DSP Project first push, date: 29/01/2026
This commit is contained in:
Sok Ponlork
293
classes/Classifications.php
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293
classes/Classifications.php
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<?php
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class Classifications {
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private $pdo;
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public function __construct(PDO $pdo) {
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$this->pdo = $pdo;
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}
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// --- Data Type Management (dsps_tbl_typedatasource) ---
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/**
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* Adds a new data type.
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*
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* @param string $name_en English name of the data type.
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* @param string|null $name_kh Khmer name of the data type.
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* @param int $reg_by User ID who registered it.
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* @return bool True on success.
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* @throws Exception If a database error occurs or name already exists.
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*/
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public function addDataType(string $name_en, ?string $name_kh, int $reg_by): bool {
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$sql = "INSERT INTO dsps_tbl_typedatasource (dspstds_name_en, dspstds_name_kh, dspstds_reg_by)
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VALUES (:name_en, :name_kh, :reg_by)";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':name_en', $name_en);
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$stmt->bindParam(':name_kh', $name_kh);
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$stmt->bindParam(':reg_by', $reg_by);
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return $stmt->execute();
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} catch (PDOException $e) {
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if ($e->getCode() == '23000') { // Integrity constraint violation (duplicate entry)
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throw new Exception("Data Type with this English name already exists.");
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}
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error_log("Error adding data type: " . $e->getMessage());
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throw new Exception("Could not add data type. Please try again later.");
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}
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}
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/**
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* Updates an existing data type.
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*
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* @param int $id ID of the data type to update.
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* @param string $name_en New English name.
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* @param string|null $name_kh New Khmer name.
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* @param int $mod_by User ID who modified it.
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* @return bool True on success.
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* @throws Exception If a database error occurs or name already exists.
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*/
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public function updateDataType(int $id, string $name_en, ?string $name_kh, int $mod_by): bool {
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$sql = "UPDATE dsps_tbl_typedatasource
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SET dspstds_name_en = :name_en, dspstds_name_kh = :name_kh,
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dspstds_mod_datetime = CURRENT_TIMESTAMP, dspstds_reg_by = :mod_by
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WHERE pkdspstds_id = :id";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':name_en', $name_en);
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$stmt->bindParam(':name_kh', $name_kh);
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$stmt->bindParam(':mod_by', $mod_by);
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$stmt->bindParam(':id', $id);
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return $stmt->execute();
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} catch (PDOException $e) {
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if ($e->getCode() == '23000') {
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throw new Exception("Data Type with this English name already exists.");
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}
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error_log("Error updating data type (ID: $id): " . $e->getMessage());
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throw new Exception("Could not update data type. Please try again later.");
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}
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}
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/**
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* Deletes a data type.
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*
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* @param int $id ID of the data type to delete.
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* @return bool True on success.
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* @throws Exception If a database error occurs or data type is in use.
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*/
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public function deleteDataType(int $id): bool {
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// Check if any data sources are using this data type
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$checkSql = "SELECT COUNT(*) FROM dsps_tbl_datasource WHERE fkdspstds_id = :id";
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$stmtCheck = $this->pdo->prepare($checkSql);
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$stmtCheck->bindParam(':id', $id);
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$stmtCheck->execute();
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if ($stmtCheck->fetchColumn() > 0) {
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throw new Exception("Cannot delete Data Type: It is currently used by one or more data sources.");
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}
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$sql = "DELETE FROM dsps_tbl_typedatasource WHERE pkdspstds_id = :id";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':id', $id);
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return $stmt->execute();
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} catch (PDOException $e) {
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error_log("Error deleting data type (ID: $id): " . $e->getMessage());
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throw new Exception("Could not delete data type. Please try again later.");
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}
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}
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/**
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* Retrieves a single data type by ID.
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*
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* @param int $id ID of the data type.
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* @return array|false Data type data or false if not found.
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* @throws Exception If a database error occurs.
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*/
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public function getDataTypeById(int $id) {
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$sql = "SELECT * FROM dsps_tbl_typedatasource WHERE pkdspstds_id = :id";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':id', $id);
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$stmt->execute();
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return $stmt->fetch(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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error_log("Error fetching data type by ID ($id): " . $e->getMessage());
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throw new Exception("Could not retrieve data type. Please try again later.");
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}
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}
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/**
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* Retrieves all data types.
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*
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* @return array An array of data type data.
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* @throws Exception If a database error occurs.
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*/
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public function getAllDataTypes(): array {
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$sql = "SELECT * FROM dsps_tbl_typedatasource ORDER BY dspstds_name_en ASC";
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try {
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$stmt = $this->pdo->query($sql);
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return $stmt->fetchAll(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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error_log("Error fetching all data types: " . $e->getMessage());
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throw new Exception("Could not retrieve data types. Please try again later.");
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}
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}
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/**
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* Gets the total count of data types.
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*
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* @return int The total number of data types.
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* @throws Exception If a database error occurs.
