upload support for new images

* Move namegen to seperate file
* Simplify Makefile

Makefile

@@ -1,7 +1,10 @@
-#         livereload: github.com/omeid/go-livereload/cmd/livereload@v0.0.0-20180903043807-18d58b752b26
+
 livereload:
-	livereload . &
+	go run github.com/omeid/go-livereload/cmd/livereload@latest web | ts
 
-server:
+devserver:
-	python3 -m http.server 8082 &
+	go run . --dev --images-dir w.tmp/images --collages-dir w.tmp
 
+update_croppie:
+	curl -Lo web/croppie.min.js https://github.com/Foliotek/Croppie/raw/v2.6.5/croppie.min.js
+	curl -Lo web/croppie.css https://github.com/Foliotek/Croppie/raw/v2.6.5/croppie.css

README.md

@@ -0,0 +1,2 @@
+
+# Collage Maker

cmd/run.go

@@ -1,56 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"os"
-
-	"go.balki.me/collage-maker/collage"
-)
-
-func main() {
-	req := collage.Request{}
-	/*
-			reqStr := []byte(`
-		{
-		  "background_image": "",
-		  "aspect": { "width": 4224, "height": 3264 },
-		  "dimension": { "width": 1187, "height": 848 },
-		  "photos": [
-			{
-			  "image": "img1.jpg",
-			  "crop": {
-				"start": { "x": 419, "y": 667 },
-				"end": { "x": 2707, "y": 3389 }
-			  },
-			  "frame": {
-				"start": { "x": 0, "y": 0 },
-				"end": { "x": 712, "y": 848 }
-			  }
-			},
-			{
-			  "image": "img2.jpg",
-			  "crop": {
-				"start": { "x": 331, "y": 44 },
-				"end": { "x": 1132, "y": 1468 }
-			  },
-			  "frame": {
-				"start": { "x": 712, "y": 0 },
-				"end": { "x": 1187, "y": 848 }
-			  }
-			}
-		  ]
-		}
-		`)
-	*/
-	// {"background_image":"","aspect":{"width":4224,"height":3264},"dimension":{"width":1187,"height":848},"photos":[{"image":"img1.jpg","crop":{"start":{"x":528,"y":3},"end":{"x":2696,"y":2583}},"frame":{"start":{"x":0,"y":0},"end":{"x":712,"y":848}}},{"image":"img2.jpg","crop":{"start":{"x":410,"y":0},"end":{"x":1014,"y":1074}},"frame":{"start":{"x":712,"y":0},"end":{"x":1187,"y":848}}}]}
-	reqStr := []byte(`
-{"background_image":"","aspect":{"width":4224,"height":3264},"dimension":{"width":1097,"height":848},"photos":[{"image":"img1.jpg","crop":{"start":{"x":448,"y":595},"end":{"x":2721,"y":3560}},"frame":{"start":{"x":0,"y":0},"end":{"x":649,"y":848}}},{"image":"img2.jpg","crop":{"start":{"x":418,"y":1},"end":{"x":1022,"y":1180}},"frame":{"start":{"x":665,"y":0},"end":{"x":1098,"y":848}}}]}
-`)
-	err := json.Unmarshal(reqStr, &req)
-	fmt.Println(err)
-	out, err := os.Create("./collage.jpg")
-	fmt.Println(err)
-	err = collage.Make(req, os.DirFS("."), out)
-	fmt.Println(err)
-}

collage/collage.go

@@ -48,7 +48,7 @@ type Request struct {
 	Photos          []Photo   `json:"photos"`
 }
 
-func Make(req Request, source fs.FS, output io.Writer) error {
+func Make(req *Request, source fs.FS, output io.Writer) error {
 	rec := image.Rect(0, 0, int(req.Aspect.Width), int(req.Aspect.Height))
 	canvas := image.NewRGBA64(rec)
 	white := color.RGBA{255, 255, 255, 255}

collage/collage_test.go

@@ -67,7 +67,7 @@ func TestMake(t *testing.T) {
 		t.Fatalf("failed to create ouput image file %v", err)
 	}
 
