<?php
// H:\dev_web\htdocs\t_oci8\ACXE2\equip_graph_img_cre.php
/* Create JPEG image of equipment allocation statistics
Don't have any text or white space before the "<?php" tag
because it will be incorporated into image stream and corrupt picture.
call web service and create a graph.
Change below web service URL to match your system.
*/
define('WEB_SERVICE_URL', "http://dev:8083/t_oci8/ACXE2/equip_getjson_count.php");
session_start();
require('_02autoload.php');
//require('Session.php');
//require('Page.php');
$sess = new \Equipment\Session;
$sess->getSession();
if (!isset($sess->username) || empty($sess->username)
|| !$sess->isPrivilegedUser()) {
header('Location: index.php');
exit;
}
$data = callservice($sess);
do_graph("Equipment Count", 600, $data);
// Functions
function callservice($sess) {
// Call web "service" to get the Equipment statistics
$calldata = array('username' => $sess->username);
$options = array(
'http' => array(
'method' => 'POST',
'header' => 'Content-type: application/x-www-form-urlencoded',
'content' => http_build_query($calldata)
)
);
$ctx = stream_context_create($options);
$result = file_get_contents(WEB_SERVICE_URL, false, $ctx);
if (!$result) {
$data = null;
} else {
$data = json_decode($result, true);
// Sort an array by keys using an anonymous function
uksort($data, function($a, $b) {
if ($a == $b)
return 0;
else
return ($a < $b) ? -1 : 1;
});
}
return($data);
}
function do_graph($title, $width, $items) {
$border = 50; // border space around bars
$caption_gap = 4; // space between bar and its caption
$bar_width = 20; // width of each bar
$bar_gap = 40; // space between each bar
$title_font_id = 5; // font id for the main title
$bar_caption_font_id = 5; // font id for each bar's title
// Image height depends on number of items
$height = (2 * $border) + (count($items) * $bar_width) +
((count($items) - 1) * $bar_gap);
// Find horizontal distance unit for one item
$unit = ($width - (2 * $border)) / max($items);
// Create image and add the title
$im = ImageCreate($width, $height);
if (!$im) {
trigger_error("Cannot create image<br />\n", E_USER_ERROR);
}
$background_col = ImageColorAllocate($im, 255, 255, 255); // white
$bar_col = ImageColorAllocate($im, 0, 64, 128); // blue
$letter_col = ImageColorAllocate($im, 0, 0, 0); // black
ImageFilledRectangle($im, 0, 0, $width, $height, $background_col);
ImageString($im, $title_font_id, $border, 4, $title, $letter_col);
// Draw each bar and add a caption
$start_y = $border;
foreach ($items as $caption => $value) {
$end_x = $border + ($value * $unit);
$end_y = $start_y + $bar_width;
ImageFilledRectangle($im, $border, $start_y, $end_x, $end_y, $bar_col);
ImageString($im, $bar_caption_font_id, $border,
$start_y + $bar_width + $caption_gap, $caption, $letter_col);
$start_y = $start_y + ($bar_width + $bar_gap);
}
// Output complete image.
// Any text, error message or even white space that appears before
// this (including any white space before "<?php" tag) will corrupt
// image data. Comment out "header" line to debug any issues.
header("Content-type: image/jpg");
ImageJpeg($im);
ImageDestroy($im);
}
?>
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