Prometheus is now here

backend/TODO

@@ -1 +1,2 @@
-* implement a way to store current unsolved puzzle
+* implement a way to store current unsolved puzzle
+* check that solved api call uuid is found in the seen list 

backend/go.mod

@@ -9,15 +9,24 @@ require (
 
 require (
 	github.com/ahmed-debbech/go_chess_puzzle v0.0.0-20241227112814-7e4e3e6b89a8 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
-	github.com/klauspost/compress v1.13.6 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/notnil/chess v1.9.0 // indirect
+	github.com/prometheus/client_golang v1.20.5 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/common v0.55.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
 	github.com/xdg-go/scram v1.1.2 // indirect
 	github.com/xdg-go/stringprep v1.0.4 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
 	golang.org/x/crypto v0.26.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
 	golang.org/x/text v0.17.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
 )

backend/go.sum

@@ -7,14 +7,30 @@ github.com/ahmed-debbech/go_chess_puzzle/generator v0.0.0-20250103134145-8e8a8af
 github.com/ahmed-debbech/go_chess_puzzle/generator v0.0.0-20250109214724-6b0c7875d733 h1:IPoZo5TpbPFc3/gGnyJzyx7B8GwcdTPK71vpS0rh4YM=
 github.com/ahmed-debbech/go_chess_puzzle/generator v0.0.0-20250109214724-6b0c7875d733/go.mod h1:h7rdtIN/l62JTh9v0VGX+l62NmKpOceGWZcgNeTUbn0=
 github.com/ajstarks/svgo v0.0.0-20200320125537-f189e35d30ca/go.mod h1:K08gAheRH3/J6wwsYMMT4xOr94bZjxIelGM0+d/wbFw=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
 github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/klauspost/compress v1.13.6 h1:P76CopJELS0TiO2mebmnzgWaajssP/EszplttgQxcgc=
 github.com/klauspost/compress v1.13.6/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/montanaflynn/stats v0.7.1 h1:etflOAAHORrCC44V+aR6Ftzort912ZU+YLiSTuV8eaE=
 github.com/montanaflynn/stats v0.7.1/go.mod h1:etXPPgVO6n31NxCd9KQUMvCM+ve0ruNzt6R8Bnaayow=
+github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
+github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/notnil/chess v1.9.0 h1:YMxR5kUVjtwcuFptGU0/3q7eG3MSHQNbg0VUekvRKV0=
 github.com/notnil/chess v1.9.0/go.mod h1:cRuJUIBFq9Xki05TWHJxHYkC+fFpq45IWwk94DdlCrA=
+github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
+github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
+github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
+github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
+github.com/prometheus/common v0.55.0 h1:KEi6DK7lXW/m7Ig5i47x0vRzuBsHuvJdi5ee6Y3G1dc=
+github.com/prometheus/common v0.55.0/go.mod h1:2SECS4xJG1kd8XF9IcM1gMX6510RAEL65zxzNImwdc8=
+github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
+github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
 github.com/xdg-go/pbkdf2 v1.0.0 h1:Su7DPu48wXMwC3bs7MCNG+z4FhcyEuz5dlvchbq0B0c=
 github.com/xdg-go/pbkdf2 v1.0.0/go.mod h1:jrpuAogTd400dnrH08LKmI/xc1MbPOebTwRqcT5RDeI=
 github.com/xdg-go/scram v1.1.2 h1:FHX5I5B4i4hKRVRBCFRxq1iQRej7WO3hhBuJf+UUySY=
@@ -43,6 +59,8 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
+golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -55,3 +73,5 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=

backend/logic/puzzles.go

@@ -3,6 +3,7 @@ package logic
 import (
 	"errors"
 	"github.com/ahmed-debbech/go_chess_puzzle/backend/mongo"
+	"github.com/ahmed-debbech/go_chess_puzzle/backend/prometheus"
 )
 
 
@@ -12,6 +13,7 @@ func GetRandomPuzzle() (*PuzzleDto, error){
 		return &PuzzleDto{}, errors.New("Could not find a random puzzle.")
 	}
 	pdto := fromPuzzleDao(dat)
+	go prometheus.Publish("load")
 	return pdto, nil
 }
 
@@ -25,8 +27,10 @@ func PuzzleToJson(puzzle PuzzleDto) ([]byte, error){
 
 func IncrementSolvedCounter(puzzleId string) {
 	mongo.IncrementSolved(puzzleId)
+	go prometheus.Publish("solved")
 }
 
 func MarkPuzzleAsSeen(pid string, uuid string){
 	mongo.MarkAsSeen(pid, uuid)
+	go prometheus.Publish("seen")
 }

backend/main.go

@@ -7,9 +7,12 @@ import (
 	"io/fs"
 	_"time"
 	"errors"
+	"log"
 
 	"github.com/ahmed-debbech/go_chess_puzzle/backend/logic"
 	"github.com/ahmed-debbech/go_chess_puzzle/backend/ramstore"
+	"github.com/ahmed-debbech/go_chess_puzzle/backend/prometheus"
+
 )
 
 //go:embed views/*.html
@@ -95,9 +98,17 @@ func seenHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func rootHandle(w http.ResponseWriter, r *http.Request) {
+	if r.URL.Path != "/" {
+		w.WriteHeader(http.StatusNotFound)
+		p := loadPage("404.html")
+		fmt.Fprintf(w, string(p.Body))
+		return
+	}
+
 	p := loadPage("index.html")
 	if p == nil { return }
 
