Improve mobile UI and add infinite scroll

cpone-dashboard/menu/result/handler.go

@@ -5,12 +5,15 @@ import (
 	"cpone-dashboard/menu/projects"
 	"html/template"
 	"net/http"
+	"strconv"
 )
 
 var tmpl *template.Template
 var pdfBaseURL string
 var basePath string
 
+const defaultPageSize = 30
+
 func SetTemplates(t *template.Template) { tmpl = t }
 func SetPDFBaseURL(u string)            { pdfBaseURL = u }
 func SetBasePath(p string)              { basePath = p }
@@ -24,51 +27,108 @@ type pageData struct {
 	FilteredRows   []ResultRow
 	Summary        ResultSummary
 	PDFBaseURL     string
+	Page           int
+	PageSize       int
+	HasMore        bool
+	VisibleCount   int
+	TotalFiltered  int
+	NextPage       int
 }
 
-func Index(w http.ResponseWriter, r *http.Request) {
+func parsePage(q string) int {
+	p, err := strconv.Atoi(q)
+	if err != nil || p < 1 {
+		return 1
+	}
+	return p
+}
+
+func buildResultData(r *http.Request) (pageData, int, error) {
 	username := auth.Username(r)
 	mcuID := auth.SelectedProjectID(r)
 	if mcuID == 0 {
-		http.Redirect(w, r, basePath+"/projects", http.StatusSeeOther)
-		return
+		return pageData{}, http.StatusSeeOther, nil
 	}
 	project, ok, err := projects.GetUserProject(username, mcuID)
 	if err != nil {
-		http.Error(w, "query error", http.StatusInternalServerError)
-		return
+		return pageData{}, http.StatusInternalServerError, err
 	}
 	if !ok {
-		http.Redirect(w, r, basePath+"/projects", http.StatusSeeOther)
-		return
+		return pageData{}, http.StatusSeeOther, nil
 	}
 
 	rows, err := GetResultRows(mcuID)
 	if err != nil {
-		http.Error(w, "query error", http.StatusInternalServerError)
-		return
+		return pageData{}, http.StatusInternalServerError, err
 	}
 
 	summary := BuildResultSummary(rows)
 	search := r.URL.Query().Get("search")
 	filter := r.URL.Query().Get("filter")
 	filteredRows := FilterResultRows(rows, search, filter)
-
-	t := tmpl
-	if t == nil {
-		http.Error(w, "template not ready", http.StatusInternalServerError)
-		return
+	page := parsePage(r.URL.Query().Get("page"))
+	pagedRows, hasMore := PaginateResultRows(filteredRows, page, defaultPageSize)
+	visibleCount := page * defaultPageSize
+	if visibleCount > len(filteredRows) {
+		visibleCount = len(filteredRows)
 	}
-	if err := t.ExecuteTemplate(w, "base", pageData{
+
+	return pageData{
 		Username:       username,
 		CurrentProject: project,
 		Search:         search,
 		Filter:         filter,
 		Rows:           rows,
-		FilteredRows:   filteredRows,
+		FilteredRows:   pagedRows,
 		Summary:        summary,
 		PDFBaseURL:     pdfBaseURL,
-	}); err != nil {
+		Page:           page,
+		PageSize:       defaultPageSize,
+		HasMore:        hasMore,
+		VisibleCount:   visibleCount,
+		TotalFiltered:  len(filteredRows),
+		NextPage:       page + 1,
+	}, http.StatusOK, nil
+}
+
+func Index(w http.ResponseWriter, r *http.Request) {
+	t := tmpl
+	if t == nil {
+		http.Error(w, "template not ready", http.StatusInternalServerError)
+		return
+	}
+
+	data, status, err := buildResultData(r)
+	if err != nil {
+		http.Error(w, "query error", status)
+		return
+	}
+	if status == http.StatusSeeOther {
+		http.Redirect(w, r, basePath+"/projects", http.StatusSeeOther)
+		return
+	}
+
+	if err := t.ExecuteTemplate(w, "base", data); err != nil {
+		http.Error(w, "template error", http.StatusInternalServerError)
+	}
+}
+
+func List(w http.ResponseWriter, r *http.Request) {
+	t := tmpl
+	if t == nil {
+		http.Error(w, "template not ready", http.StatusInternalServerError)
+		return
+	}
+	data, status, err := buildResultData(r)
+	if err != nil {
+		http.Error(w, "query error", status)
+		return
+	}
+	if status == http.StatusSeeOther {
+		http.Error(w, "unauthorized", http.StatusUnauthorized)
+		return
+	}
+	if err := t.ExecuteTemplate(w, "result-list-chunk", data); err != nil {
 		http.Error(w, "template error", http.StatusInternalServerError)
 	}
 }