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*/
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public function getTotalDataTypes(): int {
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$sql = "SELECT COUNT(*) FROM dsps_tbl_typedatasource";
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try {
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$stmt = $this->pdo->query($sql);
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return $stmt->fetchColumn();
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} catch (PDOException $e) {
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error_log("Error getting total data types count: " . $e->getMessage());
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throw new Exception("Could not retrieve data type count. Please try again later.");
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}
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}
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// --- Category Management (dsps_tbl_dspscategory) ---
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/**
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* Adds a new category.
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*
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* @param string $title_en English title of the category.
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* @param string|null $details Details about the category.
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* @param int $reg_by User ID who registered it.
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* @return bool True on success.
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* @throws Exception If a database error occurs or title already exists.
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*/
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public function addCategory(string $title_en, ?string $details, int $reg_by): bool {
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$sql = "INSERT INTO dsps_tbl_dspscategory (dspscate_title_en, dspscate_details, dspscate_reg_by)
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VALUES (:title_en, :details, :reg_by)";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':title_en', $title_en);
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$stmt->bindParam(':details', $details);
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$stmt->bindParam(':reg_by', $reg_by);
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return $stmt->execute();
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} catch (PDOException $e) {
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if ($e->getCode() == '23000') {
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throw new Exception("Category with this English title already exists.");
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}
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error_log("Error adding category: " . $e->getMessage());
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throw new Exception("Could not add category. Please try again later.");
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}
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}
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/**
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* Updates an existing category.
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*
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* @param int $id ID of the category to update.
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* @param string $title_en New English title.
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* @param string|null $details New details.
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* @param int $mod_by User ID who modified it.
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* @return bool True on success.
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* @throws Exception If a database error occurs or title already exists.
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*/
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public function updateCategory(int $id, string $title_en, ?string $details, int $mod_by): bool {
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$sql = "UPDATE dsps_tbl_dspscategory
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SET dspscate_title_en = :title_en, dspscate_details = :details,
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dspscate_mod_datetime = CURRENT_TIMESTAMP, dspscate_reg_by = :mod_by
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WHERE pkdspscate_id = :id";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':title_en', $title_en);
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$stmt->bindParam(':details', $details);
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$stmt->bindParam(':mod_by', $mod_by);
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$stmt->bindParam(':id', $id);
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return $stmt->execute();
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} catch (PDOException $e) {
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if ($e->getCode() == '23000') {
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throw new Exception("Category with this English title already exists.");
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}
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error_log("Error updating category (ID: $id): " . $e->getMessage());
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throw new Exception("Could not update category. Please try again later.");
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}
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}
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/**
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* Deletes a category.
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*
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* @param int $id ID of the category to delete.
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* @return bool True on success.
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* @throws Exception If a database error occurs or category is in use.
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*/
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public function deleteCategory(int $id): bool {
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// Check if any data sources are using this category
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$checkSql = "SELECT COUNT(*) FROM dsps_tbl_datasource WHERE fkdspscate_id = :id";
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$stmtCheck = $this->pdo->prepare($checkSql);
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$stmtCheck->bindParam(':id', $id);
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$stmtCheck->execute();
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if ($stmtCheck->fetchColumn() > 0) {
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throw new Exception("Cannot delete Category: It is currently used by one or more data sources.");
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}
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$sql = "DELETE FROM dsps_tbl_dspscategory WHERE pkdspscate_id = :id";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':id', $id);
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return $stmt->execute();
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} catch (PDOException $e) {
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error_log("Error deleting category (ID: $id): " . $e->getMessage());
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throw new Exception("Could not delete category. Please try again later.");
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}
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}
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/**
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* Retrieves a single category by ID.
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*
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* @param int $id ID of the category.
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* @return array|false Category data or false if not found.
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* @throws Exception If a database error occurs.
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*/
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public function getCategoryById(int $id) {
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$sql = "SELECT * FROM dsps_tbl_dspscategory WHERE pkdspscate_id = :id";
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try {
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$stmt = $this->pdo->prepare($sql);
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$stmt->bindParam(':id', $id);
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$stmt->execute();
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return $stmt->fetch(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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error_log("Error fetching category by ID ($id): " . $e->getMessage());
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throw new Exception("Could not retrieve category. Please try again later.");
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}
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}
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/**
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* Retrieves all categories.
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*
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* @return array An array of category data.
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* @throws Exception If a database error occurs.
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*/
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public function getAllCategories(): array {
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$sql = "SELECT * FROM dsps_tbl_dspscategory ORDER BY dspscate_title_en ASC";
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try {
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$stmt = $this->pdo->query($sql);
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return $stmt->fetchAll(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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error_log("Error fetching all categories: " . $e->getMessage());
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throw new Exception("Could not retrieve categories. Please try again later.");
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}
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}
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/**
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* Gets the total count of categories.
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*
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* @return int The total number of categories.
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* @throws Exception If a database error occurs.
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*/
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public function getTotalCategories(): int {
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$sql = "SELECT COUNT(*) FROM dsps_tbl_dspscategory";
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try {
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$stmt = $this->pdo->query($sql);
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return $stmt->fetchColumn();
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} catch (PDOException $e) {
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error_log("Error getting total categories count: " . $e->getMessage());
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throw new Exception("Could not retrieve category count. Please try again later.");
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}
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}
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}
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