From f0cd88f3fc35175294ffdb45bfa3bfff1de5137e Mon Sep 17 00:00:00 2001
From: s3lph <account-gitlab-ideynizv@kernelpanic.lol>
Date: Tue, 3 Mar 2020 22:10:41 +0100
Subject: [PATCH 1/2] Add Prometheus-style metrics

---
 matemat/webserver/pagelets/__init__.py |  1 +
 matemat/webserver/pagelets/metrics.py  | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 matemat/webserver/pagelets/metrics.py

diff --git a/matemat/webserver/pagelets/__init__.py b/matemat/webserver/pagelets/__init__.py
index 629cd5f..96b8234 100644
--- a/matemat/webserver/pagelets/__init__.py
+++ b/matemat/webserver/pagelets/__init__.py
@@ -11,6 +11,7 @@ from .touchkey import touchkey_page
 from .buy import buy
 from .deposit import deposit
 from .admin import admin
+from .metrics import metrics
 from .moduser import moduser
 from .modproduct import modproduct
 from .userbootstrap import userbootstrap
diff --git a/matemat/webserver/pagelets/metrics.py b/matemat/webserver/pagelets/metrics.py
new file mode 100644
index 0000000..62206ed
--- /dev/null
+++ b/matemat/webserver/pagelets/metrics.py
@@ -0,0 +1,23 @@
+from bottle import abort, response, route
+
+from matemat.db import MatematDatabase
+from matemat.webserver.config import get_app_config
+
+
+@route('/metrics')
+def metrics():
+    config = get_app_config()
+    if config.get('MetricsEnabled', '0') != '1':
+        return abort(403,
+                     'Prometheus metrics are disable in configuration. '
+                     'If you believe this is an error, contact your administrator.')
+    with MatematDatabase(config['DatabaseFile']) as db:
+        products = db.list_products()
+    m = '''# TYPE matemat_beverage_supply_count gauge
+# HELP matemat_beverage_supply_count Number of bottles available
+'''
+    for product in products:
+        name = product.name.replace('"', '\\"')
+        m += f'matemat_beverage_supply_count{{product="{name}"}} {product.stock}\n'
+    response.headers['Content-Type'] = 'text/plain'
+    return m

From 669be9c9e4ae5a6a1cb8c836d003ff0c052350b3 Mon Sep 17 00:00:00 2001
From: s3lph <account-gitlab-ideynizv@kernelpanic.lol>
Date: Tue, 3 Mar 2020 22:15:43 +0100
Subject: [PATCH 2/2] Prepare release v0.2.4

---
 CHANGELOG.md                          | 13 +++++++++++++
 matemat/__init__.py                   |  2 +-
 package/archlinux/PKGBUILD            |  2 +-
 package/debian/matemat/DEBIAN/control |  2 +-
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3569157..ecf0cf5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Matemat Changelog
 
+<!-- BEGIN RELEASE v0.2.4 -->
+## Version 0.2.4
+
+Feature release
+
+### Changes
+
+<!-- BEGIN CHANGES 0.2.4 -->
+- Feature: Quick-and-dirty Prometheus metrics exporter
+<!-- END CHANGES 0.2.4 -->
+
+<!-- END RELEASE v0.2.4 -->
+
 <!-- BEGIN RELEASE v0.2.3 -->
 ## Version 0.2.3
 
diff --git a/matemat/__init__.py b/matemat/__init__.py
index 12dad7e..5e42c43 100644
--- a/matemat/__init__.py
+++ b/matemat/__init__.py
@@ -1,2 +1,2 @@
 
-__version__ = '0.2.3'
+__version__ = '0.2.4'
diff --git a/package/archlinux/PKGBUILD b/package/archlinux/PKGBUILD
index 68994c7..e41b2e1 100644
--- a/package/archlinux/PKGBUILD
+++ b/package/archlinux/PKGBUILD
@@ -2,7 +2,7 @@
 # Maintainer: s3lph <account-gitlab-ideynizv@kernelpanic.lol>
 
 pkgname=matemat
-pkgver=0.2.3
+pkgver=0.2.4
 pkgrel=1
 arch=('any')
 
diff --git a/package/debian/matemat/DEBIAN/control b/package/debian/matemat/DEBIAN/control
index ad4b86d..43e9faa 100644
--- a/package/debian/matemat/DEBIAN/control
+++ b/package/debian/matemat/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: matemat
-Version: 0.2.3
+Version: 0.2.4
 Maintainer: s3lph <account-gitlab-ideynizv@kernelpanic.lol>
 Section: web
 Priority: optional