Merge pull request #18 from DenverCoder1/fetch-google-fonts
Jonah Lawrence
3 years ago
committed by
GitHub
commit
1d1195e3a0
@ -1,2 +1,3 @@
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vendor/
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.vscode/
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.env
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@ -0,0 +1,107 @@
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<?php declare (strict_types = 1);
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/**
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* Controller for choosing model and rendering SVG outputs
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*/
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class RendererController
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{
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/**
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* @var RendererModel $model
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*/
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private $model;
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/**
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* @var RendererView $view
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*/
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private $view;
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/**
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* @var array<string, string> $params
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*/
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private $params;
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/**
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* Construct RendererController
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*
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* @param array<string, string> $params request parameters
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*/
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public function __construct($params, $database = null)
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{
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$this->params = $params;
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// create new database connection if none was passed
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$database = $database ?? new DatabaseConnection();
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// set up model and view
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try {
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// create renderer model
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$this->model = new RendererModel(__DIR__ . "/../templates/main.php", $params, $database);
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// create renderer view
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$this->view = new RendererView($this->model);
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} catch (Exception $error) {
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// create error rendering model
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$this->model = new ErrorModel(__DIR__ . "/../templates/error.php", $error->getMessage());
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// create error rendering view
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$this->view = new ErrorView($this->model);
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}
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}
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/**
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* Redirect to the demo site
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*/
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private function redirectToDemo(): void
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{
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header('Location: demo/');
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exit;
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}
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/**
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* Set content type for page output
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*/
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private function setContentType($type): void
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{
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header("Content-type: {$type}");
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}
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/**
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* Set cache to refresh periodically
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* This ensures any updates will roll out to all profiles
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*/
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private function setCacheRefreshDaily(): void
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{
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// set cache to refresh once per day
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$timestamp = gmdate("D, d M Y 23:59:00") . " GMT";
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header("Expires: $timestamp");
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header("Last-Modified: $timestamp");
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header("Pragma: no-cache");
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header("Cache-Control: no-cache, must-revalidate");
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}
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/**
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* Set output headers
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*/
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public function setHeaders(): void
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{
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// redirect to demo site if no text is given
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if (!isset($this->params["lines"])) {
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$this->redirectToDemo();
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}
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// set the content type header
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$this->setContentType("image/svg+xml");
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// set cache headers
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$this->setCacheRefreshDaily();
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}
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/**
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* Get the rendered SVG
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*
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* @return string The SVG to output
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*/
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public function render(): string
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{
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return $this->view->render();
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}
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}
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@ -0,0 +1,78 @@
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.loader,
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.loader:before,
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.loader:after {
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display: none;
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border-radius: 50%;
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width: 2.5em;
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height: 2.5em;
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-webkit-animation-fill-mode: both;
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animation-fill-mode: both;
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-webkit-animation: load7 1.8s infinite ease-in-out;
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animation: load7 1.8s infinite ease-in-out;
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}
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.loader {
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color: var(--blue-light);
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font-size: 10px;
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margin: 0 0 38px 15px;
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position: relative;
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text-indent: -9999em;
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-webkit-transform: translateY(-4px) translateZ(0) scale(0.5);
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-ms-transform: translateY(-4px) translateZ(0) scale(0.5);
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transform: translateY(-4px) translateZ(0) scale(0.5);
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-webkit-animation-delay: -0.16s;
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animation-delay: -0.16s;
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}
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.loader:before,
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.loader:after {
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content: '';
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position: absolute;
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top: 0;
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}
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.loader:before {
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left: -3.5em;
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-webkit-animation-delay: -0.32s;
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animation-delay: -0.32s;
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}
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.loader:after {
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left: 3.5em;
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}
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@-webkit-keyframes load7 {
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0%,
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80%,
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100% {
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box-shadow: 0 2.5em 0 -1.3em;
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}
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40% {
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box-shadow: 0 2.5em 0 0;
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}
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}
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@keyframes load7 {
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0%,
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80%,
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100% {
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box-shadow: 0 2.5em 0 -1.3em;
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}
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40% {
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box-shadow: 0 2.5em 0 0;
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}
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}
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.loading + .loader,
