corrade-http-templates – Rev 2

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<?php

###########################################################################
##  Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3      ##
###########################################################################
## This is a script that stores group messages to a local file that can  ##
## then be read-in by other scripts and displayed. The script will only  ##
## write to a file "chat.log" in the current directory and the name of   ##
## the chat log ("chat.log") is hard-coded because it depends on this    ##
## script's HTML counter-part that has the name hard-coded too.          ##
###########################################################################

###########################################################################
##                            CONFIGURATION                              ##
###########################################################################

# Set this to the name of the group.
$GROUP = 'My Group';
# How many chat lines to store?
$CHAT_LINES = 10;
# Set this to the group password.
$PASSWORD = 'mypassword';
# Set this to Corrade's HTTP Server URL.
$URL = 'http://corrade.hostname:8080';

###########################################################################
##                               INTERNALS                               ##
###########################################################################

# Check if this is the group chat notification.
if(!isset($_POST['type']) || $_POST['type'] != "group") return;
# Check that the notification is for the configured group.
if(!isset($_POST['group']) || $_POST['group'] != $GROUP) return;
# Bail if "firstname", "lastname" or the "message" variables are blank.
if($_POST['firstname'] == '' 
    || $_POST['lastname'] == '' 
    || $_POST['message'] == '') return;

###########################################################################
##  Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3      ##
###########################################################################
function atomized_put_contents($file, $data) {
    $fp = fopen($file, "w+");
    if (flock($fp, LOCK_EX)) {
        fwrite($fp, $data);
        fflush($fp);
        flock($fp, LOCK_UN);
    }
    fclose($fp);
}
###########################################################################
##  Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3      ##
###########################################################################
function atomized_get_contents($file) {
    $fp = fopen($file, "r+");
    $ct = '';
    if (flock($fp, LOCK_SH)) {
        if (filesize($file)) {
            $ct = fread($fp, filesize($file));
        }
        flock($fp, LOCK_UN);
    }
    fclose($fp);
    return $ct;
}

####
# I. Initialize a new blank array.
$data = array();

####
# II. If the file exists, trim it to the number of chat lines.
switch(file_exists("chat.log")) {
    case TRUE:
        # Open the chat log and trim the lines to the configured line size.
        $data = explode(
            PHP_EOL, 
            atomized_get_contents(
                    "chat.log"
            )
        );
        while(sizeof($data) > $CHAT_LINES)
            array_shift($data);
        break;
}

####
# III. Add the line at the end including the date.
array_push(
    $data, 
    sprintf(
        "[%s:%s] %s %s : %s",
        date("H"),
        date("i"),
        $_POST['firstname'], 
        $_POST['lastname'], 
        $_POST['message']
    )
);

####
# IV. Now dump the array to the file.
atomized_put_contents(
    "chat.log", 
    implode(
        PHP_EOL, 
        $data
    )
);

?>