commit 5a54fe251d55dffde9d386fcefdb4663d7363e76
Author: garrettmills <shout@garrettmills.dev>
Date:   Sun Dec 6 13:58:02 2020 -0600

    Initial commit

diff --git a/AdminHome.html b/AdminHome.html
new file mode 100644
index 0000000..639db62
--- /dev/null
+++ b/AdminHome.html
@@ -0,0 +1,17 @@
+<?php
+
+require './configuration.php';
+
+$page = new common\Page;
+
+$page->title('EECS 448 Lab 10 - Exercise 4')
+    ->header('Admin Home')
+    ->writes("
+        <ul>
+            <li><a href=\"" . system_url('ViewUsers.php') . "\">View Users</a></li>
+            <li><a href=\"" . system_url('ViewUserPosts.html') . "\">View Posts by User</a></li>
+            <li><a href=\"" . system_url('DeletePost.html') . "\">Delete Posts</a></li>
+        </ul>
+    ");
+
+$page->write();
diff --git a/CreatePosts.html b/CreatePosts.html
new file mode 100644
index 0000000..915451a
--- /dev/null
+++ b/CreatePosts.html
@@ -0,0 +1,16 @@
+<?php
+
+require_once './configuration.php';
+
+$page = new common\Page;
+
+$page->title('Exercise 3 - EECS 448 Lab 10')
+    ->header('Create a New Post')
+    ->div(function() use($page) {
+        $page->form(system_url('CreatePosts.php'), function() use($page) {
+            $page->writes('<input type="text" name="username" placeholder="Username" required/>')->line_break();
+            $page->writes('<textarea name="content" placeholder="Post content" required></textarea>')->line_break();
+            $page->submit();
+        });
+    })
+    ->write();
diff --git a/CreatePosts.php b/CreatePosts.php
new file mode 100644
index 0000000..e378668
--- /dev/null
+++ b/CreatePosts.php
@@ -0,0 +1,35 @@
+<?php
+
+require_once './configuration.php';
+
+$request = common\Request::capture();
+$page = new common\Page;
+$users = new app\UserRepository;
+$posts = new app\PostRepository;
+
+$page->title('Exercise 3 - EECS 448 Lab 10')
+    ->header('Create a New Post');
+
+if ( !$request->input('username') ) {
+    $page->fail_to('You must specify the username.', system_url('CreatePosts.html'));
+}
+
+if ( !$request->input('content') ) {
+    $page->fail_to('You must specify post content.', system_url('CreatePosts.html'));
+}
+
+$user = $users->find_one([ 'username' => $request->input('username') ]);
+if ( !$user ) {
+    $page->fail_to('Sorry, a user with that username does not exist.', system_url('CreatePosts.html'));
+}
+
+$post = $posts->save([
+    'user_id' => $user['user_id'],
+    'content' => $request->input('content'),
+]);
+
+$page->div(function() use($page) {
+    $page->writes('Post created successfully.');
+});
+
+$page->write();
diff --git a/CreateUser.html b/CreateUser.html
new file mode 100644
index 0000000..e718141
--- /dev/null
+++ b/CreateUser.html
@@ -0,0 +1,14 @@
+<?php
+
+require_once './configuration.php';
+
+$page = new common\Page();
+
+$page->title('Exercise 2 - EECS 448 Lab 10')
+    ->header('Create a New User')
+    ->form(system_url('CreateUser.php'), function() use($page) {
+        $page->writes('<input type="text" placeholder="Username" name="username" required/>');
+        $page->submit();
+    });
+
+$page->write();
diff --git a/CreateUser.php b/CreateUser.php
new file mode 100644
index 0000000..ea5e34d
--- /dev/null
+++ b/CreateUser.php
@@ -0,0 +1,29 @@
+<?php
+
+require_once './configuration.php';
+
+$request = common\Request::capture();
+$page = new common\Page;
+$users = new app\UserRepository;
+
+$page->title('Exercise 2 - EECS 448 Lab 10')
+    ->header('Create a New User');
+
+if ( !$request->input('username') ) {
+    $page->fail_to('You must specify a username.', system_url('CreateUser.html'));
+}
+
+$existing_user = $users->find_one([ 'username' => $request->input('username') ]);
+if ( $existing_user ) {
+    $page->fail_to('A user with that username already exists.', system_url('CreateUser.html'));
+}
+
+$new_user = $users->save([
+    'username' => $request->input('username'),
+]);
+
+$page->div(function() use($page, $new_user) {
