250 lines
9.2 KiB
PHP
Executable File
250 lines
9.2 KiB
PHP
Executable File
<?php
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/*
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*
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* 2. PLT-Level
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*
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* Overview:
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* This PHP script automates database updates by processing rows marked for action in various tables.
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* It dynamically executes predefined functions based on table-specific instructions stored in the database.
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* Functions are executed in either PHP or Python environments depending on configuration.
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*
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* How It Works:
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* 1. The script queries the `SYS_PRD_BND.Tables` table to determine which tables require processing.
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* 2. For each identified table, it selects rows updated since the last run (based on the `LastUpdated` column).
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* 3. Each row is individually processed through:
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* - PHP-level triggers defined in system-level or database-level code.
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* - Python-level triggers similarly defined.
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* 4. If a trigger modifies the row, the script updates the database with new values.
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* 5. Errors encountered during processing are logged and sent as notifications via Telegram.
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*
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* Tables and Their Purpose:
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* - SYS_PRD_BND.Tables:
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* Defines active tables and their respective PHP or Python trigger codes.
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* Columns: Name, onUpdate_phpCode, onUpdate_pyCode, LastUpdated, LastError
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*
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* - SYS_PRD_BND.Constants:
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* Holds constants that are injected into the PHP environment during execution.
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* Columns: Name, Type, Value
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*
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* - SYS_PRD_BND.SupportFunctions:
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* Stores reusable PHP functions available during trigger execution.
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* Columns: Name, InputArgs_json, PhpCode
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*
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* - SYS_PRD_BND.PyPi:
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* Lists external Python libraries imported into Python trigger execution.
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* Columns: LibName, AliasName
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*
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* Dynamic Tables:
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* - Application-specific tables, each must include at least:
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* - LastUpdated (timestamp for tracking)
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* - Primary key columns for row identification (defined externally)
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*
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* Important Functions:
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* - sendTelegramMessage($message, $dstUsers): Sends notifications to a specified Telegram group.
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* - runProcess($command, $code, &$stdout, &$error): Executes external PHP/Python code securely.
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*
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* Usage:
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* Ensure proper configuration of constants, Telegram bot token, and required Python modules.
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* Regularly schedule this script to automate database maintenance and data integrity tasks.
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*
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*
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*
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*
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* Expects tables:
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* SYS_PRD_BND.Tables (Name, onUpdate_phpCode, onUpdate_pyCode, LastUpdated, LastError)
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* SYS_PRD_BND.Constants (Name, Type, Value)
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* SYS_PRD_BND.SupportFunctions (Name, InputArgs_json, PhpCode)
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* SYS_PRD_BND.PyPi (LibName, AliasName)
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* DynamicTables (LastUpdated, [PrimaryKeyColumns], ...)
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*/
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// Auto-include all files in this folder with extension .inc.php
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foreach(scandir(__DIR__) as $filename) if (substr($filename,-8) == ".inc.php") require_once __DIR__."/$filename";
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/**
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* Processes all active tables, updating rows based on trigger conditions.
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* This function scans each active table, executes dynamic trigger code,
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* and handles errors accordingly.
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*/
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function processAllTheActiveTables() {
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echo "Scanning all the tables that need updating...\n";
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$activeTables = sql("SELECT Name, onUpdate_phpCode, onUpdate_pyCode, LastUpdated FROM SYS_PRD_BND.Tables");
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foreach ($activeTables as $activeTable) {
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processActiveTable($activeTable);
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}
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}
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/**
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* Processes a single active table.
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*/
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function processActiveTable($activeTable) {
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extract($activeTable);
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echo "Found Table: " . greenText($Name) . "\n";
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echo "Scanning rows in table $Name that require trigger execution:\n";
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ensureLastUpdatedColumnExists($Name);
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$rowsToProcess = sql("SELECT * FROM $Name WHERE LastUpdated > '$LastUpdated'");
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foreach ($rowsToProcess as $unprocessedRow) {
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processTableRow($activeTable, $unprocessedRow);
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}
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}
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/**
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* Ensures the 'LastUpdated' column exists, adding it if missing.
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*/
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function ensureLastUpdatedColumnExists($_tableName) {
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echo "Ensuring LastUpdated column is created if not exists..\n";
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list($dbName,$tableName) = (strpos($_tableName,".") ? explode(".",$_tableName) : ["",$_tableName]);
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sql((empty($dbName)?"":"USE $dbName; ")."ALTER TABLE `$tableName` ADD COLUMN IF NOT EXISTS LastUpdated TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP");
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}
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/**
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* Processes an individual row for triggers.
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*/
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function processTableRow($activeTable, $unprocessedRow) {
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$functionName = "handleNew" . str_replace(".", "__", $activeTable["Name"]) . "Row";
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if (function_exists($functionName)) {
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runSystemLevelTrigger($functionName, $activeTable, $unprocessedRow);
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}
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if (!empty($activeTable['onUpdate_phpCode'])) {
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runPHPCodeTrigger($functionName, $activeTable, $unprocessedRow);
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}
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if (!empty($activeTable['onUpdate_pyCode'])) {
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runPythonCodeTrigger($functionName, $activeTable, $unprocessedRow);
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}
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}
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/**
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* Executes system-level PHP trigger function.
