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GNU GENERAL PUBLIC LICENSE
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BUNDLE_PATH = "nightscout-follower@treehouse.org.za.zip"
EXTENSION_DIR = "nightscout-follower@treehouse.org.za"
all: build install
.PHONY: build install clean translations lint lint-fix
build:
rm -f $(BUNDLE_PATH)
cd $(EXTENSION_DIR); \
gnome-extensions pack --force --podir=locale \
--extra-source=icons/; \
mv $(EXTENSION_DIR).shell-extension.zip ../$(BUNDLE_PATH)
install:
gnome-extensions install $(BUNDLE_PATH) --force
clean:
@rm -fv $(BUNDLE_PATH)
@rm -fv $(EXTENSION_DIR)/schemas/gschemas.compiled
translations:
@./update-locale.sh

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README.md Normal file
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# Nightscout for GNOME Shell
This extension integrates Nightscout into GNOME Shell.
## Features
* Retrieve glucose values from Nightscout.
* Show a notification when your glucose readings are missing.
* High, low and missing readings notifications on your GNOME message tray.
* Glucose is falling down and raising up notifications on your GNOME message tray.
## Missing features
* Localization support
* Configurable levels for alerts (now 80 mg/dL for low and 180 mg/dL for high)
* Configurable delta for raising and falling alerts (now -10 mg/dL for falling and +10 mg/dL for raising)
* Full graph of recent levels when clicking on the indicator
### Main repository
The primary repository for this extenstion is [https://git.treehouse.org.za/tim/gnome-shell-extension-nightscout-follower](https://git.treehouse.org.za/tim/gnome-shell-extension-nightscout-follower).
### Credits
This extension is partially based on the [Nightscout for GNOME Shell](https://github.com/fnandot/gnome-shell-extension-nightscout/) extension by Fernando Pradas.

