<?php
 
/*  - large contract value
  - standard dev from mean/median
  - percent of total contracts for supplier/agency */
$heuristics["VALUE_LARGE_CONTRACT_OVERALL"] = Array(
    "description" => "unusual value for time of year");
 
function VALUE_LARGE_CONTRACT_OVERALL($cn) {
    $averageContractPeriod = getAverageContractPeriod();
    $diff = strtotime($cn['contractStart']) - strtotime($cn['publishDate']);
    $days = intval($diff / 24);
    return ($days > 45 ? 1 : 0);
}
 
/*  - peculiar value
  - Just under 80k, amplified if other contracts with same supplier are just under
 */
$heuristics["VALUE_NEAR_THRESHOLD"] = Array(
    "description" => "unusual value for time of year");
/*
  - unusual variation amount - absolute value; large reductions as well as large increases
 */
$heuristics["VALUE_LARGE_VARIATION"] = Array(
    "description" => "unusual value for time of year");
 
function VALUE_LARGE_VARIATION($cn) {
    $averageContractPeriod = getAverageContractPeriod();
    $diff = strtotime($cn['contractStart']) - strtotime($cn['publishDate']);
    $days = intval($diff / 24);
    return ($days > 45 ? 1 : 0);
}
 
/*   - unusual value for time of year
  - compare to all other records in last 2 weeks
  - ie. many large contracts in june so takes more to standout */
$heuristics["VALUE_HIGH_FOR_MONTH"] = Array(
    "description" => "unusual value for time of year"
);
 
function VALUE_HIGH_FOR_MONTH($cn, $monthAsInt) {
    $averageContractPeriod = getAverageContractPeriod();
    $diff = strtotime($cn['contractStart']) - strtotime($cn['publishDate']);
    $days = intval($diff / 24);
    return ($days > 45 ? 1 : 0);
}
 
$monthlyValueAverage = Array();
 
function getAgencyTransactions($agencyName) {
    global $agencyTransactions;
    if (!$agencyTransactions[$agencyName]) {
        $query = 'select count(*) from contractnotice where agencyName = "' . $agencyName . '"';
        $result = $conn->query($query);
        $r = $result->fetch(PDO::FETCH_BOTH);
        $agencyTransactions[$agencyName] = $r[0];
    }
    return $agencyTransactions[$agencyName];
}
 
?>