Preload all entries into memory on server startup

database.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"io/fs"
+	"log"
+	"os"
+	"strings"
+)
+
+type Entry struct {
+	Name string		// from filename
+	Content string	// from content
+}
+
+type Database struct {
+	Entries []Entry
+}
+
+func (db *Database) TOC() []string {
+	var names []string
+	for _, e := range db.Entries {
+		names = append(names, e.Name)
+	}
+	return names
+}
+
+func (db *Database) Entry(name string) string {
+	// returns empty string if not found
+	result := ""
+	for _, e := range db.Entries {
+		if e.Name == name {
+			result = e.Content
+		}
+	}
+	return result
+}
+
+func BuildDB(directory string) Database {
+	logger := log.Default()
+	logger.Println("Building database")
+	var entries []Entry
+	// get files in directory and read them
+	directory = strings.TrimRight(directory, "/") // we don't need that last / -> if '/' is used as directory, you are dumb.
+	entriesDirFs := os.DirFS(directory)
+	files, err := fs.Glob(entriesDirFs, "*")
+	if err != nil { logger.Panicln(err) }
+	for _, f := range files {
+		contentB, err := os.ReadFile(directory + "/" + f)
+		if err != nil { logger.Panicln(err) }
+		entries = append(entries, Entry{Name: f, Content: string(contentB)})
+	}
+	return Database{Entries: entries}
+}