lots of fixes and more EJS

src/functions.js

@@ -0,0 +1,71 @@
+import { createRequire } from 'module';
+const require = createRequire(import.meta.url)
+
+// The configuration defines a date format using the date-fns (a datetime library) syntax 
+// eg "yyyy-MM-dd"
+// this converts unix time (an integer) into a string that is formatted according to config.js
+// uses date-fns's fromUnixTime() and format() functions
+// returns the formatted date (string)
+export function unix_time_to_date_format(unix_time) {
+    const { fromUnixTime, format, getUnixTime } = require("date-fns") // A date utility library
+    const config = require("../config.json")
+	let date = fromUnixTime(unix_time)
+	let formatted_date = format(date, config.date_format)
+	return formatted_date
+}
+// This is similar to the above function, however, instead of formatting to the users
+// configuration, it formats to RFC-822 which is the date format used by RSS feeds
+// eg "Mon, 23 May 2025 18:59:59 +0100"
+// accepts unix time (int)
+// returns the formatted date (string)
+export function unix_time_to_rss_date(unix_time) {
+    const { fromUnixTime, format, getUnixTime } = require("date-fns") // A date utility library
+    const config = require("../config.json")
+	let date = fromUnixTime(unix_time)
+	let formatted_date = format(date, "EEE, dd MMM yyyy HH:mm:ss")
+	return `${formatted_date} ${config.time_zone}`
+}
+// This function accepts a list of strings eg ["string1","string2,"string3"] (any length)
+// then returns a string of them each pointing to a seperate url
+// eg "<a href="/tag/string1">string1</a>, <a href="/tag/string2">string2</a>, <a href="/tag/string3">string3</a>"
+// this is so you can have a list of tags that each point to their individual tag page
+// returns: string
+export function hyperlink_tags(tags) {
+	let string = "" // Initialises the string
+	for (let tag_index = 0; tag_index < tags.length; tag_index++) { // Loop over each tag
+		string += `<a href="/tag/${tags[tag_index]}">${tags[tag_index]}</a>` // Adds the tag to the string as a HTML href
+		if (tag_index < tags.length - 1) { // If there are more tags, then insert a comma
+			string += ", ";
+		}
+	}
+	return string
+}
+// The users are stored as a list of objects [ user_object, user_object, user_object ]
+// So you cannot easily find the userID (position in list) from the username
+// This function returns the username for a given userID by looping over every user
+// if the user is present, it returns the index of the user (integer)
+// if the user is not present it returns -1
+export function get_userID(username) {
+    const users = require("../data/users.json")
+	for (let i = 0; i < users.length; i++) { // Loop over every user
+		if (users[i]['username'] == username) {
+			return i // If the username matches then return the index of that user
+		}
+	}
+	return -1 // If user is not present, return -1
+}
+// This escapes some potentially dangerous HTML characters with their HTML entities
+// https://www.freeformatter.com/html-entities.html
+// accepts a string
+// returns a string with some character replaced by their entities
+export function escape_input(input) {
+    let output = input
+        .replaceAll("<", "&lt;")
+        .replaceAll(">", "&gt;")
+        .replaceAll("\\", "&#92;")
+        .replaceAll('"', "&#34;")
+        .replaceAll("'", "&#39;")
+        .replaceAll("/", "&#47;")
+        .replaceAll("%", "&#37;")
+    return output
+}