+    $page->writes('User ' . $new_user['username'] . ' created successfully.');
+});
+
+$page->write();
diff --git a/DeletePost.html b/DeletePost.html
new file mode 100644
index 0000000..1cde34e
--- /dev/null
+++ b/DeletePost.html
@@ -0,0 +1,41 @@
+<?php
+
+require './configuration.php';
+
+$db = new common\database\Connection;
+$db->connect();
+
+$page = new common\Page;
+
+$page->title('EECS 448 Lab 10 - Exercise 7')
+    ->header('Delete Posts');
+
+$query = "SELECT post.post_id, user.username, post.content
+            FROM posts post
+            LEFT JOIN users user
+                ON user.user_id = post.post_id";
+                
+$results = $db->fetch($query);
+
+$post_display = array_merge([
+    ['Post ID', 'Username', 'Content', 'Delete?'],
+], array_map(function($post) {
+    $id = 'post-' . $post['post_id'];
+
+    return [
+        $post['post_id'],
+        $post['username'],
+        $post['content'],
+        '<input type="checkbox" id="' . $id . '" name="' . $id . '" value="yes">
+         <label for="' . $id . '">Delete</label>'
+    ];
+}, $results));
+
+$page->writes('<p>Select the posts you want to delete.')
+    ->form(system_url('DeletePost.php'), function() use($page, $post_display) {
+        $page->table($post_display)
+            ->writes('<br>')
+            ->submit();
+    });
+
+$page->write();
diff --git a/DeletePost.php b/DeletePost.php
new file mode 100644
index 0000000..ce51b30
--- /dev/null
+++ b/DeletePost.php
@@ -0,0 +1,24 @@
+<?php
+
+require './configuration.php';
+
+$request = common\Request::capture();
+$page = new common\Page;
+$posts = new app\PostRepository;
+
+$post_ids = [];
+foreach ( $request->input() as $post_key => $value ) {
+    if ( $value !== 'yes' ) continue;
+
+    $post_id = explode('-', $post_key)[1];
+    $post_ids[] = $post_id;
+
+    $posts->delete(['post_id' => $post_id]);
+}
+
+$page->title('EECS 448 Lab 10 - Exercise 7')
+    ->header('Posts Deleted')
+    ->writes('<p>Posts with the following IDs were deleted: ' . implode(', ', $post_ids) . '</p>')
+    ->writes('<a href="' . system_url('AdminHome.html') . '">Admin Home</a>');
+
+$page->write();
diff --git a/ViewUserPosts.html b/ViewUserPosts.html
new file mode 100644
index 0000000..a225a65
--- /dev/null
+++ b/ViewUserPosts.html
@@ -0,0 +1,26 @@
+<?php
+
+require './configuration.php';
+
+$page = new common\Page;
+$users = new app\UserRepository;
+
+// Generate the user options
+$user_options = array_map(function($user) {
+    return '<option value="' . $user['user_id'] . '">' . $user['username'] . '</option>';
+}, $users->find());
+
+$page->title('EECS 448 Lab 10 - Exercise 6')
+    ->header('View Posts by User')
+    ->form(system_url('ViewUserPosts.php'), function() use($page, $user_options) {
+        $page->writes('
+            <label for="user-select">Select a user:</label>
+            <select name="user_id" id="user-select" style="min-width: 300px;" required>
+                ' . implode("\n", $user_options) . '
+            </select>
+        ');
+
+        $page->submit();
+    });
+
+$page->write();
diff --git a/ViewUserPosts.php b/ViewUserPosts.php
new file mode 100644
index 0000000..de08720
--- /dev/null
+++ b/ViewUserPosts.php
@@ -0,0 +1,44 @@
+<?php
+
+require './configuration.php';
+
+$request = common\Request::capture();
+$page = new common\Page;
+$users = new app\UserRepository;
+$posts = new app\PostRepository;
+
+$page->title('EECS 448 Lab 10 - Exercise 6')
+    ->header('View Posts by User');
+
+if ( !$request->input('user_id') ) {
+    $page->fail_to('Please select a user.', system_url('ViewUserPosts.html'));
+}
+
+$user = $users->find_by_id($request->input('user_id'));
+
+if ( !$user ) {
+    $page->fail_to('Invalid user.', system_url('ViewUserPosts.html'));
+}
+
+$user_posts = $posts->find([
+    'user_id' => $user['user_id'],
+]);
+
+$post_display = array_merge([
+    ['Post ID', 'Post Content']
+], array_map(function($post) {