-	err = Make(req, testDataFS, out)
+	err = Make(&req, testDataFS, out)
 	if err != nil {
 		t.Fatalf("failed to make collage %v", err)
 	}
@@ -104,17 +104,6 @@ func TestCrop(t *testing.T) {
 	if string(refImgPrefix) != croppedImgPrefix {
 		t.Fatalf("Cropped image is not the same as reference image")
 	}
-	// SavePrefix(cropped)
-	// expectedImage, err := GetImage(testDataFS, "test_output.jpg")
-	// if err != nil {
-	// 	t.Fatalf("failed to get reference crop image %v", err)
-	// }
-	// fmt.Printf("%v\n", cropped)
-	// fmt.Printf("%v\n", expectedImage)
-	// if fmt.Sprintf("%#v", cropped) != fmt.Sprintf("%#v", expectedImage) {
-	// 	t.Fatalf("Cropped image is not the same as reference image")
-	// }
-	// SaveImage(cropped)
 }
 
 // Save first 1000 bytes of string representation to compare against reference

dummy.txt

@@ -1 +0,0 @@
-hello world

go.mod

@@ -3,7 +3,7 @@ module go.balki.me/collage-maker
 go 1.21
 
 require (
-	github.com/oliamb/cutter v0.2.2
+	go.balki.me/anyhttp v0.3.0
 	go.oneofone.dev/resize v1.0.1
 )
 

go.sum

@@ -1,6 +1,6 @@
-github.com/oliamb/cutter v0.2.2 h1:Lfwkya0HHNU1YLnGv2hTkzHfasrSMkgv4Dn+5rmlk3k=
-github.com/oliamb/cutter v0.2.2/go.mod h1:4BenG2/4GuRBDbVm/OPahDVqbrOemzpPiG5mi1iryBU=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+go.balki.me/anyhttp v0.3.0 h1:WtBQ0rnkg567sX/O4ij/+qBbdCIUt5VURSe718sITBY=
+go.balki.me/anyhttp v0.3.0/go.mod h1:JhfekOIjgVODoVqUCficjpIgmB3wwlB7jhN0eN2EZ/s=
 go.oneofone.dev/resize v1.0.1 h1:HjpVar/4pxMGrjO44ThaMX1Q5UOBw0KxzbxxRDZPQuA=
 go.oneofone.dev/resize v1.0.1/go.mod h1:zGFmn7q4EUZVlnDmxqf+b0mWpxsTt0MH2yx6ng8tpq0=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=

index.html

@@ -1,86 +0,0 @@
-<!DOCTYPE html>
-<html>
-    <head>
-        <link rel="stylesheet" href="croppie.css" />
-        <link rel="icon" href="data:;base64,iVBORw0KGgo=" />
-        <script src="http://localhost:35729/livereload.js"></script>
-        <script src="croppie.js"></script>
-        <script src="index.js"></script>
-        <!--
-            width: 3264px;
-            height: 4224px;
-            width: 8.5in;
-            height: 11in;
-        -->
-        <style>
-            .image-surface {
-                overflow: hidden;
-                margin: auto;
-                background-color: lightgreen;
-            }
-            .imagebox {
-                grid-area: image;
-                display:flex;
-                align-items: center;
-                justify-content: center;
-                padding: 50px;
-                flex: 70%;
-            }
-            .container {
-                display: flex;
-                background-color: lightyellow;
-                height: calc(100vh - 20px);
-            }
-            .controls {
-                background-color: lightgrey;
-                display: flex;
-                grid-area: controls;
-                align-items: center;
-                justify-content: center;
-                flex: 30%;
-            }
-            .showbuton {
-                font-size: 2rem;
-            }
-            .letter-portrait {
-                height: 100%;
-                aspect-ratio: 85 / 110;
-            }
-            .letter-portrait .collage-img {
-                height: 50%;
-            }
-            .letter-landscape-2 {
-                display:flex;
-                // width: 80vh;
-                height: 100%;
-                // margin: auto;
-                aspect-ratio: 110 / 85;
-                // aspect-ratio: 7 / 5;
-                gap: 1rem;
-            }
-            .letter-landscape-2 .img1 {
-                flex: 60%;
-            }
-            .letter-landscape-2 .img2 {
-                flex: 40%;
-            }
-        </style>
-    </head>
-    <body onload="main()">
-        <div class="container">
-            <div class="controls">
-                <button class="showbuton" onClick="snap()">Snap Collage</button>
-            </div>
-            <div class="imagebox">
-            <div id="collage" class="image-surface letter-landscape-2">
-                <div class="collage-img img1" data-collage-image-url="img1.jpg">
-                    <!-- <img src="img1.jpg"> -->
-                </div>
-                <div class="collage-img img2" data-collage-image-url="img2.jpg">
-                    <!-- <img src="img2.jpg"> -->
-                </div>
-            </div>
-            </div>
-        </div>
-    </body>
-</html>

