146 lines
4.1 KiB
PHP
146 lines
4.1 KiB
PHP
<?php
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/* This file is free software: you can redistribute it and/or modify
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it under the terms of version 3 of the GNU Affero General Public License as published by the Free Software Foundation.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details. */
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// -------------------------------------
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// connection setup
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// create the dsn from values in /config.php
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$dsn = $GLOBALS['db_type'] . ":"
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. $GLOBALS['db_host']
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. $GLOBALS['db_port']
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. $GLOBALS['db_socket']
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. $GLOBALS['db_name']
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. "charset=utf8mb4";
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$pdo = (new PDO($dsn, $GLOBALS['db_user'], $GLOBALS['db_pass'],
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$GLOBALS['db_args']));
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// -------------------------------------
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// table setup
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// create needed tables, if nonexistant
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if (!db_table_existant("lusers")) {
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db_create_table("lusers",
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array("id int primary key","username varchar(20)",
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"biography longtext","email varchar(50)","website varchar(50)",
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"hash char(60)","full_name varchar(50)",
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"class varchar(20)")); }
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if (!db_table_existant("posts")) {
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db_create_table("posts",
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array("id int primary key","title varchar(200)","date datetime",
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"user int","text longtext")); }
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if (!db_table_existant("comments")) {
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db_create_table("comments",
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array("id int primary key","displayname varchar(20)",
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"user int","text longtext", "date datetime")); }
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// -------------------------------------
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// STRING --> ARRAY
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// Execute a DB command
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function db_cmd($query) {
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$stmt = $GLOBALS['pdo']->query($query);
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$stack = array();
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if (is_bool($stmt)) {
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return $stmt;
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} else {
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return $stmt->fetchAll();
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}
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}
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// -------------------------------------
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// STRING STRING --> ARRAY
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// Return all values of a specific column
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function db_get_columns($table, $column) {
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$result = db_cmd("select " . $column . " from " . $table);
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$result_nest = function($array) {
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return $array[0];
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};
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if (is_array($result)) {
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return array_map($result_nest, $result);
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} else {
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return $result;
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}
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}
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// STRING STRING VARYING --> ARRAY
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// Return all rows that have an 'identifier' column set to given value
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function db_get_rows($table, $identifier, $value) {
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return db_cmd("select * from " . $table . " where " . $identifier .
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" = " . $value . ";");
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}
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// STRING STRING VARYING STRING --> ARRAY
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// Return the value of a specific column in a given row, identified by an
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// 'identifier' column set to the given value
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function db_get_cell($table, $identifier, $value, $cell) {
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return db_get_rows($table, $identifier, $value)[0][$cell];
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}
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// --------------------------------------
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// STRING STRING VARYING STRING VARYING --> NIL
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// Edit the value of a cell
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function db_set_cell($table, $identifier, $value, $cell, $new_value) {
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if (is_string($value)) { $value = "'" . $value . "'"; }
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if (is_string($new_value)) { $new_value = "'" . $new_value . "'"; }
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return db_cmd("update " . $table
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. " set " . $cell . " = " . $new_value
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. " where " . $identifier . " = " . $value) . ";";
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}
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// -------------------------------------
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// STRING ARRAY ARRAY --> BOOLEAN
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// Create a table with given values to given columns.
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// First array is a list of columns (as would be provided to SQL), and the
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// second is the list of values (as would follow " values " in SQL)
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function db_insert_row($table, $variables, $values) {
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$variables = comma_sep($variables);
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$values = comma_sep(strings_wrap($values));
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return db_cmd("insert into " . $table
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. " (". $variables .")"
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. " values ("
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. $values . ")" . ";");
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}
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// -------------------------------------
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// STRING --> BOOLEAN
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// Return whether or not a table of given name exists
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function db_table_existant($table) {
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if (!db_cmd("select * from information_schema.tables "
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. " where table_name = " . string_wrap($table) . ";")) {
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return false;
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} else {
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return true;
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}
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}
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// STRING ARRAY --> BOOLEAN
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// Create a table of given name and columns (with array of column-strings)
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function db_create_table($table, $columns) {
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return db_cmd("create table " . $table
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. " (" . comma_sep($columns) . ");");
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}
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?>
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