+    return [$post['post_id'], $post['content']];
+}, $user_posts));
+
+
+$page->div(function() use($page, $user) {
+    $page->writes('<b>Posts by ' . $user['username'] . ':</b>');
+});
+
+$page->table($post_display);
+
+$page->div(function() use($page) {
+    $page->writes('<a href="' . system_url('ViewUserPosts.html') . '">Select a different user</a>');
+});
+
+$page->write();
diff --git a/ViewUsers.php b/ViewUsers.php
new file mode 100644
index 0000000..c1727ed
--- /dev/null
+++ b/ViewUsers.php
@@ -0,0 +1,23 @@
+<?php
+
+require './configuration.php';
+
+$page = new common\Page;
+$users = new app\UserRepository;
+
+$page->title('EECS 448 Lab 10 - Exercise 5')
+    ->header('View Registered Users');
+
+$registered_users = $users->find();
+
+$table_display = array_merge([
+    // Add the table headers
+    ['User ID', 'Username'],
+], array_map(function($user) {
+    // Map from associative array to keyed
+    return array_values($user);
+}, $registered_users));
+
+$page->table($table_display);
+
+$page->write();
diff --git a/app/PostRepository.php b/app/PostRepository.php
new file mode 100644
index 0000000..1b76b2a
--- /dev/null
+++ b/app/PostRepository.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace app;
+
+use common\database\Repository;
+
+class PostRepository extends Repository {
+    protected $table = 'posts';
+    protected $primary_key = 'post_id';
+    protected $fields = ['post_id', 'user_id', 'content'];
+}
diff --git a/app/UserRepository.php b/app/UserRepository.php
new file mode 100644
index 0000000..f5f9270
--- /dev/null
+++ b/app/UserRepository.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace app;
+
+use common\database\Repository;
+
+class UserRepository extends Repository {
+    protected $table = 'users';
+    protected $primary_key = 'user_id';
+    protected $fields = ['user_id', 'username'];
+}
diff --git a/assets/common.css b/assets/common.css
new file mode 100644
index 0000000..47e3d37
--- /dev/null
+++ b/assets/common.css
@@ -0,0 +1,28 @@
+table, th, td {
+    border: 1px solid darkgrey;
+    border-collapse: collapse;
+}
+
+th, td {
+    padding: 10px;
+}
+
+div.common-page {
+    margin: 15px;
+}
+
+input {
+    padding: 5px;
+    margin: 10px;
+}
+
+button[type=submit] {
+    padding: 5px;
+}
+
+textarea {
+    margin: 10px;
+    padding: 5px;
+    min-width: 400px;
+    min-height: 200px;
+}
diff --git a/common/Page.php b/common/Page.php
new file mode 100644
index 0000000..be1bd02
--- /dev/null
+++ b/common/Page.php
@@ -0,0 +1,208 @@
+<?php
+
+namespace common;
+
+class Page {
+    protected $_title;
+    protected $_writers = [];
+    protected $_wrote_pre = false;
+    protected $_wrote_post = false;
+    protected $_writing = false;
+    protected $_scripts = [];
+    protected $_styles = [];
+
+    public function calls(callable $writer) {
+        $this->_writers[] = $writer;
+
+        if ( $this->_writing ) {
+            $writer();
+        }
+
+        return $this;
+    }
+
+    public function writes($string) {
+        $this->calls(function() use($string) {
+            echo $string;
+        });
+
+        return $this;
+    }
+
+    public function script($src) {
+        $this->_scripts[] = $src;
+        return $this;
+    }
+
+    public function stylesheet($src) {
+        $this->_styles[] = $src;
+        return $this;
+    }
+
+    public function title($title = null) {
+        if ( $title ) {
+            $this->_title = $title;
+            return $this;
+        } else {
+            return $this->_title;
+        }
+    }
+
+    public function header($string = null) {
+        if ( !$string ) $string = $this->title();
+
+        return $this->writes('<h1>' . $string . '</h1>');
+    }
+
+    public function form($submit, callable $inner) {
+        $this->writes('<form method="POST" action="' . $submit . '">');
+        $this->calls($inner);
+        $this->writes('</form>');
+        return $this;
