,6 +11,8 @@ python = "^3.10"
 django = "^4.1.4"
 gunicorn = "^20.1.0"
 uvicorn = "^0.20.0"
+pandas = "^1.5.2"
+matplotlib = "^3.6.3"
 
 [tool.poetry.group.dev.dependencies]
 black = "^22.12.0"

src/web/common/util/plots.py

@@ -0,0 +1,64 @@
+import pandas as pd
+import matplotlib.pyplot as plt
+from matplotlib.dates import date2num
+import base64
+from io import BytesIO
+from tracker.models import Session
+from django.db.models import Sum, IntegerField, F
+from django.db.models.functions import TruncDay
+import logging
+from datetime import datetime
+from django.db.models import QuerySet
+
+
+def key_value_to_value_value(data):
+    return {data["date"]: data["hours"]}
+
+
+def playtime_over_time_chart(queryset: QuerySet = Session.objects):
+    microsecond_in_second = 1000000
+    result = (
+        queryset.annotate(date=TruncDay("timestamp_start"))
+        .values("date")
+        .annotate(
+            hours=Sum(
+                F("duration_calculated") + F("duration_manual"),
+                output_field=IntegerField(),
+            )
+        )
+        .values("date", "hours")
+    )
+    keys = []
+    values = []
+    running_total = int(0)
+    for item in result:
+        date_value = datetime.strftime(item["date"], "%d-%m-%Y")
+        keys.append(date_value)
+        running_total += int(item["hours"] / (3600 * microsecond_in_second))
+        values.append(running_total)
+    data = [keys, values]
+    return get_chart(data, title="Playtime over time", xlabel="Date", ylabel="Hours")
+
+
+def get_graph():
+    buffer = BytesIO()
+    plt.savefig(buffer, format="svg", transparent=True)
+    buffer.seek(0)
+    image_png = buffer.getvalue()
+    graph = base64.b64encode(image_png)
+    graph = graph.decode("utf-8")
+    buffer.close()
+    return graph
+
+
+def get_chart(data, title="", xlabel="", ylabel=""):
+    plt.style.use("dark_background")
+    plt.switch_backend("SVG")
+    fig = plt.figure(figsize=(10, 4))
+    plt.plot(data[0], data[1])
+    plt.title(title)
+    plt.xlabel(xlabel)
+    plt.ylabel(ylabel)
+    plt.tight_layout()
+    chart = get_graph()
+    return chart

src/web/tracker/static/base.css

@@ -794,6 +794,10 @@ select {
   margin-top: 1rem;
 }
 
+.mb-5 {
+  margin-bottom: 1.25rem;
+}
+
 .ml-1 {
   margin-left: 0.25rem;
 }

src/web/tracker/templates/list_sessions.html

@@ -4,11 +4,16 @@
 
 {% block content %}
         <div class="text-center text-xl mb-4 dark:text-slate-400">
+            {% if dataset.count >= 2 %}
+            <img src="data:image/svg+xml;base64,{{ chart|safe }}" class="mx-auto mb-5" />
             <a href="{% url 'start_session' dataset.last.purchase.id %}">
                 <button type="button" title="Track last tracked" class="py-1 px-2 bg-green-600 hover:bg-green-700 focus:ring-green-500 focus:ring-offset-blue-200 text-white transition ease-in duration-200 text-center text-base font-semibold shadow-md focus:outline-none focus:ring-2 focus:ring-offset-2 rounded-lg ">
                     New session of {{ dataset.last.purchase }}
                 </button>
             </a>
+            {% else %}
+            Playtime chart will be displayed when there are 2 or more sessions.
+            {% endif %}
             {% if purchase %}
             <h1>Listing sessions only for purchase "{{ purchase }}"</h1>
             <h2>Total playtime: {{ total_duration }} over {{ dataset.count }} sessions.</h2>

src/web/tracker/views.py

@@ -8,6 +8,7 @@ from django.conf import settings
 from common.util.time import now as now_with_tz, format_duration
 from django.db.models import Sum
 import logging
+from common.util.plots import playtime_over_time_chart
 
 
 def model_counts(request):
@@ -68,6 +69,7 @@ def list_sessions(request, purchase_id=None):
 
     context["total_duration"] = dataset.total_duration()
     context["dataset"] = dataset
+    context["chart"] = playtime_over_time_chart(dataset)
 
     return render(request, "list_sessions.html", context)