index.js

@@ -1,107 +0,0 @@
-
-function main() {
-    initCollage("collage")
-}
-
-function makeCroppieElem(elem, imgUrl) {
-    cpie = new Croppie(elem, {
-        viewport: {
-            width: elem.clientWidth,
-            height: elem.clientHeight,
-            type: 'square'
-        },
-        showZoomer: false,
-    });
-
-    cpie.bind({
-        url: imgUrl
-    });
-
-    return cpie
-
-}
-
-// collage state
-
-var collageDivId;
-var crops = [];
-
-function initCollage(divId) {
-    collageDivId = divId
-    const collageDiv = document.getElementById(collageDivId)
-    for(elem of collageDiv.getElementsByClassName("collage-img")) {
-        const cpie = makeCroppieElem(elem, elem.dataset.collageImageUrl)
-        const lastLen = crops.push(cpie)
-        elem.dataset.collageCropieIndex = lastLen - 1
-    }
-}
-
-function showCrop() {
-    for(cpie of crops) {
-        console.log(cpie.get())
-        console.log(cpie.element.clientWidth)
-        console.log(cpie.element.clientHeight)
-    }
-}
-
-async function ip() {
-    const resp = await fetch("dummy.txt")
-    console.log(await resp.text())
-}
-
-function snap() {
-    const collageDiv = document.getElementById(collageDivId)
-    col = collageDiv.offsetLeft;
-    cot = collageDiv.offsetTop;
-    console.log("----------------------")
-    req = {
-        background_image: "",
-        aspect: {
-            width: 528 * 4 * 2,
-            height: 816 * 4,
-        },
-        dimension: {
-            width: collageDiv.clientWidth,
-            height: collageDiv.clientHeight,
-        },
-        photos: [],
-    };
-
-    for(elem of collageDiv.getElementsByClassName("collage-img")) {
-        const cpie = crops[elem.dataset.collageCropieIndex]
-        // console.log(cpie.get().points)
-        // console.log(elem.offsetLeft - col)
-        // console.log(elem.offsetTop - cot)
-        // console.log(elem.clientWidth)
-        // console.log(elem.clientHeight)
-        const fsx = elem.offsetLeft - col
-        const fsy = elem.offsetTop - cot
-        const [sx, sy, ex, ey] = cpie.get().points;
-        const photo = {
-            image: elem.dataset.collageImageUrl,
-            crop: {
-                start: {
-                    x: parseInt(sx),
-                    y: parseInt(sy),
-                },
-                end: {
-                    x: parseInt(ex),
-                    y: parseInt(ey),
-                },
-            },
-            frame: {
-                start: {
-                    x: fsx,
-                    y: fsy,
-                },
-                end: {
-                    x: fsx + elem.clientWidth,
-                    y: fsy + elem.clientHeight,
-                },
-            },
-        };
-        req.photos.push(photo)
-    }
-    console.log(JSON.stringify(req));
-    ip()
-}

main.go

@@ -1,99 +1,188 @@
 package main
 
 import (
+	"bytes"
+	"context"
+	"embed"
+	"encoding/json"
+	"flag"
 	"fmt"
-	"image"
+	"io"
-	"image/draw"
+	"io/fs"
-	"image/jpeg"
+	"net/http"
 	"os"
+	"path"
+	"regexp"
+	"time"
 
-	"github.com/oliamb/cutter"
+	"log/slog"
-	"go.oneofone.dev/resize"
+
+	"go.balki.me/anyhttp"
+	"go.balki.me/anyhttp/idle"
+	"go.balki.me/collage-maker/collage"
 )
 
-/**
+var (
-"431"
+	imagesDir      string
-"697"
+	collageDir     string
-"2514"
+	devMode        bool
-"2047"
+	collageNameGen *nameGen
-zoom: 0.392
+	imagesDirFs    fs.FS
-816
+	listenAddr     string
-528
+
--------------
+	//go:embed web
-"153"
+	webFS embed.FS
-"9"
+)
-"1331"
+
-"772"
+const (
-zoom: 0.6949
+	kb = 1024
-816
+	mb = 1024 * kb
-528
+)
-*/
 