+    }
+
+    public function submit($text = 'Submit') {
+        $this->writes('<button type="submit">' . $text . '</button>');
+    }
+
+    public function div(callable $inner) {
+        $this->writes('<div class="common-page">');
+        $this->calls($inner);
+        $this->writes('</div>');
+        return $this;
+    }
+
+    public function line_break() {
+        $this->writes('<br/>');
+        return $this;
+    }
+
+    public function table($nested_array) {
+        if ( is_array($nested_array) ) {
+            $this->calls(function() use($nested_array) {
+                echo '<table style="width: 100%;">';
+    
+                foreach ( $nested_array as $row_idx => $row ) {
+                    echo '<tr>';
+    
+                    foreach ( $row as $col_idx => $col ) {
+                        $tag = $row_idx === 0 ? 'th' : 'td';
+    
+                        echo "<{$tag}>{$col}</{$tag}>";
+                    }
+    
+                    echo '</tr>';
+                }
+    
+                echo '</table>';
+            });
+        } else {
+            $this->writes('<table style="width: 100%;">');
+            $this->calls($nested_array);
+            $this->writes('</table>');
+        }
+
+        return $this;
+    }
+
+    public function table_row_cell(callable $inner, $span = 1) {
+        $this->table_row(function() use($inner, $span) {
+            $this->writes('<td colspan="' . $span . '">');
+            $this->calls($inner);
+            $this->writes('</td>');
+        });
+
+        return $this;
+    }
+
+    public function table_row($inner = null) {
+        $this->writes('<tr>');
+        if ( $inner ) $this->calls($inner);
+        $this->writes('</tr>');
+
+        return $this;
+    }
+
+    public function table_head(callable $inner) {
+        $this->writes('<th>');
+        $this->calls($inner);
+        $this->writes('</th>');
+
+        return $this;
+    }
+
+    public function table_cell($inner = null) {
+        $this->writes('<td>');
+        if ( $inner ) $this->calls($inner);
+        $this->writes('</td>');
+
+        return $this;
+    }
+
+    public function fail_to($message, $redirect_url) {
+        $this->writes('<p>' . $message . '</p>')
+            ->writes('<p><a href="' . $redirect_url . '">Try Again</a></p>')
+            ->write();
+
+        exit;
+    }
+
+    public function preamble() {
+        if ( $this->_wrote_pre ) return;
+        $this->_styles[] = system_url('assets/common.css');
+
+        $styles = [];
+        foreach ( $this->_styles as $style ) {
+            $styles[] = '<link rel="stylesheet" href="' . $style . '"/>';
+        }
+
+        ?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title><?= $this->_title ?></title>
+        <?= implode("\n", $styles) ?>
+    </head>
+    <body>
+        <?php
+
+        $this->_wrote_pre = true;
+    }
+
+    public function postamble() {
+        if ( $this->_wrote_post ) return;
+
+        $scripts = [];
+        foreach ( $this->_scripts as $script ) {
+            $scripts[] = '<script src="' . $script . '"></script>';
+        }
+
+        ?>
+        <?= implode("\n", $scripts) ?>
+    </body>
+</html>
+        <?php
+
+        $this->_wrote_post = true;
+    }
+
+    public function write() {
+        $this->_writing = true;
+        $this->preamble();
+        foreach ( $this->_writers as $writer ) {
+            $writer();
+        }
+        $this->postamble();
+        $this->_writing = false;
+    }
+
+    public function compile() {
+        ob_start();
+        $this->_wrote_pre = false;
+        $this->_wrote_post = false;
+        $this->write();
+        $this->_wrote_pre = false;
+        $this->_wrote_post = false;
+        return ob_get_clean();
+    }
+}
diff --git a/common/Request.php b/common/Request.php
new file mode 100644
index 0000000..f8f689f
--- /dev/null
+++ b/common/Request.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace common;
