add main.py; Dockerfile: build dependencies; TZ

.gitignore

@@ -1,3 +1,4 @@
 /secret/*.txt
 /data/*.xml
-src/__pycache__/
+/src/__pycache__/
+/plot/*.png

.idea/bbb-status.iml

@@ -7,4 +7,7 @@
     <orderEntry type="jdk" jdkName="Python 3.8 (xfconf-backup)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
+  <component name="PackageRequirementsSettings">
+    <option name="versionSpecifier" value="Greater or equal (&gt;=x.y.z)" />
+  </component>
 </module>

Dockerfile

@@ -2,11 +2,39 @@ FROM python:3.8-alpine
 
 WORKDIR /usr/src/
 
-COPY requirements.txt ./
+RUN apk update && \
-RUN pip3 install --no-cache-dir -r requirements.txt
+    apk add \
+        tzdata \
+        make automake gcc g++ subversion python3-dev \
+        zlib-dev jpeg-dev freetype-dev lcms2-dev libwebp-dev tcl-dev tk-dev harfbuzz-dev \
+          fribidi-dev libimagequant-dev libxcb-dev && \
+    rm -rf /var/cache/apk/*
+
+# source: https://serverfault.com/a/683651/537998
+ENV TZ=Europe/Berlin
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+#COPY requirements.txt ./
+#RUN pip3 install --no-cache-dir -r requirements.txt
+
+# LDFLAGS required for "pip install pillow"
+# otherwise this would be necessary:
+## RUN ln -s /usr/lib/x86_64-linux-gnu/libz.so /lib/
+## RUN ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /lib/
+# source: https://github.com/python-pillow/Pillow/issues/3103#issuecomment-382634946
+ENV LDFLAGS=-L/usr/lib/x86_64-linux-gnu/
+
+RUN python3 -m pip install --no-cache-dir --upgrade pip
+RUN python3 -m pip install --no-cache-dir --upgrade requests
+RUN python3 -m pip install --no-cache-dir --upgrade setuptools
+RUN python3 -m pip install --no-cache-dir --upgrade numpy
+RUN python3 -m pip install --no-cache-dir --upgrade pillow
+RUN python3 -m pip install --no-cache-dir --upgrade matplotlib
 
 COPY ./src/ ./
-RUN chmod +x ./langfingaz/logMeetingData.py
+RUN chmod +x ./langfingaz/main.py
 
 # unbuffered output option otherwise script sleeps before any output appears
-CMD [ "python", "-u", "./langfingaz/logMeetingData.py" ]
+# python -u
+ENTRYPOINT [ "python", "-u", "./langfingaz/main.py" ]
+CMD [ "log-verbose" ]

docker-compose.yml

@@ -2,9 +2,11 @@ version: '3.7'
 services:
   dk-gen:
     build: .
+    command: ["log"]  # see main.py for available commandline arguments
     environment:
-        # pythonpath is required to import from self created modules (langfingaz)
+      - PYTHONPATH=/usr/src/  # pythonpath is required to import from self created modules ("from langfingaz ...")
-      - PYTHONPATH=/usr/src/
+      - PYTHONUNBUFFERED=1
     volumes:
       - ./secret:/usr/secret
       - ./data:/usr/data
+      - ./plot:/usr/plot

requirements.txt

@@ -1 +1,2 @@
 requests>=2.25.0
+matplotlib>=3.3.3

src/langfingaz/logMeetingData.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python3
 
+import sys
 import time
 from pathlib import Path
 
@@ -13,6 +14,8 @@ def sleepFiveMin(verbose=False):
 
     if verbose:
         print(">> Sleeping for five minutes <<")
+
+    sys.stdout.flush()
     time.sleep(fiveMinutes)
 
 
@@ -27,7 +30,7 @@ def v2(folder: Path = saveData.getDefaultFolder()):
         meetings = parseMeetings.parseMeetingsData(meetingsStr)
         bbbStatus = parseMeetings.BbbStatus(meetings)
         bbbStatusStr = str(bbbStatus)
-        print(util.indentMultilineStr(bbbStatusStr))
+        print(util.indentMultilineStr(bbbStatusStr), flush=True)
 
         sleepFiveMin(verbose=True)
 
@@ -35,7 +38,7 @@ def v2(folder: Path = saveData.getDefaultFolder()):
 def v1(folder: Path = saveData.getDefaultFolder()):
     while True:
         saveData.requestAndSaveMeetingData(folder)
-        print('.', end='')
+        print('.', end='', flush=True)
         sleepFiveMin()
 