 func main() {
-	const width = 816 * 4
+	flag.StringVar(&imagesDir, "images-dir", "images", "Sets the images dir")
-	const height = 528 * 4
+	flag.StringVar(&collageDir, "collages-dir", "collages", "Sets the collages dir")
-	imgFile1, err := os.Open("img1.jpg")
+	flag.BoolVar(&devMode, "dev", false, "Serve local assets during development")
-	if err != nil {
+	flag.StringVar(&listenAddr, "addr", "127.0.0.1:8767", "Web listen address, see https://pkg.go.dev/go.balki.me/anyhttp#readme-address-syntax")
-		fmt.Println(err)
+
-	}
+	flag.Parse()
-	imgFile2, err := os.Open("img2.jpg")
+
-	if err != nil {
+	collageNameGen = NewNameGen()
-		fmt.Println(err)
+	imagesDirFs = os.DirFS(imagesDir)
-	}
+	imagesURLPath := "images"
-	img1, _, err := image.Decode(imgFile1)
+	collagesPath := "collages"
-	if err != nil {
+
-		fmt.Println(err)
+	addFileServer := func(path, dir string) {
-	}
+		httpFileServer := http.FileServer(http.Dir(dir))
-	img2, _, err := image.Decode(imgFile2)
+		http.Handle("/"+path+"/", http.StripPrefix("/"+path, httpFileServer))
-	if err != nil {
-		fmt.Println(err)
 	}
 
-	img1, err = cutter.Crop(img1, cutter.Config{
+	addFileServer(imagesURLPath, imagesDir)
-		Width:  2514 - 431,
+	addFileServer(collagesPath, collageDir)
-		Height: 2047 - 697,
+
-		Anchor: image.Point{431, 697},
+	if devMode {
-		Mode:   cutter.TopLeft, // optional, default value
+		httpFileServer := http.FileServer(http.Dir("web"))
+		http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Add("Cache-Control", "no-cache")
+			httpFileServer.ServeHTTP(w, r)
 		})
-
+	} else {
+		indexModTime := time.Now()
+		indexHTML := func() io.ReadSeeker {
+			indexHTMLContent, err := webFS.ReadFile("web/index.html")
 			if err != nil {
 				panic(err)
 			}
-
+			devOnlyRegex := regexp.MustCompile("\n[^\n]*<!-- DEVONLY[^\n]*")
-	img1 = resize.Resize(width, height, img1, resize.Lanczos3)
+			return bytes.NewReader(devOnlyRegex.ReplaceAllLiteral(indexHTMLContent, nil))
-
+		}()
-	img2, err = cutter.Crop(img2, cutter.Config{
+		httpFileServer := func() http.Handler {
-		Width:  1331 - 153,
+			webrootFs, err := fs.Sub(webFS, "web")
-		Height: 772 - 9,
-		Anchor: image.Point{153, 9},
-		Mode:   cutter.TopLeft, // optional, default value
-	})
-
 			if err != nil {
 				panic(err)
 			}
+			return http.FileServer(http.FS(webrootFs))
+		}()
+		http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+			if r.URL.Path == "/" {
+				http.ServeContent(w, r, "index.html", indexModTime, indexHTML)
+			} else {
+				httpFileServer.ServeHTTP(w, r)
+			}
+		})
+	}
 
