446 lines
14 KiB
PHP
446 lines
14 KiB
PHP
<?php
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namespace api\blog;
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use api\utils\imgUtils;
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use DOMDocument;
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use PDO;
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use Psr\Http\Message\UploadedFileInterface;
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require_once __DIR__ . "/../utils/config.php";
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require_once __DIR__ . "/../utils/imgUtils.php";
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/**
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* Blog Data Class
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* Define all functions which either get, update, create or delete posts
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*/
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class blogData
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{
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/**
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* Get all blog posts
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* @return array - Array of all blog posts or error message
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*/
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public function getBlogPosts(): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog ORDER BY dateCreated DESC;");
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$stmt->execute();
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// set the resulting array to associative
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$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
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if ($result)
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{
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return $result;
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}
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return array("errorMessage" => "Error, blog data not found");
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}
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/**
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* Get a blog post with the given ID
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* @param string $title - Title of the blog post
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* @return array - Array of all blog posts or error message
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*/
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public function getBlogPost(string $title): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog WHERE title = :title;");
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$stmt->bindParam(":title", $title);
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$stmt->execute();
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// set the resulting array to associative
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$result = $stmt->fetch(PDO::FETCH_ASSOC);
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if ($result)
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{
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return $result;
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}
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return array("errorMessage" => "Error, blog post could not found");
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}
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/**
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* Get the latest blog post
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* @return array - Array of the latest blog post or error message
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*/
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public function getLatestBlogPost(): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog ORDER BY dateCreated DESC LIMIT 1;");
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$stmt->execute();
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// set the resulting array to associative
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$result = $stmt->fetch(PDO::FETCH_ASSOC);
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if ($result)
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{
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return $result;
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}
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return array("errorMessage" => "Error, blog post could not found");
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}
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/**
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* Get featured blog post
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* @return array - Array of the featured blog post or error message
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*/
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public function getFeaturedBlogPost(): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog WHERE featured = 1;");
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$stmt->execute();
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$result = $stmt->fetch(PDO::FETCH_ASSOC);
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if ($result)
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{
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return $result;
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}
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return array("errorMessage" => "Error, blog post could not found");
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}
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/**
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* Get the blog posts with the given category
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* @param string $category - Category of the blog post
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* @return array - Array of the blog posts with the given category or error message
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*/
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public function getBlogPostsWithCategory(string $category): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog WHERE categories LIKE :category;");
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$stmt->bindParam(":category", $category);
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$stmt->execute();
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// set the resulting array to associative
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$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
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if ($result)
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{
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return $result;
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}
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return array("errorMessage" => "Error, blog post could not found");
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}
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public function getCategories(): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT DISTINCT categories FROM blog;");
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$stmt->execute();
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// set the resulting array to associative
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$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
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if ($result)
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{
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return $result;
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}
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return array("errorMessage" => "Error, blog post could not found");
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}
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/**
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* Delete a blog post with the given ID
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* @param int $ID - ID of the blog post to delete
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* @return string - Success or error message
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*/
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public function deletePost(int $ID): string
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{
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$conn = dbConn();
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$stmtCheckPost = $conn->prepare("SELECT * FROM blog WHERE ID = :ID");
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$stmtCheckPost->bindParam(":ID", $ID);
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$stmtCheckPost->execute();
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$result = $stmtCheckPost->fetch(PDO::FETCH_ASSOC);
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if (!$result)
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{
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return "post not found";
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}
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if ($result["featured"] === 1)
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{
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return "cannot delete";
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}
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$stmt = $conn->prepare("DELETE FROM blog WHERE ID = :ID");
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$stmt->bindParam(":ID", $ID);
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if ($stmt->execute())
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{