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nightscout-follower@treehouse.org.za/extension.js Normal file
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/* extension.js
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
import Clutter from 'gi://Clutter';
import GLib from 'gi://GLib';
import GObject from 'gi://GObject';
import Gio from 'gi://Gio';
import Gtk from 'gi://Gtk';
import St from 'gi://St';
import Soup from 'gi://Soup';
import {Extension, gettext as _} from 'resource:///org/gnome/shell/extensions/extension.js';
import * as Main from 'resource:///org/gnome/shell/ui/main.js';
import * as PanelMenu from 'resource:///org/gnome/shell/ui/panelMenu.js';
import * as PopupMenu from 'resource:///org/gnome/shell/ui/popupMenu.js';
import * as MessageTray from 'resource:///org/gnome/shell/ui/messageTray.js';
export default class NightscoutExtension extends Extension {
enable() {
this._settings = this.getSettings();
this._httpSession = new Soup.Session();
this._indicator = new PanelMenu.Button(0.0, this.metadata.name, false);
this._systemSource = MessageTray.getSystemSource();
this._label = new St.Label({
text: "Loading...",
y_align: Clutter.ActorAlign.CENTER,
style_class: 'fresh_data',
});
this._indicator.add_child(this._label);
//this._indicator.menu.addAction(_('Preferences'),
// () => this.openPreferences());
Main.panel.addToStatusArea(this.uuid, this._indicator);
this._update();
this._timeout = GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, 60, () => {
this._update();
return GLib.SOURCE_CONTINUE;
});
this._settings.connect('changed::url', () => {
this._update();
});
this._settings.connect('changed::units', () => {
this._update();
});
};
disable() {
if (this._timeout) {
GLib.Source.remove(this._timeout);
this._timeout = null;
}
this._indicator.destroy();
this._indicator = null;
this._settings = null;
};
_getIcon(name) {
const iconDir = `${this.path}/icons/`;
return Gio.icon_new_for_string(`${iconDir}${name}.svg`);
};
_update() {
//console.log("nightscout-follower: updating...")
// Watch for changes to a specific setting
this._fetch((status, data) => {
if (typeof data === 'undefined') {
this._label.set_text("No Data");
return;
}
let entry = data[0];
//console.log("nightscout-follower entry: ", entry);
if (typeof entry === 'undefined') {
this._label.set_text("No Data");
return;
}
let units = this._settings.get_string('units');
let glucoseValue = entry.sgv;
let directionValue = entry.direction;
let delta = entry.delta;
let date = entry.date;
let displayGlucoseValue = glucoseValue;
let displayDelta = delta;
if (units === 'mmol/L') {
displayGlucoseValue /= 18.018;
displayGlucoseValue = displayGlucoseValue.toFixed(1);
displayDelta /= 18.018;
displayDelta = displayDelta.toFixed(2);
}
let elapsedSec = Math.floor((Date.now() - date) / 1000);
let elapsedMin = Math.floor(elapsedSec / 60);
let arrow = this._fromNameToArrowCharacter(directionValue);
let text = `${displayGlucoseValue} ${arrow}`;
if (elapsedSec >= 600) {
this._label.style_class = 'expired-data';
this._notify({
title: _('Missing readings'),
body: _('There have been no new readings since %d minutes ago'.format(elapsedMin)),
});
} else {
this._label.style_class = 'fresh-data';
}
if (glucoseValue < 80) {
this._label.style_class = 'low-glucose';
this._notify({
title: _('Blood glucose is low!'),
body: _('Your glucose is now %d %s'.format(displayGlucoseValue, units)),
});
} else if (glucoseValue > 180) {
this._label.style_class = 'high-glucose';
this._notify({
title: _('Blood glucose is high!'),
body: _('Your glucose is now %d %s'.format(displayGlucoseValue, units)),
});
} else {
this._label.style_class = 'fresh-data';
}
if (delta >= 10) {
this._notify({
title: _('Blood glucose rising quickly'),
body: _('Your glucose has risen %d %s since the last reading'.format(displayDelta, units)),
});
} else if (delta <= -10) {
this._notify({
title: _('Blood glucose falling quickly'),
body: _('Your glucose has fallen %d %s since the last reading'.format(displayDelta, units)),
});
}
this._label.set_text(text);
})
};
_fetch(callback) {
if (this._httpSession === null) {
this._httpSession = new Soup.Session();
}
let settingsUrl = GLib.Uri.parse(this._settings.get_string('url'), GLib.UriFlags.NONE)
let jsonUrl = GLib.Uri.build(
GLib.UriFlags.ENCODED,
settingsUrl.get_scheme(),
settingsUrl.get_userinfo(),
settingsUrl.get_host(),
settingsUrl.get_port(),
'/api/v1/entries.json',
'count=1' + (settingsUrl.get_query() ? '&' + settingsUrl.get_query() : ''),
settingsUrl.get_fragment(),
);
//console.log("nightscout-follower url: " + jsonUrl.to_string());
//this._httpSession.set_proxy_resolver(new Gio.ProxyResolver())
const message = new Soup.Message({
method: 'GET',
uri: jsonUrl,
});
return this._httpSession.send_and_read_async(message, GLib.PRIORITY_DEFAULT, null, (session, result) => {
//console.log("nightscout-follower response status: " + message.get_status());
if (message.get_status() === Soup.Status.OK) {
let bytes = session.send_and_read_finish(result);
let decoder = new TextDecoder('utf-8');
let response = decoder.decode(bytes.get_data());
//console.log(`Response: ${response}`);
let data;
try {
data = JSON.parse(response);
} catch (err) {
console.log("nightscout-follower error: ", err)
return;
}
callback(message.get_status(), data);
} else if (message.get_status() === Soup.Status.UNAUTHORIZED) {
this._notify({
title: _('Nightscout Extension'),
body: _('Unable to retrieve data: authorization failed'),
callback: () => { this.openPreferences() },
});
} else {
Main.notify('Nightscout Extension', _('Unable to retrieve data: please check your internet connection'));
}
});
};
_notify({title, body, callback}) {
const notification = new MessageTray.Notification({
source: this._systemSource,
title: title,
body: body,
//gicon: new Gio.ThemedIcon({name: 'dialog-warning'}),
//iconName: 'dialog-warning',
gicon: this._getIcon("nightscout-icon"),
urgency: MessageTray.Urgency.NORMAL,
});
if (typeof(callback) === 'function') {
notification.connect('activated', _notification => {
callback();
});
}
this._systemSource.addNotification(notification);
};
_fromNameToArrowCharacter(directionValue) {
switch (directionValue) {
case "DoubleDown":
return "⇊";
case "DoubleUp":
return "⇈";
case "Flat":
return "→";
case "FortyFiveDown":
return "↘";
case "FortyFiveUp":
return "↗";
case "SingleDown":
return "↓";
case "SingleUp":
return "↑";
case "TripleDown":
return "⇊";
case "TripleUp":
return "⇈";
default:
return "";
}
};
}

