/
db_connect.php
108 lines (96 loc) · 2.58 KB
/
db_connect.php
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<?php
$conn = pg_connect('host=localhost dbname=neo4j_sandbox user=postgres');
if(!$conn) { die('Failed to connect to Postgres'); }
$result = pg_prepare($conn, "user_query", "SELECT * FROM users WHERE name = $1 LIMIT 1");
$result = pg_prepare($conn, "user_by_id", "SELECT * FROM users WHERE id = $1");
$result = pg_prepare($conn, "place_by_id", "SELECT * FROM places WHERE id = $1");
$result = pg_prepare($conn, "place_by_name", "SELECT * FROM places WHERE name = $1 LIMIT 1");
function user($name) {
global $conn;
$result = pg_execute($conn, "user_query", array($name));
$user = array();
while($row = pg_fetch_assoc($result)) {
$user = $row;
}
pg_free_result($result);
return($user);
}
function user_by_id($id) {
global $conn;
$result = pg_execute($conn, "user_by_id", array($id));
$user = array();
while($row = pg_fetch_assoc($result)) {
$user = $row;
}
pg_free_result($result);
return($user);
}
function users() {
global $conn;
$result = pg_query($conn, 'SELECT * FROM users');
$users = array();
while($row = pg_fetch_assoc($result)) {
$users[] = $row;
}
pg_free_result($result);
return($users);
}
function places() {
global $conn;
$result = pg_query($conn, 'SELECT * FROM places');
$places = array();
while($row = pg_fetch_assoc($result)) {
$places[] = $row;
}
pg_free_result($result);
return($places);
}
function place_by_id($id) {
global $conn;
$result = pg_execute($conn, "place_by_id", array($id));
$place = array();
while($row = pg_fetch_assoc($result)) {
$place = $row;
}
pg_free_result($result);
return($place);
}
function place_by_name($name) {
global $conn;
$result = pg_execute($conn, "place_by_name", array($name));
$place = array();
while($row = pg_fetch_assoc($result)) {
$place = $row;
}
pg_free_result($result);
return($place);
}
function friendships() {
global $conn;
$result = pg_query($conn, 'SELECT * FROM friendships');
$friendships = array();
while($row = pg_fetch_assoc($result)) {
$friendships[] = $row;
}
pg_free_result($result);
return($friendships);
}
function create_user($name) {
global $conn;
$user = user($name);
if(empty($user)) {
if(pg_query($conn, sprintf("INSERT INTO users (name) VALUES ('%s')", $name)) !== FALSE) {
return(user($name));
} else {
throw new Exception("Failed to create_user $name");
}
}
}
function create_friendship($user, $friend) {
global $conn;
$insert = sprintf("INSERT INTO friendships (user_id,friend_id) VALUES (%d, %d)",
$user['id'], $friend['id']
);
return(pg_query($conn, $insert) !== FALSE);
}
?>