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$imagUtils = new imgUtils();
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$imagUtils->deleteDirectory("../blog/imgs/" . $result["title"] . "_" . $result["folderID"] . "/");
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return "success";
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}
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return "error";
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}
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/**
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* Update the blog post with the given ID
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* @param int $ID - ID of the blog post to update
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* @param string $title - Title of the blog post
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* @param bool $featured - Whether the blog post is featured or not
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* @param string $abstract - Abstract of the blog post i.e. a short description
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* @param string $body - Body of the blog post
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* @param string $dateModified - Date the blog post was modified
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* @param string $categories - Categories of the blog post
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* @return bool|string - Success or error message
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*/
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public function updatePost(int $ID, string $title, bool $featured, string $abstract, string $body, string $dateModified, string $categories): bool|string
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{
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$conn = dbConn();
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$stmtCheckPost = $conn->prepare("SELECT * FROM blog WHERE ID = :ID");
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$stmtCheckPost->bindParam(":ID", $ID);
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$stmtCheckPost->execute();
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$result = $stmtCheckPost->fetch(PDO::FETCH_ASSOC);
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if (!$result)
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{
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return "post not found";
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}
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if (!$featured && $result["featured"] === 1)
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{
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return "unset feature";
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}
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if ($featured)
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{
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$stmtUnsetFeatured = $conn->prepare("UPDATE blog SET featured = 0 WHERE featured = 1;");
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$stmtUnsetFeatured->execute();
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}
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$to = "../blog/imgs/" . $title . "_" . $result["folderID"] . "/";
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if ($result["title"] !== $title)
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{
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$from = "../blog/imgs/" . $result["title"] . "_" . $result["folderID"] . "/";
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mkdir($to, 0777, true);
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rename($result["headerImg"], $to . basename($result["headerImg"]));
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$body = $this->changeHTMLSrc($body, $to, $from);
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rmdir($from);
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}
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$from = "../blog/imgs/tmp/";
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$newBody = $this->changeHTMLSrc($body, $to, $from);
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$stmt = $conn->prepare("UPDATE blog SET title = :title, featured = :featured, abstract = :abstract, body = :body, dateModified = :dateModified, categories = :categories WHERE ID = :ID;");
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$stmt->bindParam(":ID", $ID);
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$stmt->bindParam(":title", $title);
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$stmt->bindParam(":featured", $featured);
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$stmt->bindParam(":abstract", $abstract);
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$stmt->bindParam(":body", $newBody);
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$stmt->bindParam(":dateModified", $dateModified);
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$stmt->bindParam(":categories", $categories);
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return $stmt->execute();
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}
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/**
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* Creates a new post di rectory, uploads the header image and moves the images from the
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* temp folder to the new folder, then updates the post html to point to the new images, finally
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* it creates the post in the database
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* @param string $title - Title of the blog post
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* @param string $abstract - Abstract of the blog post i.e. a short description
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* @param string $body - Body of the blog post
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* @param string $dateCreated - Date the blog post was created
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* @param bool $featured - Whether the blog post is featured or not
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* @param string $categories - Categories of the blog post
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* @param UploadedFileInterface $headerImg - Header image of the blog post
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* @return int|string - ID of the blog post or error message
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*/
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public function createPost(string $title, string $abstract, string $body, string $dateCreated, bool $featured, string $categories, UploadedFileInterface $headerImg): int|string
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{
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$conn = dbConn();
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$folderID = uniqid();
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$targetFile = array("imgLocation" => "../blog/imgs/placeholder.png");
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$targetDir = "../blog/imgs/" . $title . "_" . $folderID . "/";
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mkdir($targetDir, 0777, true);
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if ($headerImg !== null)
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{
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$imagUtils = new imgUtils();
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$targetFile = $imagUtils->uploadFile($targetDir, $headerImg);
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}
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if (!is_array($targetFile))
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{
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return $targetFile;
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}
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$newBody = $this->changeHTMLSrc($body, $targetDir, "../blog/imgs/tmp/");
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if ($featured)
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{
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$stmtMainProject = $conn->prepare("UPDATE blog SET featured = 0 WHERE featured = 1;");
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$stmtMainProject->execute();
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}
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$stmt = $conn->prepare("INSERT INTO blog (title, dateCreated, dateModified, featured, headerImg, abstract, body, categories, folderID)
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VALUES (:title, :dateCreated, :dateModified, :featured, :headerImg, :abstract, :body, :categories, :folderID);");
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$stmt->bindParam(":title", $title);
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$stmt->bindParam(":dateCreated", $dateCreated);
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$stmt->bindParam(":dateModified", $dateCreated);
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$isFeatured = $featured ? 1 : 0;
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$stmt->bindParam(":featured", $isFeatured);
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$stmt->bindParam(":headerImg", $targetFile["imgLocation"]);
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$stmt->bindParam(":abstract", $abstract);
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$stmt->bindParam(":body", $newBody);
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$stmt->bindParam(":categories", $categories);
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$stmt->bindParam(":folderID", $folderID);
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if ($stmt->execute())
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{