+
+class Request {
+    protected $_get = [];
+    protected $_post = [];
+
+    public static function capture() {
+        $req = new static();
+        $req->_get = $_GET;
+        $req->_post = $_POST;
+        return $req;
+    }
+
+    public function input($path = null) {
+        if ( !$path ) {
+            return array_merge($this->_get, $this->_post);
+        }
+
+        $path_parts = explode('.', $path);
+
+        $get_value = $this->_get;
+        foreach ( $path_parts as $part ) {
+            if ( $get_value ) {
+                $get_value = $get_value[$part];
+            }
+        }
+
+        $post_value = $this->_post;
+        foreach ( $path_parts as $part ) {
+            if ( $post_value ) {
+                $post_value = $post_value[$part];
+            }
+        }
+
+        if ( $get_value ) return $get_value;
+        if ( $post_value ) return $post_value;
+    }
+}
diff --git a/common/autoload.php b/common/autoload.php
new file mode 100644
index 0000000..c3237e6
--- /dev/null
+++ b/common/autoload.php
@@ -0,0 +1,20 @@
+<?php
+
+class AutoLoad {
+    public static function load($class_name) {
+        $file = str_replace("\\", '/', $class_name) . '.php';
+        $path = system_path($file);
+
+        if ( file_exists($path) ) {
+            include_system($file, false);
+
+            if ( class_exists($class_name) ) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+
+spl_autoload_register('AutoLoad::load');
diff --git a/common/database/Connection.php b/common/database/Connection.php
new file mode 100644
index 0000000..9b84848
--- /dev/null
+++ b/common/database/Connection.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace common\database;
+
+class Connection {
+    protected static $mysqli;
+
+    protected $config;
+
+    function __construct() {
+        $this->config = config('database');
+    }
+
+    public function connect() {
+        if ( !static::$mysqli ) {
+            static::$mysqli = new \mysqli(
+                $this->config['url'],
+                $this->config['username'],
+                $this->config['password'],
+                $this->config['database']
+            );
+        }
+
+        if ( static::$mysqli->connect_errno ) {
+            throw new \Exception('Unable to connect to database: ' . static::$mysqli->connect_error);
+        }
+    }
+
+    public function escape($value) {
+        return static::$mysqli->real_escape_string($value);
+    }
+
+    public function execute($query, $args = [], $returns_statement = false) {
+        $statement = static::$mysqli->prepare($query);
+
+        if ( sizeof($args) > 0 ) {
+            $types = '';
+            foreach ( $args as $arg ) {
+                if ( is_int($arg) ) {
+                    $types .= 'i';
+                } else if ( is_float($arg) || is_double($arg) ) {
+                    $types .= 'd';
+                } else if ( is_string($arg) ) {
+                    $types .= 's';
+                } else {
+                    $types .= 'b';
+                }
+            }
+
+            $statement->bind_param($types, ...$args);
+        }
+
+        $statement->execute();
+
+        if ( $returns_statement ) return $statement;
+        return $statement->get_result();
+    }
+
+    public function insert($query, $args = []) {
+        $statement = $this->execute($query, $args, true);
+        return $statement->insert_id;
+    }
+
+    public function fetch($query, $args = []) {
+        $result = $this->execute($query, $args);
+
+        $rows = [];
+        while ( $row = $result->fetch_assoc() ) {
+            $rows[] = $row;
+        }
+
+        return $rows;
+    }
+
+    public function close() {
+        if ( static::$mysqli ) {
+            static::$mysqli->close();
+            static::$mysqli = null;
+        }
+    }
+}
diff --git a/common/database/Repository.php b/common/database/Repository.php