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.loading + .loader:before,
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.loading + .loader:after {
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display: block;
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}
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.loading {
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display: none;
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}
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@ -0,0 +1,79 @@
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<?php
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/**
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* Class for accessing the font database
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*/
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class DatabaseConnection
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{
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/**
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* PostgreSQL Database Connection
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* @var resource|false
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*/
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private $conn = false;
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/**
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* Constructor for DatabaseConnection class
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* Creates a database connection
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*/
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public function __construct()
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{
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// database is missing from env
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if (!isset($_ENV["DATABASE_URL"])) {
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return;
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}
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// connect to database
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$conn_string = preg_replace(
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"/^postgres:\/\/(.+?):(.+?)@(.+?):(\d+?)\/(.+)$/",
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"host=$3 port=$4 dbname=$5 user=$1 password=$2",
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$_ENV["DATABASE_URL"]
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);
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$this->conn = pg_connect($conn_string);
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}
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/**
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* Fetch CSS from PostgreSQL Database
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*
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* @param string $font Google Font to fetch
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* @return array<string> array containing the date and the CSS for displaying the font
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*/
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public function fetchFontCSS($font)
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{
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// check connection
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if ($this->conn) {
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// fetch font from database
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$result = pg_query_params($this->conn, 'SELECT fetch_date, css FROM fonts WHERE family = $1', array($font));
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if (!$result) {
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return false;
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}
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$row = pg_fetch_row($result);
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if ($row) {
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return $row;
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}
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}
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return false;
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}
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/**
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* Insert font CSS into database
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*
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* @param string $font Font Family
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* @param string $css CSS with Base64 encoding
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* @return bool True if successful, false if connection failed
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*/
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public function insertFontCSS($font, $css)
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{
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if ($this->conn) {
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$entry = array(
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"family" => $font,
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"css" => $css,
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"fetch_date" => date('Y-m-d'),
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);
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$result = pg_insert($this->conn, 'fonts', $entry);
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if (!$result) {
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throw new InvalidArgumentException("Insertion of Google Font to database failed");
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}
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return true;
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}
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return false;
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}
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}
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@ -0,0 +1,71 @@
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<?php
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/**
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* Class for converting Google Fonts to base 64 for displaying through SVG image
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*/
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class GoogleFontConverter
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{
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/**
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* Fetch CSS from Google Fonts
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*
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* @param string $font Google Font to fetch
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* @return string|false The CSS for displaying the font
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*/
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public static function fetchFontCSS($font)
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{
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$url = "https://fonts.googleapis.com/css2?family=" . str_replace(" ", "+", $font);
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try {
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// get the CSS for the font
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$response = self::curl_get_contents($url);
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// find all font files and convert them to base64 Data URIs
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return self::encodeFonts($response);
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} catch (InvalidArgumentException $error) {
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return "";
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}
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}
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/**
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* Encode font urls in string as base 64
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*
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* @param string $css The CSS from Google Fonts
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* @return string CSS with urls replaced with base 64 Data URIs
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*/
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private static function encodeFonts($css)
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{
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$urlRegex = '/\((https\:\/\/fonts\.gstatic\.com.+?)\) format\(\'(.*?)\'\)/';
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preg_match_all($urlRegex, $css, $matches);
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$urls = array_combine($matches[1], $matches[2]);
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// go over all links and replace with data URI
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foreach ($urls as $url => $fontType) {
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$response = self::curl_get_contents($url);
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$dataURI = "data:font/{$fontType};base64," . base64_encode($response);
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$css = str_replace($url, $dataURI, $css);
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}
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return $css;
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}
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/**
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* Get the contents of a URL
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*
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* @param string $url The URL to fetch
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* @return string Response from URL
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*/
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private static function curl_get_contents($url): string
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{
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_AUTOREFERER, true);
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curl_setopt($ch, CURLOPT_HEADER, false);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($ch, CURLOPT_VERBOSE, false);
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode != 200) {
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throw new InvalidArgumentException("Failed to fetch Google Font from API.");
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}
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return $response;
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}
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}
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Before Width: | Height: | Size: 500 B After Width: | Height: | Size: 388 B |
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Before Width: | Height: | Size: 1.3 KiB After Width: | Height: | Size: 1.2 KiB |
File diff suppressed because one or more lines are too long
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After Width: | Height: | Size: 170 KiB |
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Before Width: | Height: | Size: 499 B After Width: | Height: | Size: 387 B |
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Before Width: | Height: | Size: 2.0 KiB After Width: | Height: | Size: 1.9 KiB |
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