Create Template.php

Author: mpdroog

Template.php

@@ -0,0 +1,63 @@
+<?php
+namespace core;
+
+// Template is used for simple page rendering with PHP
+// in an opiniated way (maximizing productivity for the developer in a multi-language environment)
+class Template {
+	public string $base = __DIR__;
+
+	private array $cache_langs = [];  // cached language files
+	private array $missing_text = []; // sentences that currently lack a translation [lang]=[sentence1,sentence2...]
+
+	// langfile loads the given file for a language (caching it for fast performance)
+	public function langfile(string $lang, string $file): ?array {
+		if ($lang === "en") user_error("already english");
+
+		$lookup = $this->cache_langs[$lang][$file] ?? null;
+		if ($lookup === null) {
+			$fname = $this->base . "/lang.d/$lang/static/$file.json";
+			if (! file_exists($fname)) {
+				echo sprintf("WARN: Lang(%s) missing langfile\n", $fname);
+			} else {
+				$lookup = json_decode(file_get_contents($fname), true);
+				if (! is_array($lookup)) user_error("Failed decoding $fname");
+				$cache_langs[$lang][$file] = $lookup; // cache if user later on
+			}
+		}
+		return $lookup;
+	}
+
+	// translate-func avail in templates
+	public function translate(string $lang, string $file): callable {
+		return function(string $english, array $args = []) use($lang, $file): string {
+			if ($lang === "en") return $english;
+			if (isset($args["file"])) {
+				// Override file from template with underscore version
+				// (i.e. used in header/footer to have one file for all pages)
+				$file = sprintf("_%s.php", $args["file"]);
+			}
+			$lookup = $this->langfile($lang, $file);
+
+			if (! isset($lookup[ $english ])) {
+				$this->missing_text[ $lang ][ $file ][ $english ] = $english; // Hint builder we don't have this and want it
+				//fwrite(STDERR, sprintf("WARN: Lang(%s/%s) missing text=%s\n", $lang, $file, $english) );
+				return $english;
+			}
+			return $lookup[ $english ];
+		};
+	}
+
+        // strip removes whitespaces to solve elements not pushed on eachother
+        // i.e. products page the term selector
+	public static function strip(string $htm): string {
+		$htm = str_replace("\n", "", $htm);
+		$htm = str_replace("\r", "", $htm);
+		$htm = str_replace("\t", "", $htm);
+		$htm = str_replace("  ", "", $htm);
+		return $htm;
+	}
+
+	public function missing(): array {
+		return $this->missing_text;
+	}
+}