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{
"name": "Nightscout Follower",
"description": "Display blood glucose data from Nightscout",
"uuid": "nightscout-follower@treehouse.org.za",
"settings-schema": "org.gnome.shell.extensions.nightscout-follower",
"gettext-domain": "gnome-shell-extension-nightscout-follower",
"shell-version": [
"46"
]
}

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import Gio from 'gi://Gio';
import Adw from 'gi://Adw';
import Gtk from 'gi://Gtk';
import {ExtensionPreferences, gettext as _} from 'resource:///org/gnome/Shell/Extensions/js/extensions/prefs.js';
export default class NightscoutPreferences extends ExtensionPreferences {
fillPreferencesWindow(window) {
window._settings = this.getSettings();
// Create a preferences page, with a single group
const page = new Adw.PreferencesPage();
window.add(page);
const group = new Adw.PreferencesGroup({
title: _('Settings'),
});
page.add(group);
const url_row = new Adw.EntryRow({
title: _('Nightscout URL'),
});
url_row.set_input_purpose(Gtk.InputPurpose.GTK_INPUT_PURPOSE_URL)
url_row.set_show_apply_button(true);
group.add(url_row);
//window._settings.bind('url', url_row, 'text',
// Gio.SettingsBindFlags.DEFAULT);
url_row.set_text(window._settings.get_string('url'));
url_row.connect('apply', () => {
window._settings.set_string('url', url_row.text);
});
const units = Array('mg/dL', 'mmol/L');
const guint2str = function (unitId) {
return units[unitId];
};
const str2guint = function(unitName) {
return units.indexOf(unitName);
};
const list = Gtk.StringList.new(units);
const units_row = new Adw.ComboRow({
title: _('Units'),
model: list,
});
group.add(units_row);
let unitId = str2guint(window._settings.get_string('units'));
//console.log(unitId);
units_row.set_selected(unitId);
units_row.connect('notify::selected', () => {
let unitName = guint2str(units_row.get_selected());
//console.log(unitName);
window._settings.set_string('units', unitName);
});
};
}

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nightscout-follower@treehouse.org.za/schemas/org.gnome.shell.extensions.nightscout-follower.gschema.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<schemalist>
<schema id="org.gnome.shell.extensions.nightscout-follower" path="/org/gnome/shell/extensions/nightscout-follower/">
<key name="url" type="s">
<default>"https://API_SECRET@sitename.yourprovider.com"</default>
<summary>Nightscout URL</summary>
<description>URL of Nightscout instance (of the form https://API_SECRET@sitename.yourprovider.com)</description>
</key>
<key name="units" type="s">
<default>"mg/dL"</default>
<summary>Measurement units</summary>
<description>Blood glucose measurement units, either mg/dL or mmol/L</description>
</key>
</schema>
</schemalist>

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.expired-data {
text-decoration : line-through;
}
.fresh-data {
text-decoration : none;
}
.low-glucose {
text-decoration : none;
color : #f18c8c;
}
.high-glucose {
text-decoration : none;
color : #fbf484;
}

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#!/usr/bin/env sh
cd nightscout-follower@treehouse.org.za || exit 1
pot="gnome-shell-extension-nightscout-follower.pot"
touch "$pot"
xgettext -j ./*.js -o "$pot" --from-code UTF-8 --no-wrap
xgettext -j schemas/*.xml -o "$pot" --from-code UTF-8 --no-wrap
for po in locale/*; do
echo "$po"
msgmerge --backup=off -U "$po" "$pot"
done
rm "$pot"