+	go prometheus.Publish("root")
 	fmt.Fprintln(w,string(p.Body))
 }
 
@@ -106,7 +117,6 @@ func main(){
 	fmt.Println("Hello world")
 
 	logic.ConnectDb()
-	defer logic.StopDb()
 
     staticFiles, _ := fs.Sub(assets, "views/assets")
 
@@ -122,5 +132,11 @@ func main(){
 	http.HandleFunc("/solved", solvedHandler)
 	http.HandleFunc("/seen", seenHandler)
 
-    fmt.Println(http.ListenAndServe(":5530", nil))
+    go func() {
+		log.Fatal(http.ListenAndServe(":5530", nil))
+	}()
+	go func() {
+		log.Fatal(prometheus.BuildServer())
+	}()
+	for {}
 }

backend/prometheus/exporter.go

@@ -0,0 +1,87 @@
+package prometheus
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+var (
+	totalRequests = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "backend_total_hits",
+			Help: "Number of get requests to /",
+		},
+		[]string{"value"},
+	)
+	totalLoad = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "backend_total_load",
+			Help: "Number of get requests to /load that get puzzle from MongoDb",
+		},
+		[]string{"value"},
+	)
+	totalSeen = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "backend_total_seen",
+			Help: "Number of seen on puzzles",
+		},
+		[]string{"value"},
+	)
+	totalSolved = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "backend_total_solved",
+			Help: "Number of people solved the puzles",
+		},
+		[]string{"value"},
+	)
+)
+
+var (
+	root = make(chan int, 1000)
+	load = make(chan int, 1000)
+	seen = make(chan int, 1000)
+	solved = make(chan int, 1000)
+)
+
+func Publish(ack_type string){
+	switch ack_type {
+	case "root":
+		root <- 1
+	case "load":
+		load <- 1
+	case "seen":
+		seen <- 1
+	case "solved":
+		solved <- 1
+	}
+}
+
+func ExecLoop(){
+	for{
+		select {
+		case  _= <- root:
+			totalRequests.WithLabelValues("value").Inc()
+		case  _= <- load:
+			totalLoad.WithLabelValues("value").Inc()
+		case  _= <- seen:
+			totalSeen.WithLabelValues("value").Inc()
+		case  _= <- solved:
+			totalSolved.WithLabelValues("value").Inc()
+		}
+	}
+}
+
+func BuildServer() error{
+
+	prometheus.MustRegister(totalRequests)
+	prometheus.MustRegister(totalLoad)
+	prometheus.MustRegister(totalSeen)
+	prometheus.MustRegister(totalSolved)
+
+	go ExecLoop()
+
+	http.Handle("/metrics", promhttp.Handler())
+	return http.ListenAndServe("localhost:22211", nil)
+}

backend/views/404.html

@@ -0,0 +1,77 @@
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta content="width=device-width, initial-scale=1, maximum-scale=1, shrink-to-fit=no" name="viewport">
+    <title>404 — Stisla</title>
+
+    <!-- General CSS Files -->
+    <link rel="stylesheet" href="assets/modules/bootstrap/css/bootstrap.min.css">
+    <link rel="stylesheet" href="assets/modules/fontawesome/css/all.min.css">
+
+    <!-- CSS Libraries -->
+
+    <!-- Template CSS -->
+    <link rel="stylesheet" href="assets/css/style.css">
+    <link rel="stylesheet" href="assets/css/components.css">
+    <!-- Start GA -->
+    <script type="text/javascript" async="" src="https://www.google-analytics.com/analytics.js"></script>
+    <script async="" src="https://www.googletagmanager.com/gtag/js?id=UA-94034622-3"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+
+        function gtag() {
+            dataLayer.push(arguments);
+        }
+        gtag('js', new Date());
+
+        gtag('config', 'UA-94034622-3');
+    </script>
+    <!-- /END GA -->
+</head>
+
+<body class="sidebar-gone">
+    <div id="app">
+        <section class="section">
+            <div class="container mt-5">
+                <div class="page-error">
+                    <div class="page-inner">
+                        <h1>404</h1>
+                        <div class="page-description">
+                            The page you were looking for could not be found.
+                        </div>
+                        <div class="page-search">
+
+                            <div class="mt-3">
+                                <a href="/">Back to Home</a>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                <div class="simple-footer mt-5">
+                    Copyright © Pichess 2025
+                </div>
+            </div>
+        </section>
+    </div>
+
+    <!-- General JS Scripts -->
+    <script src="assets/modules/jquery.min.js"></script>
+    <script src="assets/modules/popper.js"></script>
+    <script src="assets/modules/tooltip.js"></script>
+    <script src="assets/modules/bootstrap/js/bootstrap.min.js"></script>
+    <script src="assets/modules/nicescroll/jquery.nicescroll.min.js"></script>
+    <script src="assets/modules/moment.min.js"></script>
+    <script src="assets/js/stisla.js"></script>
+
+    <!-- JS Libraies -->
+
+    <!-- Page Specific JS File -->
+
+    <!-- Template JS File -->
+    <script src="assets/js/scripts.js"></script>
+    <script src="assets/js/custom.js"></script>
+
+</body>
+
+</html>