-	img2 = resize.Resize(width, height, img2, resize.Lanczos3)
+	http.HandleFunc("/make-collage", func(w http.ResponseWriter, r *http.Request) {
-
+		collageReq := collage.Request{}
-	//starting position of the second image (bottom left)
+		body, err := io.ReadAll(r.Body)
-	//sp2 := image.Point{img1.Bounds().Dx(), 0}
-	//new rectangle for the second image
-	//r2 := image.Rectangle{sp2, sp2.Add(img2.Bounds().Size())}
-	//rectangle for the big image
-	r := image.Rectangle{image.Point{0, 0}, image.Point{width, height + height}}
-	r2 := image.Rectangle{image.Point{0, height + 1}, image.Point{width, height + height}}
-	rgba := image.NewRGBA(r)
-
-	draw.Draw(rgba, img1.Bounds(), img1, image.Point{0, 0}, draw.Src)
-	draw.Draw(rgba, r2, img2, image.Point{0, 0}, draw.Src)
-
-	out, err := os.Create("./output.jpg")
 		if err != nil {
-		fmt.Println(err)
+			slog.Error("failed to read request body", "error", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		if err := json.Unmarshal(body, &collageReq); err != nil {
+			slog.Error("failed to unmarshal json request", "error", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		collageFile, err := MakeCollage(&collageReq)
+		if err != nil {
+			slog.Error("failed to make collage", "error", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		if _, err := w.Write([]byte(collageFile)); err != nil {
+			slog.Error("Failed to write collageFile", "error", err)
+		}
+	})
+	http.HandleFunc("/upload", func(w http.ResponseWriter, r *http.Request) {
+		err := func() error {
+			err := r.ParseMultipartForm(500 * mb)
+			if err != nil {
+				return err
+			}
+			files, ok := r.MultipartForm.File["photos"]
+			if !ok {
+				return fmt.Errorf("photos not found in request")
+			}
+			for i, f := range files {
+				imgFile, err := f.Open()
+				if err != nil {
+					return err
+				}
+				defer imgFile.Close()
+				imagePath := path.Join(imagesDir, fmt.Sprintf("img%d.jpg", i+1))
+				os.Remove(imagePath)
+				if err != nil {
+					return err
+				}
+				op, err := os.Create(imagePath)
+				if err != nil {
+					return err
+				}
+				defer op.Close()
+				_, err = io.Copy(op, imgFile)
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		}()
+		if err != nil {
+			slog.Error("Image upload failed", "error", err)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		http.Redirect(w, r, "/", http.StatusSeeOther)
+	})
+	addrType, server, done, err := anyhttp.Serve(listenAddr, idle.WrapHandler(nil))
+	if err != nil {
+		slog.Error("anyhttp Serve failed", "error", err)
 	}
 
-	var opt jpeg.Options
+	if addrType == anyhttp.SystemdFD {
-	opt.Quality = 80
+		if err := idle.Wait(30 * time.Minute); err != nil {
-
+			slog.Error("Failed to wait for idler", "error", err)
-	jpeg.Encode(out, rgba, &opt)
+		}
+		ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute) // Don't want any stuck connections
+		defer cancel()
+		if err := server.Shutdown(ctx); err != nil {
+			slog.Error("http server Shutdown failed", "error", err)
+		}
+	} else {
+		<-done
+	}
+}
+
+func MakeCollage(req *collage.Request) (string, error) {
+	collageFile := fmt.Sprintf("collage-%s.jpg", collageNameGen.Next())
+	out, err := os.Create(path.Join(collageDir, collageFile))
+	if err != nil {
+		return "", fmt.Errorf("failed to create collage output file, err: %w", err)
+	}
+	defer out.Close()
+	if err := collage.Make(req, imagesDirFs, out); err != nil {
+		return "", fmt.Errorf("failed to make collage, err: %w", err)
+	}
+	return collageFile, nil
 }

main_test.go

@@ -0,0 +1,9 @@
+package main
+
+import "testing"
+
+func TestNameGen(t *testing.T) {
+	g := NewNameGen()
+	t.Logf("next id: %s", g.Next())
+	t.Logf("next id: %s", g.Next())
+}

namegen.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"crypto/rand"
+	"fmt"
+	"sync/atomic"
+	"time"
+)
+
+type nameGen struct {
+	prefix  string
+	counter atomic.Uint64
+}
+
+func NewNameGen() *nameGen {
+	currentTime := time.Now().Unix()
+	randBytes := make([]byte, 8)
+	_, err := rand.Read(randBytes)
+	if err != nil {
+		panic(err)
+	}
+	alpha := []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	uniqRunID := ""
+	for _, b := range randBytes {
+		uniqRunID += string(alpha[int(b)%len(alpha)])
+	}
+	return &nameGen{
+		prefix:  fmt.Sprintf("%d-%s", currentTime, uniqRunID),
+		counter: atomic.Uint64{},
+	}
+}
+
+func (n *nameGen) Next() string {
+	return fmt.Sprintf("%s-%d", n.prefix, n.counter.Add(1))
+}

standard.go

@@ -1,24 +0,0 @@
-package main
-
-type Resolution struct {
-	X uint
-	Y uint
-}
-
-// increased by factor 1.5
-// https://www.adorama.com/alc/pixels-and-printing-size-matters/
-
-var Letter = Resolution{
-	X: 3264,
-	Y: 4224,
-}
-
-var FiveXSeven = Resolution{
-	X: 2250,
-	Y: 3150,
-}
-
-var FourXSix = Resolution{
-	X: 1800,
-	Y: 2700,
-}