new file mode 100644
index 0000000..8cb2266
--- /dev/null
+++ b/common/database/Repository.php
@@ -0,0 +1,134 @@
+<?php
+
+namespace common\database;
+
+class Repository {
+    protected $table;
+    protected $primary_key;
+    protected $fields = [];
+
+    protected $connection;
+
+    function __construct() {
+        $this->connection = new Connection();
+        $this->connection->connect();
+    }
+
+    function __destruct() {
+        $this->connection->close();
+    }
+
+    public function create($record) {
+        $fields = [];
+        $arg_parts = [];
+        $args = [];
+
+        foreach ( $this->fields as $field ) {
+            if ( isset($record[$field]) ) {
+                $fields[] = $field;
+                $args[] = $record[$field];
+                $arg_parts[] = '?';
+            }
+        }
+
+        $query = 'INSERT INTO ' . $this->table . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $arg_parts) . ')';
+        $insert_id = $this->connection->insert($query, $args);
+
+        $record[$this->primary_key] = $insert_id;
+        return $record;
+    }
+
+    public function find_by_id($primary_key) {
+        $query = 'SELECT ' . implode(', ', $this->fields) . ' FROM ' . $this->table . ' WHERE ' . $this->primary_key . ' = ?';
+        $results = $this->connection->fetch($query, [$primary_key]);
+
+        if ( sizeof($results) > 0 ) {
+            return $results[0];
+        }
+    }
+
+    public function find($filter = []) {
+        $query = 'SELECT ' . implode(', ', $this->fields) . ' FROM ' . $this->table . ' WHERE ';
+        list($wheres, $where_args) = $this->build_wheres_from_filter($filter);
+
+        $query .= implode(' AND ', $wheres);
+        $query .= ' ORDER BY ' . $this->primary_key . ' ASC';
+        return $this->connection->fetch($query, $where_args);
+    }
+
+    public function find_one($filter = []) {
+        $query = 'SELECT ' . implode(', ', $this->fields) . ' FROM ' . $this->table . ' WHERE ';
+        list($wheres, $where_args) = $this->build_wheres_from_filter($filter);
+
+        $query .= implode(' AND ', $wheres) . ' LIMIT 1';
+        $results = $this->connection->fetch($query, $where_args);
+
+        if ( sizeof($results) > 0 ) {
+            return $results[0];
+        }
+    }
+
+    public function update($record) {
+        $query = 'UPDATE ' . $this->table . ' SET ';
+        $query_args = [];
+
+        $sets = [];
+        foreach ( $this->fields as $field ) {
+            if ( isset($record[$field]) ) {
+                $sets[] = $field . '=?';
+                $query_args[] = $record[$field];
+            }
+        }
+
+        $query = 'UPDATE ' . $this->table . ' SET ' . implode(', ', $sets) . ' WHERE ' . $this->primary_key . ' = ?';
+        $query_args[] = $record[$this->primary_key];
+
+        $this->connection->execute($query, $query_args);
+        return $record;
+    }
+
+    public function save($record) {
+        if ( isset($record[$this->primary_key]) ) {
+            return $this->update($record);
+        } else {
+            return $this->create($record);
+        }
+    }
+
+    public function delete($record) {
+        $primary_key = $record[$this->primary_key];
+
+        $query = 'DELETE FROM ' . $this->table . ' WHERE ' . $this->primary_key . ' = ?';
+        $this->connection->execute($query, [$primary_key]);
+    }
+
+    protected function build_wheres_from_filter($filter = []) {
+        if ( !$filter ) {
+            return [['1=1'], []];
+        }
+
+        $wheres = [];
+        $where_args = [];
+        foreach ( $this->fields as $field ) {
+            if ( isset($filter[$field]) ) {
+                $val = $filter[$field];
+
+                if ( is_string($val) || is_numeric($val) ) {
+                    $wheres[] = $field . ' = ?';
+                    $where_args[] = $val;
+                } else if ( is_array($val) ) {
+                    $where_items = [];
