Migrate to new web-based configuration method

This commit adds a config page served with CherryPy on port 8888. As
part of this the config format was also changed to JSON. A migration
script is included and run by Puppet automatically.

.gitignore

@@ -1,4 +1,5 @@
 .vscode/
 config.py
+config.json
 *.pyc
 *.swp

.travis.yml

@@ -5,6 +5,5 @@ install:
   - pip install -r requirements.txt
   - pip install pylint
 script:
-  - pylint config.py.sample
   - pylint weather.py
 

PiWeatherRockConfig.service

@@ -0,0 +1,17 @@
+# this file is managed by Puppet
+[Unit]
+Description=PiWeatherRock Config Service
+After=network.target
+
+[Service]
+Type=simple
+User=pi
+Group=pi
+WorkingDirectory=/home/pi/PiWeatherRock
+Environment='DISPLAY=:0'
+ExecStart=/usr/bin/python3 /home/pi/PiWeatherRock/config_page.py
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target

config.json-sample

@@ -0,0 +1,23 @@
+{
+    "version": "0.0.13",
+    "ds_api_key": "API_KEY_HERE",
+    "lat": 0.112358,
+    "lon": 0.246810,
+    "units": "us",
+    "lang": "en",
+    "fullscreen": true,
+    "icon_offset": -23.5,
+    "update_freq": 300,
+    "info_pause": 300,
+    "info_delay": 900,
+    "plugins": {
+        "daily": {
+            "enabled": true,
+            "pause": 60
+        },
+        "hourly": {
+            "enabled": true,
+            "pause": 60
+        }
+    }
+}

config_page.py

@@ -0,0 +1,95 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# BEGIN LICENSE
+
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation
+# files (the "Software"), to deal in the Software without
+# restriction, including without limitation the rights to use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following
+# conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+# END LICENSE
+
+""" Configuration page for PiWeatherRock. """
+
+__version__ = "0.0.13"
+
+###############################################################################
+#   Raspberry Pi Weather Display Config Page Plugin
+#   Original By: github user: metaMMA          2020-03-15
+###############################################################################
+
+# standard imports
+import os
+import json
+
+# third-party imports
+import cherrypy
+
+with open(os.path.join(os.getcwd(), 'html/config.html'), 'r') as f:
+    html = f.read()
+
+
+class Config:
+
+    @cherrypy.expose()
+    def index(self):
+        return html
+
+    @cherrypy.tools.json_in()
+    @cherrypy.expose
+    def upload(self):
+        dst = f"{os.getcwd()}/config.json"
+
+        input_json = cherrypy.request.json
+        with open(dst, 'w') as f:
+            json.dump(input_json, f, indent=2, separators=(',', ': '))
+        self.index()
+
+
+if __name__ == '__main__':
+    cherrypy.quickstart(Config(), config={
+        'global': {
+            'server.socket_port': 8888,
+            'server.socket_host': '0.0.0.0'
+        },
+        '/serialize_script.js': {
+            'tools.staticfile.on': True,
+            'tools.staticfile.filename': os.path.join(
+                os.getcwd(), "html/serialize_script.js")
+        },
+        '/style.css': {
+            'tools.staticfile.on': True,
+            'tools.staticfile.filename': os.path.join(
+                os.getcwd(), "html/style.css")
+        },
+        '/chancetstorms.png': {
+            'tools.staticfile.on': True,
+            'tools.staticfile.filename': os.path.join(
+                os.getcwd(), "icons/256/chancetstorms.png")
+        },
+        '/bg.png': {
+            'tools.staticfile.on': True,
+            'tools.staticfile.filename': os.path.join(
+                os.getcwd(), "icons/bg.png")
+        },
+        '/config.json': {
+            'tools.staticfile.on': True,
+            'tools.staticfile.filename': os.path.join(
+                os.getcwd(), "config.json")
+        }
+    })