template.html

@@ -1,36 +0,0 @@
-<!DOCTYPE html>
-<html>
-    <head>
-        <link rel="icon" href="data:;base64,iVBORw0KGgo=" />
-        <style>
-.paper {
-    width: 8.5in;
-    height: 11in;
-    overflow: hidden;
-    margin: auto;
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    justify-content: space-around;
-    background-color: gainsboro;
-}
-.img1, .img2 {
-    width: 7in;
-    height: 5in;
-}
-.img1 {
-    background-color: blue;
-}
-
-.img2 {
-    background-color: yellow;
-}
-        </style>
-    </head>
-    <body>
-        <div class="paper">
-            <div class="img1"></div>
-            <div class="img2"></div>
-        </div>
-    </body>
-</html>

web/index.css

@@ -0,0 +1,137 @@
+.container {
+    display: flex;
+    background-color: lightyellow;
+    height: calc(100vh - 20px);
+}
+.controls {
+    background-color: lightgrey;
+    display: flex;
+    align-items: center;
+    justify-content: space-around;
+    flex-direction: column;
+    flex: 25%;
+    overflow: scroll;
+}
+
+.img-container {
+    /** margin: 30px; **/
+    display: flex;
+    gap: 1rem;
+    flex-wrap: wrap;
+    justify-content: center;
+}
+.img-container img {
+    width: 100px;
+    height: 100px;
+    border: 5px solid #999;
+}
+.img-container p {
+    text-align: center;
+    font-size: 2rem;
+}
+.toolbar {
+    height: 30px;
+    display: flex;
+    gap: 1rem;
+    justify-content: center;
+    align-items: flex-start;
+}
+.selected-img {
+    border: 5px solid lightgreen !important;
+}
+
+.imagebox {
+    padding: 2rem;
+    flex: 75%;
+}
+
+.image-surface {
+    overflow: hidden;
+    margin: auto;
+    border: 1px solid;
+    height: 100%;
+    width: auto;
+    --collage-ap: 110 / 85;
+    aspect-ratio: var(--collage-ap);
+}
+.showbuton {
+    font-size: 2rem;
+}
+
+.templates {
+    display: flex;
+    flex-wrap: wrap;
+     gap: 1rem;
+}
+
+.templates li {
+    list-style-type: none;
+}
+
+#page_size_selector {
+    width: 100%;
+}
+
+.template {
+    width: 100px;
+    height: 100px;
+}
+
+.template-selected {
+    background-color: green;
+}
+
+.template div {
+    border: 1px solid;
+}
+
+.single div {
+    width: 100%;
+    height: 100%;
+}
+
+.one-two {
+    display: grid;
+    grid-template-areas: 
+    "one two"
+    "one three";
+}
+.one-two .img1{
+    grid-area: one;
+}
+
+.half-leftright {
+    display:flex;
+}
+
+.half-leftright .img {
+    flex: 50%;
+}
+
+.half-topbottom .img {
+    width: 100%;
+    height: 50%;
+}
+
+.two-one-two-leftright {
+    display: grid;
+    grid-template-areas: 
+    "one two two three"
+    "four two two five";
+}
+.two-one-two-leftright .img2 {
+    grid-area: two;
+}
+
+.two-one-two-topbottom {
+    display: grid;
+    grid-template-areas: 
+    "one two"
+    "three three"
+    "three three"
+    "four five"
+}
+
+.two-one-two-topbottom .img3 {
+    grid-area: three;
+}

