Add images support (inf scroll via htmx of images taken from user docs)

This commit also includes a migration from css to scss, some
improvements to the redirection workflow when no session is found and
refactors concerning flash cookies.

1 files changed, 186 insertions, 0 deletions

diff --git a/imgs.go b/imgs.go
new file mode 100644
index 0000000..ee67083
--- /dev/null
+++ b/imgs.go
@@ -0,0 +1,186 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"mime"
+	"net/http"
+	"strconv"
+	"path"
+	"path/filepath"
+	"sort"
+)
+
+const pageSize = 5
+
+func imgs(w http.ResponseWriter, r *http.Request) {
+	u, err := checkSession(w, r)
+	if u != nil && err == nil {
+		fragment := r.URL.Query().Has("fragment")
+		pageQuery := r.URL.Query().Get("page")
+		if pageQuery == "" {
+			pageQuery = "0"
+		}
+		page, err := strconv.Atoi(pageQuery)
+		if err != nil {
+			sendError(w, r, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		userDocPath := filepath.Join(baseDocDir, u.User)
+		err = os.Mkdir(userDocPath, 0750)
+		if err != nil && !os.IsExist(err) {
+			sendError(w, r, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		//files, err := os.ReadDir(userDocPath)
+		//if err != nil {
+		//	sendError(w, r, err.Error(), http.StatusInternalServerError)
+		//	return
+		//}
+		//sort.Slice(files, func(i, j int) bool {
+		//	info1, err := files[i].Info()
+		//	if err != nil {
+		//		return false
+		//	}
+		//	info2, err := files[j].Info()
+		//	if err != nil {
+		//		return false
+		//	}
+		//	return info1.ModTime().After(info2.ModTime())
+		//})
+		start := page * pageSize
+		//imgs := extractImgs(files, start)
+		imgs, err := extractImgsGlob(userDocPath)
+		if err != nil {
+			sendError(w, r, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		sort.Slice(imgs, func(i, j int) bool {
+			return imgs[i].ModTime.After(imgs[j].ModTime)
+		})
+		end := start + pageSize
+		if end > len(imgs) {
+			end = len(imgs)
+		}
+		flasherr := consumeFlash(w, r, "error")
+		data := struct {
+			Imgs []Doc
+			Start int
+			End int
+			NbFiles int
+			Page int
+			Error string
+		}{
+			imgs[start:end],
+			start + 1,
+			end,
+			len(imgs),
+			page,
+			flasherr,
+		}
+		if fragment {
+			//serveSimple(w, r, data, "templates/imgs_stub.html")
+			serveSimple(w, r, data, "templates/imgs_page.html", "templates/imgs_stub.html")
+		} else {
+			serveTemplate(w, r, data, "templates/imgs_page.html", "templates/imgs.html")
+		}
+		return
+	} else if err != nil {
+		sendError(w, r, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	sendFlash(w, r, "redirect", "/imgs")
+	http.Redirect(w, r, "/login", http.StatusSeeOther)
+}
+
+func extractImgsGlob(userDocPath string) ([]Doc, error) {
+	var typs []string = []string {
+		"image/jpeg",
+		"image/png",
+		"image/gif",
+		"image/avif",
+		"image/bmp",
+		"image/vnd.microsoft.icon",
+		"image/svg+xml",
+		"image/tiff",
+		"image/webp",
+	}
+	var exts []string
+	for _, typ := range typs {
+		e, err := mime.ExtensionsByType(typ)
+		if err != nil {
+			return nil, err
+		}
+		exts = append(exts, e...)
+	}
+	var imgs []Doc
+	for _, ext := range exts {
+		glob := fmt.Sprintf("*%s", ext)
+		p := filepath.Join(userDocPath, glob)
+		matches, err := filepath.Glob(p)
+		if err != nil {
+			return nil, err
+		}
+		for _, match := range matches {
+			info, err := os.Stat(match)
+			if err != nil {
+				return nil, err
+			}
+			imgs = append(imgs, Doc {
+				info.Name(),
+				humanize(info.Size()),
+				info.ModTime(),
+				path.Join(userDocPath, info.Name()),
+			})
+		}
+	}
+	return imgs, nil
+}
+
+//func extractImgsPaged(files []fs.DirEntry, start int) []Doc {
+//	var typs []string = []string {
+//		"image/jpeg",
+//		"image/png",
+//		"image/gif",
+//		"image/avif",
+//		"image/bmp",
+//		"image/vnd.microsoft.icon",
+//		"image/svg+xml",
+//		"image/tiff",
+//		"image/webp",
+//	}
+//	var exts []string
+//	for _, typ := range typs {
+//		e, err := mime.ExtensionsByType(typ)
+//		if err != nil {
+//			sendError(w, r, err.Error(), http.StatusInternalServerError)
+//			return
+//		}
+//		exts = append(exts, e...)
+//	}
+//	var imgs []Doc
+//	var i int = 0
+//	for _, file := range files {
+//		if i >= start + pageSize {
+//			break
+//		}
+//		for _, ext := range exts {
+//			if strings.HasSuffix(file.Name(), ext) && i >= start {
+//				info, err := file.Info()
+//				if err != nil {
+//					sendError(w, r, err.Error(), http.StatusInternalServerError)
+//					return
+//				}
+//				imgs = append(imgs, Doc {
+//					file.Name(),
+//					humanize(info.Size()),
+//					info.ModTime(),
+//					path.Join(baseDocDir, u.User, file.Name()),
+//				})
+//				i++
+//				break
+//			}
+//		}
+//	}
+//	return imgs
+//}