+
+                    foreach ( $val as $item ) {
+                        $where_items[] = '?';
+                        $where_args[] = $item;
+                    }
+
+                    $wheres[] = $field . ' IN (' . implode(',', $where_items) . ')';
+                }
+            }
+        }
+
+        return [$wheres, $where_args];
+    }
+}
diff --git a/common/functions_config.php b/common/functions_config.php
new file mode 100644
index 0000000..b395b0e
--- /dev/null
+++ b/common/functions_config.php
@@ -0,0 +1,18 @@
+<?php
+
+function config($path, $default_value = null) {
+    $parts = explode('.', $path);
+
+    if ( !$parts[0] ) {
+        return $default_value;
+    }
+
+    $config = require_system('config/' . $parts[0] . '.php');
+    foreach ( $parts as $i => $part ) {
+        if ( $i !== 0 && $config ) {
+            $config = $config[$part];
+        }
+    }
+
+    return $config;
+}
diff --git a/common/functions_debugging.php b/common/functions_debugging.php
new file mode 100644
index 0000000..88a9280
--- /dev/null
+++ b/common/functions_debugging.php
@@ -0,0 +1,8 @@
+<?php
+
+function dd($something) {
+    echo "<pre><code>";
+    var_dump($something);
+    echo "</code></pre>";
+    exit;
+}
diff --git a/common/functions_system.php b/common/functions_system.php
new file mode 100644
index 0000000..014b344
--- /dev/null
+++ b/common/functions_system.php
@@ -0,0 +1,54 @@
+<?php
+
+function system_root() {
+    $root = dirname(dirname(__FILE__));
+    return $root;
+}
+
+function system_path($path) {
+    if ( $path[0] === '/' ) {
+        $path = substr($path, 1);
+    }
+
+    return implode('/', [system_root(), $path]);
+}
+
+function require_system($path, $once = true) {
+    if ( $once ) {
+        return require_once system_path($path);
+    } else {
+        return require system_path($path);
+    }
+}
+
+function include_system($path, $once = true) {
+    if ( $once ) {
+        return include_once system_path($path);
+    } else {
+        return include system_path($path);
+    }
+}
+
+function system_url($path) {
+    if ( $path[0] === '/' ) {
+        $path = substr($path, 1);
+    }
+
+    return implode('/', [SYSTEM_URL, $path]);
+}
+
+function system_redirect($path) {
+    header('Location: ' . system_url($path));
+    exit;
+}
+
+function no_direct_access() {
+    $key = array_search(__FUNCTION__, array_column(debug_backtrace(), 'function'));
+    $caller_file = debug_backtrace()[$key]['file'];
+
+    if ( $caller_file === $_SERVER['SCRIPT_FILENAME'] ) {
+        header("HTTP/1.1 401 Unauthorized");
+        echo 'Forbidden';
+        exit;
+    }
+}
diff --git a/config/database.php b/config/database.php
new file mode 100644
index 0000000..61a684e
--- /dev/null
+++ b/config/database.php
@@ -0,0 +1,8 @@
+<?php
+
+return [
+    'url' => 'mysql.eecs.ku.edu',
+    'username' => 'garretmills',
+    'password' => '',  // omitted for public repo
+    'database' => 'garretmills',
+];
diff --git a/configuration.php b/configuration.php
new file mode 100644
index 0000000..78d5663
--- /dev/null
+++ b/configuration.php
@@ -0,0 +1,11 @@
+<?php
+
+error_reporting(E_ALL);
+ini_set('display_errors', 1);
+
+!defined('SYSTEM_URL') && define('SYSTEM_URL', 'https://people.eecs.ku.edu/~g582m300/eecs448-lab10');
+
+include_once dirname(__FILE__).'/common/functions_debugging.php';
+include_once dirname(__FILE__).'/common/functions_system.php';
+include_once dirname(__FILE__).'/common/functions_config.php';
+include_once dirname(__FILE__).'/common/autoload.php';
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..767822a
--- /dev/null
+++ b/index.html
@@ -0,0 +1,10 @@
+<html>
+    <body>
+        <h1>Simple Posts</h1>
+        <ul>
+            <li><a href="CreateUser.html">Create User</a></li>
+            <li><a href="CreatePosts.html">Create Post</a></li>
+            <li><a href="AdminHome.html">Admin Home</a></li>
+        </ul>
+    </body>
+</html>