feat(ods): implement basic ods functionality

main.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"embed"
+	"html/template"
+	"log/slog"
+	"net/http"
+	"strings"
+)
+
+// Variables to customise the search behaviour
+const (
+	listenStr = "0.0.0.0:8090"
+)
+
+//go:embed ods.txt
+var ods string
+
+//go:embed index.html
+var templatesFS embed.FS
+
+//go:embed static/*
+var static embed.FS
+
+// html templates
+var indexTemplate = template.Must(template.New("index").ParseFS(templatesFS, "index.html"))
+
+type IndexData struct {
+	HasQuery bool
+	Query    string
+	Invalid    bool
+}
+
+func getIndex() http.Handler {
+	data := IndexData{
+		HasQuery: false,
+		Query:    "",
+		Invalid:    true,
+	}
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Cache-Control", "no-store, no-cache")
+		indexTemplate.ExecuteTemplate(w, "index.html", data)
+	})
+}
+
+func postIndex() http.Handler {
+	words := strings.Split(ods,"\n")
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		data := IndexData{
+			HasQuery: true,
+			Query:    r.FormValue("query"),
+			Invalid:    true,
+		}
+		query := strings.ToUpper(data.Query)
+		for _, w := range words {
+			if w == query {
+				data.Invalid = false
+				break
+			}
+		}
+		w.Header().Set("Cache-Control", "no-store, no-cache")
+		indexTemplate.ExecuteTemplate(w, "index.html", data)
+	})
+}
+
+// The main function
+func main() {
+	http.Handle("GET /static/", http.FileServer(http.FS(static)))
+	http.Handle("GET /", getIndex())
+	http.Handle("POST /", postIndex())
+	slog.Info("listening", "addr", listenStr)
+	if err := http.ListenAndServe(listenStr, nil); err != nil && err != http.ErrServerClosed {
+		slog.Error("error listening and serving", "error", err)
+	}
+}