 

src/langfingaz/main.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python3
+from sys import argv
+
+from langfingaz import plotMeetings
+from langfingaz import logMeetingData
+
+
+def main():
+    print("=== bbb-status ===")
+    print(">> given args: " + str(argv))
+    print()
+
+    usageStr = 'Usage:\n' + argv[0] + ' [log|log-verbose|plot]\n' + \
+               '\tlog: log BBB meeting data every 5 minutes;\n' + \
+               '\t  prints one dot after each successfully saved file\n' + \
+               '\tlog-verbose: log BBB meeting every 5 minute and write current status to stdout\n' + \
+               '\tplot: saves a plot of the saved BBB meeting data\n'
+
+    if len(argv) != 2:
+        raise ValueError("Expected one commandline argument!")
+
+    if argv[1] == "log":
+        logMeetingData.v1()
+    elif argv[1] == "log-verbose":
+        logMeetingData.v2()
+    elif argv[1] == "plot":
+        plotMeetings.plotMeetings()
+    else:
+        print(usageStr)
+        exit(1)
+
+
+if __name__ == '__main__':
+    main()

src/langfingaz/plotMeetings.py

@@ -1,5 +1,6 @@
 from pathlib import Path
 from typing import List
+import numpy
 import matplotlib.pyplot as plt  # TODO
 from datetime import datetime
 
@@ -9,19 +10,24 @@ from langfingaz.parseMeetings import BbbStatus, Meeting
 from langfingaz.util import fileUtil
 
 
-def plotMeetings(folder: Path):
+def getDefaultPlotFolder() -> Path:
+    return fileUtil.getProjectBaseDir().joinpath("plot")
+
+
+def plotMeetings(dataDir: Path = fileUtil.getProjectBaseDir().joinpath("data")):
     bbbStati: List[BbbStatus] = []
 
-    for file in folder.iterdir():
+    for file in dataDir.iterdir():
         if file.name.endswith(".xml"):
             dataStr, t = loadData.loadData(file)
             meetings: List[Meeting] = parseMeetings.parseMeetingsData(dataStr)
             bbbStati.append(parseMeetings.BbbStatus(meetings, t))
 
-    doPlotMeetings(bbbStati)
+    image: Path = doPlotMeetings(bbbStati)
+    print("saved image at " + str(image))
 
 
-def doPlotMeetings(bbbStati: List[BbbStatus]):
+def doPlotMeetings(bbbStati: List[BbbStatus]) -> Path:
     time = []  # x-axis: time
     participants = []  # yAxis (1)
     videos = []  # yAxis (2)
@@ -33,7 +39,6 @@ def doPlotMeetings(bbbStati: List[BbbStatus]):
         videos.append(bbbStatus.videoCount)
         voices.append(bbbStatus.voiceParticipantCount)
 
-
     # Note that even in the OO-style, we use `.pyplot.figure` to create the figure.
     fig, ax = plt.subplots()  # Create a figure and an axes.
     ax.plot(time, participants, label='participants')  # Plot some data on the axes.
@@ -44,9 +49,14 @@ def doPlotMeetings(bbbStati: List[BbbStatus]):
     ax.set_title("BigBlueButton Statistics")  # Add a title to the axes.
     ax.legend()  # Add a legend.
 
-    fig.savefig(fileUtil.setDatetimePrefix(fileUtil.getProjectBaseDir().joinpath("plot"), datetime.now()))
+    image: Path = getDefaultPlotFolder().joinpath(
-    plt.show()
+        "{}_until_{}".format(fileUtil.asString(time[0]), fileUtil.asString(time[-1]))
+    )
+    fig.savefig(image)
+    # plt.show()
+
+    return image
 
 
 if __name__ == '__main__':
-    plotMeetings(fileUtil.getProjectBaseDir().joinpath("data"))
+    plotMeetings()

src/langfingaz/util/fileUtil.py

@@ -24,9 +24,13 @@ def __getDatetimePrefixLength() -> int:
     return len("20200101_120030")  # 1st January 2020, 12:00 and 30 seconds
 
 
+def asString(t: datetime) -> str:
+    return t.strftime('%Y%m%d_%H%M%S')
+
+
 def setDatetimePrefix(file: Path, t: datetime) -> Path:
     # filename = file.name
-    prefix = t.strftime('%Y%m%d_%H%M%S')
+    prefix = asString(t)
     filename = prefix + "_" + file.name
     return file.parent.joinpath(filename)