function createVisual($con)
{
$nodes = checkNodesGlobalVariable($con);
$products = checkProductsGlobalVariable($con);
$pairs = '';
$visual = '';
$betweenness = getBetweenness();
foreach ($nodes as $row) {
$visual .= 'n' . $row['id'] . '{';
//set node visual properties
$visual .= 'shape:dot, color:' . genColor($row['links'], $betweenness[0], $betweenness[1]) . ', ';
// set serves and requests
if ($row['serves']) {
$visual .= 'serves: ' . str_replace('^', ', ', $row['serves']) . ',';
}
if ($row['requests']) {
$visual .= ' requests: ' . str_replace('^', ', ', $row['requests']) . ',';
}
// set wealth
$visual .= ' money: ' . $row['money'];
// add new-lines
$visual .= "}\n\n";
// set links
if (isset($row['links'])) {
foreach (explode(',', $row['links']) as $value) {
// hacky solution, but avoids duplicates by searching for a simple |n0-n1| pairs in a string
if (strpos($pairs, '|n' . $value . '-n' . $row['id'] . '|') === false) {
$pairs .= '|n' . $row['id'] . '-n' . $value . '|';
$visual .= 'n' . $row['id'] . "--n{$value} {color: #777777, weight: 1.5}\n\n";
}
}
}
}
return $visual;
}
function consumerPhase($con)
{
global $nodes;
$nodes = checkNodesGlobalVariable($con);
// retrieve a list of lists representing an economic path from producer to consumer
$consumer_path = getConsumerPath($con, $nodes);
// make transaction for each possible consumer
finalizeTransaction($con, $consumer_path);
// unset $consumer_path array once it is not used anymore
unset($consumer_path);
}
function getConsumerPath($con)
{
global $nodes;
$nodes = checkNodesGlobalVariable($con);
$consumer_path = [];
addToLog("\n\n\n;--------------------------------\n; ESTABLISHING TRANSACTION PATH\n;--------------------------------");
for ($b = 0; $b < sizeof($nodes); $b++) {
$list = [];
$providers = getProviders($b);
for ($p = 0; $p < sizeof($providers); $p++) {
if ($providers[$p] != null) {
$list = array_merge($list, array(BFS($b, $providers[$p])));
} else {
echo "<br />No providers found for {$b} <br /><br />";
}
}
$consumer_path = array_merge($consumer_path, $list);
addToLog("\n\n" . implode("\n", str_replace(',', ' -> ', $list)));
}
return $consumer_path;
}
function read_CSV($content, $con)
{
global $nodes;
global $products;
$nodes = checkNodesGlobalVariable($con);
$products = checkProductsGlobalVariable($con);
// get all the lines of the csv file
$lines = explode("\n", $content);
// get rid of first line of the file within the varable
$lines = removeNormalizationFlag($lines);
// get the number of nodes
$node_count = sizeof(explode(";", $lines[0])) - 1;
// get rid of first line of the file | DON'T NEED ANYMORE
array_shift($lines);
// iterate through all the lines of the file
// line $i corresponds to $nodes[$i]'s $links
for ($i = 0; $i < $node_count; $i++) {
// get corresponding line
$line_links = explode(";", $lines[$i]);
// get rid of first element | REDUNDANT
array_shift($line_links);
// prepare variables corresponding to table fields
$ID = '';
$links = '';
$requests = '';
$serves = '';
$quantity = '';
$money = '';
//set ID
$ID = $i;
//set links
// TODO!: when a node has 0 links, $links will be empty and will cause an error
for ($j = 0; $j < $node_count; $j++) {
if ($line_links[$j] != 0) {
// node $i has link to node $j
$links .= $j . ',';
}
}
//remove tailing ','
$links = trim($links, ',');
//set serves and quantity
$idx = empty($products) ? 0 : floor(frand(sizeof($products)) % sizeof($products));
$serves = 'P' . $idx;
$quantity = floor(mt_rand(20, 70));
// update global quantity for served product
$products[$idx]['global_quantity'] += $quantity;
//set requests if $products is not an empty array
if (!empty($products)) {
for ($j = 0; $j < sizeof($products); $j++) {
//for each product randomize if product is requested
//a node may not request the product it produces
if (floor(frand(3, 5, 7, 3)) % 2 == 0 && $idx != $j) {
//set product ID
$request = 'P' . $j . '|';
//set quantity
$request .= ceil(frand(10)) . '|';
//set priority
$request .= floor(frand(25)) % 3 . '^';
$requests .= $request;
}
}
//remove tailing '^'
$requests = trim($requests, '^');
}
// REQUEST FAILSAFE
if ($requests === '') {
//set product ID
$requests = 'P' . generateProductFailSafe($i, $idx) . '|';
//set quantity
$requests .= ceil(frand(10)) . '|';
//set priority
$requests .= floor(frand(25)) % 3;
}
// set money
$money = mt_rand(100, 200);
//commit to DB
execute_sql('<create_initial_arbor.php>', $con, "INSERT INTO nodes (ID, links, requests, serves, quantity, money) VALUES ('" . $ID . "', '" . $links . "', '" . $requests . "', '" . $serves . "', '" . $quantity . "', '" . $money . "')");
}
/// INSERET PRODUCTS CALCULATIONS HERE
foreach ($products as $p) {
$base_cost = calc_base_cost($p['max_cost'], $p['global_quantity'], 1);
execute_sql('<create_initial_products.php>', $con, "UPDATE products SET base_cost='" . $base_cost . "', global_quantity='" . $p['global_quantity'] . "' WHERE name='" . $p['name'] . "'");
}
// unset large array to free up memory
unset($rows);
unset($headings);
}