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*/
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function runSystemLevelTrigger($functionName, $activeTable, &$row) {
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echo "Calling system-level function " . greenText($functionName) . "\n";
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$error = '';
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if ($functionName($row, $error) === false) {
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updateTriggerError($activeTable['Name'], $error);
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} else {
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clearTriggerError($activeTable['Name']);
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}
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}
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/**
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* Executes database-level dynamic PHP trigger code.
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*/
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function runPHPCodeTrigger($functionName, $activeTable, $row) {
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echo "Running PHP Code trigger...\n";
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$phpCode = generatePHPTriggerCode($functionName, $activeTable['onUpdate_phpCode'], $row);
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$result = runSandboxedPHP($phpCode,$stdout,$stderr);
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handleTriggerExecutionResult($result, $stdout,$stderr,$row, $activeTable);
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}
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/**
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* Executes database-level dynamic Python trigger code.
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*/
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function runPythonCodeTrigger($functionName, $activeTable, $row) {
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$pyCode = generatePythonTriggerCode($functionName, $activeTable['onUpdate_pyCode'], $row);
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$result = runSandboxedPython($pyCode,$stdout,$stderr);
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handleTriggerExecutionResult($result, $stdout, $stderr, $row, $activeTable);
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}
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/**
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* Helper functions implementations.
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*/
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function updateDatabaseRow($tableName, $originalRow, $newRowValue) {
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$pkColsName = getTblPrimaryKeyColName($tableName);
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$pkColsValues = array_map(fn($cName) => $originalRow[$cName], $pkColsName);
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$setStatements = [];
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foreach ($newRowValue as $k => $v) {
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$value = is_numeric($v) ? $v : "'" . str_replace("'", "''", $v) . "'";
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$setStatements[] = "$k = $value";
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}
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$whereStatements = [];
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foreach ($pkColsName as $k) {
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$val = is_numeric($originalRow[$k]) ? $originalRow[$k] : "'" . $originalRow[$k] . "'";
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$whereStatements[] = "$k = $val";
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}
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$sql_instruction = "UPDATE $tableName SET " . implode(", ", $setStatements) . " WHERE " . implode(" AND ", $whereStatements);
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sql($sql_instruction);
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}
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function updateTriggerError($tableName, $error) {
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sql("UPDATE SYS_PRD_BND.Tables SET LastError = '" . str_replace("'", '"', $error) . "', LastUpdated = NOW() WHERE Name = '$tableName'");
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sendTelegramMessage("*ERROR* on trigger function for table $tableName : " . $error, "DatabaseGroup");
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}
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function clearTriggerError($tableName) {
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sql("UPDATE SYS_PRD_BND.Tables SET LastError = '', LastUpdated = NOW() WHERE Name = '$tableName'");
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}
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function getConstantsDefinition() {
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$constants = "";
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foreach (sql("SELECT Name, Type, Value FROM SYS_PRD_BND.Constants") as $const) {
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$value = $const["Type"] != "String" ? $const["Value"] : '"' . $const["Value"] . '"';
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$constants .= "define(\"{$const['Name']}\", $value);\n";
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}
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return $constants;
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}
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function getSupportFunctionsDefinition() {
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$supportFunctions = "";
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foreach (sql("SELECT Name, InputArgs_json, PhpCode FROM SYS_PRD_BND.SupportFunctions WHERE PhpCode IS NOT NULL") as $f) {
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$args = implode(", ", array_map(fn($s) => "\$$s", array_keys(json_decode($f["InputArgs_json"], true))));
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$supportFunctions .= "function {$f['Name']}($args) {\n{$f['PhpCode']}\n}\n";
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}
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return $supportFunctions;
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}
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function getPythonImports() {
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$imports = "";
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foreach (sql("SELECT LibName, AliasName FROM SYS_PRD_BND.PyPi") as $module) {
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$alias = !empty($module["AliasName"]) ? " as {$module['AliasName']}" : "";
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$imports .= "import {$module['LibName']}{$alias}\n";
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}
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return $imports;
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}
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function greenText($string) { $green = "\033[0;32m"; $reset = "\033[0m"; return $green . $string . $reset ; }
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function blueText($string) { $green = "\033[0;34m"; $reset = "\033[0m"; return $green . $string . $reset ; }
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function redText($string) { $green = "\033[0;31m"; $reset = "\033[0m"; return $green . $string . $reset ; }
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function sendTelegramMessage($message, $dstUsers) {
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global $BOT_TOKEN, $CHAT_IDS;
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if (is_string($dstUsers)) $dstUsers = [$dstUsers];
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foreach($dstUsers as $dstUser) {
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if (!isset($CHAT_IDS[$dstUser]))
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continue;
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else
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$CHAT_ID = $CHAT_IDS[$dstUser];
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$JSON_RAW_DATA = json_encode([
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'chat_id' => $CHAT_ID,
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'text' => $message,
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'parse_mode' => 'markdown'
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]);
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$curl = curl_init();
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curl_setopt($curl, CURLOPT_URL, "https://api.telegram.org/bot$BOT_TOKEN/sendMessage");
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curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
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curl_setopt($curl, CURLOPT_POST, 1);
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curl_setopt($curl, CURLOPT_POSTFIELDS, $JSON_RAW_DATA);
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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$response = curl_exec($curl);
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//print_r($response);
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curl_close($curl);
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}
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}
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