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return intval($conn->lastInsertId());
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}
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return "Error, couldn't create post";
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}
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/**
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* Upload the images in the post to temp folder and return image location
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* @param UploadedFileInterface $img - Image to upload
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* @return string|array - String with error message or array with the location of the uploaded file
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*/
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public function uploadPostImage(UploadedFileInterface $img): string|array
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{
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$targetDir = "../blog/imgs/tmp/";
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$imagUtils = new imgUtils();
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$targetFile = $imagUtils->uploadFile($targetDir, $img);
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$file = $targetDir . basename($img->getClientFilename());
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if (file_exists($file))
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{
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return array("url" => $file);
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}
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if (!is_array($targetFile))
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{
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return $targetFile;
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}
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if (file_exists($targetFile["imgLocation"]))
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{
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return array("url" => $targetFile["imgLocation"]);
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}
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return "Couldn't upload the image";
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}
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/**
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* Upload the header image of the post and update the database
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* @param int $ID - ID of the post
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* @param UploadedFileInterface $img - Image to upload
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* @return string|array - String with error message or array with the location of the uploaded file
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*/
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public function uploadHeaderImage(int $ID, UploadedFileInterface $img): string|array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog WHERE ID = :ID;");
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$stmt->bindParam(":ID", $ID);
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$stmt->execute();
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$result = $stmt->fetch(PDO::FETCH_ASSOC);
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if (!$result)
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{
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return "Couldn't find the post";
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}
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$targetDir = "../blog/imgs/" . $result["title"] . "_" . $result["folderID"] . "/";
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$imagUtils = new imgUtils();
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$targetFile = $imagUtils->uploadFile($targetDir, $img);
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if (!is_array($targetFile))
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{
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return $targetFile;
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}
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if (file_exists($targetFile["imgLocation"]))
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{
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unlink($result["headerImg"]);
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$stmt = $conn->prepare("UPDATE blog SET headerImg = :headerImg WHERE ID = :ID;");
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$stmt->bindParam(":ID", $ID);
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$stmt->bindParam(":headerImg", $targetFile["imgLocation"]);
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$stmt->execute();
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if ($stmt->rowCount() > 0)
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{
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return $targetFile;
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}
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return "Couldn't update the post";
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}
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return "Couldn't upload the image";
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}
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/**
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* Change the HTML src of the images in the post to point to the new location
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* @param string $body - Body of the post
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* @param string $to - New location of the images
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* @param string $from - Old location of the images
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* @return string - Body of the post with the new image locations
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*/
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public function changeHTMLSrc(string $body, string $to, string $from): string
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{
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$htmlDoc = new DOMDocument();
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$htmlDoc->loadHTML($body, LIBXML_NOERROR);
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$doc = $htmlDoc->getElementsByTagName('body')->item(0);
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$imgs = $doc->getElementsByTagName('img');
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$srcList = array();
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foreach ($imgs as $img)
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{
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$src = $img->getAttribute("src");
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$src = urldecode($src);
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$srcList[] = $src;
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$fileName = basename($src);
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$img->setAttribute("src", substr($to, 2) . $fileName);
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}
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$files = scandir($from);
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foreach ($files as $file)
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{
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if ($file != "." && $file != "..")
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{
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if (!in_array($from . $file, $srcList))
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{
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unlink($from . $file);
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}
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else
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{
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rename($from . $file, $to . $file);
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}
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}
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}
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$newBody = '';
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foreach ($doc->childNodes as $node)
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{
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$newBody .= $htmlDoc->saveHTML($node);
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}
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return $newBody;
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}
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/**
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* Get all posts with the given category
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* @param string $category - Category of the post
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* @return array - Array of all posts with the given category or error message
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*/
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public function getPostsByCategory(string $category): array
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{
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$conn = dbConn();
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$stmt = $conn->prepare("SELECT * FROM blog WHERE LOCATE(:category, categories) > 0;");
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$stmt->bindParam(":category", $category);
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$stmt->execute();
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return $stmt->fetchAll(PDO::FETCH_ASSOC);
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}
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} |