From 7a27d9a192c80a7ec0ff1fb561a4f271b7ac51c9 Mon Sep 17 00:00:00 2001
From: Gabriel Espinoza <31670639+gspinoza@users.noreply.github.com>
Date: Mon, 16 Oct 2023 14:46:19 -0400
Subject: [PATCH] lib/http: export basic go strings functions

makes the following go strings functions available to be used in custom templates; contains, hasPrefix, hasSuffix

added documentation for exported funcs
---
 lib/http/template.go | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/http/template.go b/lib/http/template.go
index e72481f13..db50d6d89 100644
--- a/lib/http/template.go
+++ b/lib/http/template.go
@@ -6,6 +6,7 @@ import (
 	"html/template"
 	"log"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/spf13/pflag"
@@ -40,6 +41,17 @@ to be used within the template to server pages:
 |-- .IsDir    | Boolean for if an entry is a directory or not. |
 |-- .Size     | Size in Bytes of the entry. |
 |-- .ModTime  | The UTC timestamp of an entry. |
+
+The server also makes the following functions available so that they can be used within the
+template. These functions help extend the options for dynamic rendering of HTML. They can
+be used to render HTML based on specific conditions.
+
+| Function   | Description |
+| :---------- | :---------- |
+| afterEpoch  | Returns the time since the epoch for the given time. |
+| contains    | Checks whether a given substring is present or not in a given string. |
+| hasPrefix   | Checks whether the given string begins with the specified prefix. |
+| hasSuffix   | Checks whether the given string end with the specified suffix. |
 `
 
 	tmpl, err := template.New("template help").Parse(help)
@@ -105,6 +117,9 @@ func GetTemplate(tmpl string) (*template.Template, error) {
 
 	funcMap := template.FuncMap{
 		"afterEpoch": AfterEpoch,
+		"contains":   strings.Contains,
+		"hasPrefix":  strings.HasPrefix,
+		"hasSuffix":  strings.HasSuffix,
 	}
 
 	tpl, err := template.New("index").Funcs(funcMap).Parse(string(data))