web/index.html

@@ -0,0 +1,97 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <link rel="icon" href="data:;base64,iVBORw0KGgo=" />
+        <!-- DEVONLY --> <script src="http://localhost:35729/livereload.js"></script>
+        <link rel="stylesheet" href="croppie.css" />
+        <script src="croppie.min.js" defer></script>
+        <script src="index.js" defer></script>
+        <link rel="stylesheet" href="index.css" />
+    </head>
+    <body>
+        <div class="container">
+            <div class="controls">
+
+
+                <label>
+                    <span>Paper size</span>
+                    <select id="page_size_selector" size=8>
+                          <option          value="letter-portrait"     > Letter (Portrait)  </option>
+                          <option selected value="letter-landscape"    > Letter (Landscape) </option>
+                          <option          value="fiveseven-portrait"  > 5 × 7 (Portrait)   </option>
+                          <option          value="fiveseven-landscape" > 7 × 5 (Landscape)  </option>
+                          <option          value="foursix-portrait"    > 4 × 6 (Portrait)   </option>
+                          <option          value="foursix-landscape"   > 4 × 6 (Landscape)  </option>
+                    </select>
+                </label>
+                <div>
+                    <div class="toolbar">
+                        <button>Left</button>
+                        <button>Right</button>
+                    </div>
+                    <div class="img-container">
+                        <div> <img src="images/img1.jpg"/>                        </div>
+                        <div> <img class="selected-img" src="images/img2.jpg"/>   </div>
+                        <div> <img src="images/img3.jpg"/>                        </div>
+                        <div> <img src="images/img4.jpg"/>                        </div>
+                        <div> <img src="images/img5.jpg"/>                        </div>
+                        <div> <img src="images/img6.jpg"/>                        </div>
+                    </div>
+                </div>
+
+
+                <ul class="templates">
+                    <li>
+                        <div id="default_template" class="template single" data-collage-template="single">
+                            <div class="img img1"></div>
+                        </div>
+                    </li>
+                    <li>
+                        <div class="template one-two" data-collage-template="one-two">
+                            <div class="img img1"></div>
+                            <div class="img img2"></div>
+                            <div class="img img3"></div>
+                        </div>
+                    </li>
+                    <li>
+                        <div class="template half-leftright" data-collage-template="half-leftright">
+                            <div class="img img1"></div>
+                            <div class="img img2"></div>
+                        </div>
+                    </li>
+                    <li>
+                        <div class="template half-topbottom" data-collage-template="half-topbottom">
+                            <div class="img img1"></div>
+                            <div class="img img2"></div>
+                        </div>
+                    </li>
+                    <li>
+                        <div class="template two-one-two-leftright" data-collage-template="two-one-two-leftright">
+                            <div class="img img1"></div>
+                            <div class="img img2"></div>
+                            <div class="img img3"></div>
+                            <div class="img img4"></div>
+                            <div class="img img5"></div>
+                        </div>
+                    </li>
+                    <li>
+                        <div class="template two-one-two-topbottom" data-collage-template="two-one-two-topbottom">
+                            <div class="img img1"></div>
+                            <div class="img img2"></div>
+                            <div class="img img3"></div>
+                            <div class="img img4"></div>
+                            <div class="img img5"></div>
+                        </div>
+                    </li>
+                </ul>
+                <button id="snapper" class="showbuton">Snap Collage</button>
+                <p><a href="" target="_blank" id="collage-url"></a></p>
+
+
+            </div>
+            <div class="imagebox">
+                <div id="collage" class="image-surface"></div>
+            </div>
+        </div>
+    </body>
+</html>

