138 lines
3.8 KiB
PHP
138 lines
3.8 KiB
PHP
<?php
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/**
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* Uploads Avatar, checks it, and removes the old one.
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* @param bool $group
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* @throws AngryAlert
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* @throws HappyAlert
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*/
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function updateAvatar(bool $group = false) {
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$publicDir = "/var/www/html/public/";
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$tmpImg = $_FILES["pp"]["tmp_name"];
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$avatarDir = $group ? "uploads/groupavatar/" : "uploads/profilepictures/";
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checkAvatarSize($tmpImg);
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if (getimagesize($tmpImg)["mime"] == "image/gif") {
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if ($_FILES["pp"]["size"] > 4000000) {
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throw new AngryAlert("Bestand is te groot, maximaal 4MB toegestaan.");
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}
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$relativePath = $avatarDir . $_SESSION["userID"] . "_avatar.gif";
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$group ? removeOldGroupAvatar($_POST["groupID"]) : removeOldUserAvatar();
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move_uploaded_file($tmpImg, $publicDir . $relativePath);
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} else {
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$relativePath = $avatarDir . $_SESSION["userID"] . "_avatar.png";
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$scaledImg = scaleAvatar($tmpImg);
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$group ? removeOldGroupAvatar($_POST["groupID"]) : removeOldUserAvatar();
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imagepng($scaledImg, $publicDir . $relativePath);
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}
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$group ? setGroupAvatarToDatabase("../" . $relativePath, $_POST["groupID"]) : setUserAvatarToDatabase("../" . $relativePath);
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throw new HappyAlert("Profielfoto veranderd.");
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}
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/**
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* Removes the old avatar from the uploads folder, for a user.
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*/
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function removeOldUserAvatar() {
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$stmt = prepareQuery("
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SELECT
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`profilepicture`
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FROM
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`user`
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WHERE
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`userID` = :userID
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");
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$stmt->bindParam(":userID", $_SESSION["userID"]);
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$stmt->execute();
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$old_avatar = $stmt->fetch()["profilepicture"];
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if ($old_avatar != NULL) {
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unlink("/var/www/html/public/uploads/" . $old_avatar);
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}
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}
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/**
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* Removes the old avatar from the uploads folder, for a group.
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* @param int $groupID
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*/
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function removeOldGroupAvatar(int $groupID) {
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$stmt = prepareQuery("
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SELECT
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`picture`
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FROM
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`group_page`
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WHERE
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groupID = :groupID
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");
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$stmt->bindParam(":groupID", $groupID);
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$stmt->execute();
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$old_avatar = $stmt->fetch()["picture"];
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if ($old_avatar != NULL) {
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unlink("/var/www/html/public/uploads/" . $old_avatar);
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}
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}
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/**
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* Inserts the the path to the avatar into the database, for Users.
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* @param string $url path to the avatar
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*/
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function setUserAvatarToDatabase(string $url) {
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$stmt = prepareQuery("
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UPDATE
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`user`
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SET
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`profilepicture` = :avatar
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WHERE
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`userID` = :userID
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");
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$stmt->bindParam(":avatar", $url);
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$stmt->bindParam(":userID", $_SESSION["userID"]);
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$stmt->execute();
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}
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/**
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* Inserts the the path to the avatar into the database, for Groups.
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* @param string $url path to the avatar
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* @param int $groupID
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*/
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function setGroupAvatarToDatabase(string $url, int $groupID) {
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$stmt = prepareQuery("
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UPDATE
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`group_page`
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SET
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`picture` = :avatar
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WHERE
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`groupID` = :groupID
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");
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$stmt->bindParam(":avatar", $url);
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$stmt->bindParam(":groupID", $groupID);
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$stmt->execute();
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}
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/**
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* Checks the resoluton of a picture.
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* @param string $img
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* @throws AngryAlert
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*/
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function checkAvatarSize(string $img) {
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$minResolution = 200;
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$imgSize = getimagesize($img);
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if ($imgSize[0] < $minResolution or $imgSize[1] < $minResolution) {
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throw new AngryAlert("Afbeelding te klein, minimaal 200x200 pixels.");
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}
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}
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/**
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* Scales a picture, standard width is 600px.
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* @param string $imgLink Path to a image file
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* @param int $newWidth Custom image width.
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* @return bool|resource Returns the image as an Resource.
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* @throws AngryAlert
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*/
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function scaleAvatar(string $imgLink, int $newWidth = 600) {
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$img = imagecreatefromstring(file_get_contents($imgLink));
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if ($img) {
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return imagescale($img, $newWidth);
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} else {
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throw new AngryAlert("Afbeelding wordt niet ondersteund.");
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}
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} |