Restructured src to use PSR-4 autoloading, moved many functions to functions.php

src/functions.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace Taproot\IndieAuth;
+
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\LoggerInterface;
+
+// From https://github.com/indieweb/indieauth-client-php/blob/main/src/IndieAuth/Client.php, thanks aaronpk.
+function generateRandomString($numBytes) {
+	if (function_exists('random_bytes')) {
+		$bytes = random_bytes($numBytes);
+	} elseif (function_exists('openssl_random_pseudo_bytes')){
+		$bytes = openssl_random_pseudo_bytes($numBytes);
+	} else {
+		$bytes = '';
+		for($i=0, $bytes=''; $i < $numBytes; $i++) {
+			$bytes .= chr(mt_rand(0, 255));
+		}
+	}
+	return bin2hex($bytes);
+}
+
+function isIndieAuthAuthorizationCodeRedeemingRequest(ServerRequestInterface $request) {
+	return strtolower($request->getMethod()) == 'post'
+		&& array_key_exists('grant_type', $request->getParsedBody())
+		&& $request->getParsedBody()['grant_type'] == 'authorization_code';
+}
+
+function isIndieAuthAuthorizationRequest(ServerRequestInterface $request, $permittedMethods=['get']) {
+	return in_array(strtolower($request->getMethod()), array_map('strtolower', $permittedMethods))
+		&& array_key_exists('response_type', $request->getQueryParams())
+		&& $request->getQueryParams()['response_type'] == 'code';
+}
+
+function isAuthorizationApprovalRequest(ServerRequestInterface $request) {
+	return strtolower($request->getMethod()) == 'post'
+		&& array_key_exists('taproot_indieauth_action', $request->getParsedBody())
+		&& $request->getParsedBody()['taproot_indieauth_action'] == 'approve';
+}
+
+function buildQueryString(array $parameters) {
+	$qs = [];
+	foreach ($parameters as $k => $v) {
+		$qs[] = urlencode($k) . '=' . urlencode($v);
+	}
+	return join('&', $qs);
+}
+
+/**
+ * Append Query Parameters
+ * 
+ * Converts `$queryParams` into a query string, then checks `$uri` for an
+ * existing query string. Then appends the newly generated query string
+ * with either ? or & as appropriate.
+ */
+function appendQueryParams(string $uri, array $queryParams) {
+	$queryString = buildQueryString($queryParams);
+	$separator = parse_url($uri, \PHP_URL_QUERY) ? '&' : '?';
+	return "{$uri}{$separator}{$queryString}";
+}
+
+/**
+ * Try setLogger
+ * 
+ * If `$target` implements `LoggerAwareInterface`, set it’s logger
+ * to `$logger`. Returns `$target`.
+ */
+function trySetLogger($target, LoggerInterface $logger) {
+	if ($target instanceof LoggerAwareInterface) {
+		$target->setLogger($logger);
+	}
+	return $target;
+}