web/index.js

@@ -0,0 +1,213 @@
+"use strict";
+
+const pageSizes = {
+    "letter-portrait" : {
+        "ap": "85 / 110",
+        "width": 3264,
+        "height": 4224,
+    },
+    "letter-landscape" : {
+        "ap": "110 / 85",
+        "width": 4224,
+        "height": 3264,
+    },
+    "fiveseven-portrait" : {
+        "ap": "5 / 7",
+        "width": 2250,
+        "height": 3150,
+    },
+    "fiveseven-landscape" : {
+        "ap": "7 / 5",
+        "width": 3150,
+        "height": 2250,
+    },
+    "foursix-portrait" : {
+        "ap": "4 / 6",
+        "width": 1800,
+        "height": 2700,
+    },
+    "foursix-landscape" : {
+        "ap": "6 / 4",
+        "width": 2700,
+        "height": 1800,
+    },
+}
+
+// elements
+
+/** @type {HTMLButtonElement} */
+let snapButton
+
+/** @type {HTMLDivElement} */
+let collageDiv
+
+/** @type {HTMLSelectElement} */
+let pageSizeSelect
+
+/** @type {HTMLAnchorElement} */
+let collageUrlA
+
+// collage state
+
+let crops = [];
+let pageSize = "letter-landscape";
+const imageUrls = [
+    , // images start with index 1
+    "images/img1.jpg",
+    "images/img2.jpg",
+    "images/img3.jpg",
+    "images/img4.jpg",
+    "images/img5.jpg",
+    "images/img6.jpg",
+    "images/img7.jpg",
+]
+
+
+function main() {
+    snapButton = document.getElementById("snapper")
+    collageDiv = document.getElementById("collage")
+    pageSizeSelect = document.getElementById("page_size_selector")
+    collageUrlA = document.getElementById("collage-url")
+
+    snapButton.onclick = () => snap()
+    pageSizeSelect.onchange  = () => pageSizeChange()
+
+    for(const tmpl of document.getElementsByClassName("template")) {
+        tmpl.onclick = () => applyTemplate(tmpl)
+    }
+
+    applyTemplate(document.getElementById("default_template"))
+}
+
+/** 
+ * @param {HTMLDivElement} elem 
+ * @param {string} imgUrl
+ */
+function makeCroppieElem(elem, imgUrl) {
+    const cpie = new Croppie(elem, {
+        viewport: {
+            width: elem.clientWidth,
+            height: elem.clientHeight,
+            type: 'square'
+        },
+        showZoomer: false,
+    });
+
+    cpie.bind({
+        url: imgUrl
+    });
+
+    return cpie
+}
+
+
+function initCollage() {
+    for(const cpie of crops) {
+        cpie.destroy()
+    }
+    crops = []
+
+    for(const elem of collageDiv.getElementsByClassName("img")) {
+        const cpie = makeCroppieElem(elem, elem.dataset.collageImageUrl)
+        const lastLen = crops.push(cpie)
+        elem.dataset.collageCropieIndex = lastLen - 1
+    }
+}
+
+async function makeCollage(req) {
+    const resp = await fetch("make-collage", {
+        method: "POST",
+        headers: {
+            "Content-Type": "application/json",
+        },
+        body: JSON.stringify(req),
+    })
+    return await resp.text();
+}
+
+function snap() {
+    const col = collageDiv.offsetLeft;
+    const cot = collageDiv.offsetTop;
+    const req = {
+        background_image: "",
+        aspect: {
+            width: pageSizes[pageSize]["width"],
+            height: pageSizes[pageSize]["height"],
+        },
+        dimension: {
+            width: collageDiv.clientWidth,
+            height: collageDiv.clientHeight,
+        },
+        photos: [],
+    };
+
+    for(const elem of collageDiv.getElementsByClassName("img")) {
+        const cpie = crops[elem.dataset.collageCropieIndex]
+        const fsx = elem.offsetLeft - col
+        const fsy = elem.offsetTop - cot
+        const [sx, sy, ex, ey] = cpie.get().points;
+        const photo = {
+            image: elem.dataset.collageImageUrl.slice("images/".length),
+            crop: {
+                start: {
+                    x: parseInt(sx),
+                    y: parseInt(sy),
+                },
+                end: {
+                    x: parseInt(ex),
+                    y: parseInt(ey),
+                },
+            },
+            frame: {
+                start: {
+                    x: fsx,
+                    y: fsy,
+                },
+                end: {
+                    x: fsx + elem.clientWidth,
+                    y: fsy + elem.clientHeight,
+                },
+            },
+        };
+        req.photos.push(photo)
+    }
+
+    (async () => {
+        const collagFile = await makeCollage(req)
+        collageUrlA.href = `collages/${collagFile}`;
+        collageUrlA.text = `${collagFile} generated`;
+    })();
+}
+
+function pageSizeChange() {
+    collageDiv.style.setProperty('--collage-ap', pageSizes[pageSizeSelect.value]["ap"])
+    pageSize = pageSizeSelect.value
+    initCollage()
+}
+
+/** 
+ * @param {HTMLDivElement} templateDiv 
+ */
+function applyTemplate(templateDiv) {
+    document.getElementsByClassName("template-selected").item(0)?.classList.remove("template-selected")
+    /** @type {HTMLDivElement} */
+    const templateClone = templateDiv.cloneNode(true)
+    templateDiv.classList.add("template-selected")
+    for (const index in imageUrls) {
+        const url = imageUrls[index]
+        const imgClass = `img${index}`
+
+        const [imgDiv] = templateClone.getElementsByClassName(imgClass)
+        if(imgDiv === undefined) {
+            break;
+        }
+        imgDiv.dataset.collageImageUrl = url;
+    }
+    collageDiv.replaceChildren(...templateClone.children)
+    collageDiv.classList.remove(collageDiv.dataset.collageTemplate)
+    collageDiv.classList.add(templateDiv.dataset.collageTemplate)
+    collageDiv.dataset.collageTemplate = templateDiv.dataset.collageTemplate
+    initCollage()
+}
+
+main()

web/upload.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <!-- DEVONLY --> <script src="http://localhost:35729/livereload.js"></script>
+    </head>
+    <body>
+        <form action="/upload" method="POST" enctype="multipart/form-data">
+            <input name="photos" type=file multiple accept="image/*" />
+            <input type=submit>
+        </form>
+    </body>
+</html>