From 348cb6f42636d4fa1349e017052ed1fee179b362 Mon Sep 17 00:00:00 2001
From: Maximilian Richt <maxi@richt.name>
Date: Thu, 24 Aug 2023 23:35:51 +0200
Subject: [PATCH] initial commit

---
 .gitignore                |  1 +
 README.md                 |  6 +++
 go.mod                    |  3 ++
 main.go                   | 95 +++++++++++++++++++++++++++++++++++++++
 static/style.css          |  6 +++
 templates/index.html.tmpl | 15 +++++++
 6 files changed, 126 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 go.mod
 create mode 100644 main.go
 create mode 100644 static/style.css
 create mode 100644 templates/index.html.tmpl

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f2d43de
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+matelight-publiccontrol
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b3d1af9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+matelight public control
+========================
+
+This is a simple web interface to control the [matelight](https://wiki.temporaerhaus.de/matelight) installation at the [temporaerhaus](https://temporaerhaus.de/) through the outside window.
+
+It requires the WLED host and the PORT it should run on. You can provide them as environment variables `WLED_HOST` and `PORT` or as command line arguments `--wled-host` and `--port`.
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..73e34f1
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/temporaerhaus/matelight-publiccontrol
+
+go 1.21.0
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..bf0d0ba
--- /dev/null
+++ b/main.go
@@ -0,0 +1,95 @@
+package main
+
+import (
+	"bytes"
+	"embed"
+	"encoding/json"
+	"flag"
+	"html/template"
+	"log"
+	"math/rand"
+	"net/http"
+	"os"
+)
+
+//go:embed templates
+var indexHTML embed.FS
+
+//go:embed static
+var staticFiles embed.FS
+
+func main() {
+	port := flag.String("port", os.Getenv("PORT"), "port to serve on")
+	wledHost := flag.String("wled-host", os.Getenv("WLED_HOST"), "WLED host")
+	flag.Parse()
+	if *port == "" {
+		*port = "3000"
+	}
+	if *wledHost == "" {
+		log.Fatal("WLED_HOST is required")
+	}
+
+	// Note the call to ParseFS instead of Parse
+	t, err := template.ParseFS(indexHTML, "templates/index.html.tmpl")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// http.FS can be used to create a http Filesystem
+	var staticFS = http.FS(staticFiles)
+	fs := http.FileServer(staticFS)
+
+	// Serve static files
+	http.Handle("/static/", fs)
+
+	// Handle only the root path
+	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+		var path = req.URL.Path
+		if path != "/" {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+
+		w.Header().Add("Content-Type", "text/html")
+
+		// respond with the output of template execution
+		t.Execute(w, struct {
+			Title    string
+			Response string
+		}{Title: "hello", Response: path})
+	})
+	http.HandleFunc("/random", func(w http.ResponseWriter, req *http.Request) {
+		effect := rand.Intn(5) + 1
+
+		obj := map[string]int{"ps": effect}
+		json, err := json.Marshal(obj)
+		if err != nil {
+			return
+		}
+
+		// log the request
+		log.Println(string(json))
+
+		// post to wled
+		client := &http.Client{}
+		response, err := client.Post(*wledHost+"/json/state", "application/json", bytes.NewBuffer(json))
+		if err != nil {
+			log.Println(err)
+
+			w.Header().Add("Location", "/")
+			w.WriteHeader(http.StatusFound)
+			return
+		}
+		defer response.Body.Close()
+
+		// redirect to home
+		w.Header().Add("Location", "/")
+		w.WriteHeader(http.StatusFound)
+	})
+
+	log.Println("Listening on port", *port)
+	err = http.ListenAndServe(":"+*port, nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/static/style.css b/static/style.css
new file mode 100644
index 0000000..cccb7e6
--- /dev/null
+++ b/static/style.css
@@ -0,0 +1,6 @@
+body {
+    font-family: sans-serif;
+}
+button {
+    font-size: 200%;
+}
\ No newline at end of file
diff --git a/templates/index.html.tmpl b/templates/index.html.tmpl
new file mode 100644
index 0000000..d8acf62
--- /dev/null
+++ b/templates/index.html.tmpl
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8" />
+<title>matelight</title>
+<link rel="stylesheet" href="/static/style.css" />
+</head>
+<body>
+<h1>matelight</h1>
+<p>das <em>matelight</em> des <a href="https://temporaerhaus.de">temporärhaus</a> besteht aus Kästen von <a href="https://de.wikipedia.org/wiki/Club-Mate">Club-Mate</a>, einer in <a href="https://de.wikipedia.org/wiki/Hackerspace">Hack- und Makespaces</a> verbreitete <a href="https://de.wikipedia.org/wiki/Mate-Tee">Mate-Tee</a>-Limonade und darin verbauter LEDs, die über <a href="https://wled.me">WLED</a> angesteuert werden.</p>
+<form action="/random" method="post">
+    <button type="submit">Anderer Effekt!</button>
+</form>
+</body>
+</html>
\ No newline at end of file