<?php
require_once (dirname(__FILE__) . "/../sql.inc");
require_once (dirname(__FILE__) . "/../lists.inc");
require_once("ORDataObject.class.php");
require_once("Patient.class.php");
require_once("Person.class.php");
require_once("Provider.class.php");
require_once("Pharmacy.class.php");
require_once("NumberToText.class.php");
//below is required for the set_medication() function
require_once (dirname(__FILE__) . "/../formdata.inc.php");

// Below list of terms are deprecated, but we keep this list
//   to keep track of the official openemr drugs terms and
//   corresponding ID's for reference. Official is referring
//   to the default settings after installing OpenEMR.
//
// define('UNIT_BLANK',0);
// define('UNIT_MG',1);
// define('UNIT_MG_1CC',2);
// define('UNIT_MG_2CC',3);
// define('UNIT_MG_3CC',4);
// define('UNIT_MG_4CC',5);
// define('UNIT_MG_5CC',6);
// define('UNIT_MCG',7);
// define('UNIT_GRAMS',8);
//
// define('INTERVAL_BLANK',0);
// define('INTERVAL_BID',1);
// define('INTERVAL_TID',2);
// define('INTERVAL_QID',3);
// define('INTERVAL_Q_3H',4);
// define('INTERVAL_Q_4H',5);
// define('INTERVAL_Q_5H',6);
// define('INTERVAL_Q_6H',7);
// define('INTERVAL_Q_8H',8);
// define('INTERVAL_QD',9);
// define('INTERVAL_AC',10); // added May 2008
// define('INTERVAL_PC',11); // added May 2008
// define('INTERVAL_AM',12); // added May 2008
// define('INTERVAL_PM',13); // added May 2008
// define('INTERVAL_ANTE',14); // added May 2008
// define('INTERVAL_H',15); // added May 2008
// define('INTERVAL_HS',16); // added May 2008
// define('INTERVAL_PRN',17); // added May 2008
// define('INTERVAL_STAT',18); // added May 2008
//
// define('FORM_BLANK',0);
// define('FORM_SUSPENSION',1);
// define('FORM_TABLET',2);
// define('FORM_CAPSULE',3);
// define('FORM_SOLUTION',4);
// define('FORM_TSP',5);
// define('FORM_ML',6);
// define('FORM_UNITS',7);
// define('FORM_INHILATIONS',8);
// define('FORM_GTTS_DROPS',9);
// define('FORM_CR',10);
// define('FORM_OINT',11);
//
// define('ROUTE_BLANK',0);
// define("ROUTE_PER_ORIS", 1);
// define("ROUTE_PER_RECTUM", 2);
// define("ROUTE_TO_SKIN", 3);
// define("ROUTE_TO_AFFECTED_AREA", 4);
// define("ROUTE_SUBLINGUAL", 5);
// define("ROUTE_OS", 6);
// define("ROUTE_OD", 7);
// define("ROUTE_OU", 8);
// define("ROUTE_SQ", 9);
// define("ROUTE_IM", 10);
// define("ROUTE_IV", 11);
// define("ROUTE_PER_NOSTRIL", 12);
// define("ROUTE_B_EAR", 13);
// define("ROUTE_L_EAR", 14);
// define("ROUTE_R_EAR", 15);
//
// define('SUBSTITUTE_YES',1);
// define('SUBSTITUTE_NO',2);
//

// Added 7-2009 by BM to incorporate the units, forms, interval, route lists from list_options
//  This mechanism may only be temporary; will likely migrate changes more downstream to allow
//   users the options of using the addlist widgets and validation frunctions from options.inc.php
//   in the forms and output.
function load_drug_attributes($id) {
    $res = sqlStatement("SELECT * FROM list_options WHERE list_id = '$id' ORDER BY seq");
    while ($row = sqlFetchArray($res)) {
	if ($row['title'] == '') {
	 $arr[$row['option_id']] = ' ';
	}
	else {
         $arr[$row['option_id']] = xl_list_label($row['title']);
	}
    }
    return $arr;
}

/**
 * class Prescription
 *
 */
class Prescription extends ORDataObject {
    
    /**
     *
     * @access public
     */
    
    /**
     *
     * static
     */
    var $form_array;
    var $unit_array;
    var $route_array;
    var $interval_array;
    var $substitute_array;
    var $medication_array;
    var $refills_array;
    
    /**
     *
     * @access private
     */
    
    var $id;
    var $patient;
    var $pharmacist;
    var $date_added;
    var $date_modified;
    var $pharmacy;
    var $start_date;
    var $filled_date;
    var $provider;
    var $note;
    var $drug;
    var $form;
    var $dosage;
    var $quantity;
    var $size;
    var $unit;
    var $route;
    var $interval;
    var $substitute;
    var $refills;
    var $per_refill;
    var $medication;

    var $drug_id;
    var $active;

    /**
    * Constructor sets all Prescription attributes to their default value
    */
    
    function Prescription($id= "", $_prefix = "") {
    
	// Modified 7-2009 by BM to load the arrays from the lists in lists_options.
	// Plan for this to only be temporary, hopefully have the lists used directly
	//  from forms in future to allow use of widgets etc.
        $this->route_array = load_drug_attributes('drug_route');        
        $this->form_array = load_drug_attributes('drug_form');
        $this->interval_array = load_drug_attributes('drug_interval');
	$this->unit_array = load_drug_attributes('drug_units');

        $this->substitute_array = array("",xl("substitution allowed"),
            xl ("do not substitute"));
    
        $this->medication_array = array(0 => xl('No'), 1 => xl('Yes'));
    
        if (is_numeric($id)) { $this->id = $id; }
        else { $id = "";}

        //$this->unit = UNIT_MG;
        //$this->route = ROUTE_PER_ORIS;
        //$this->quantity = 1;
        //$this->size = 1;
        $this->refills = 0;
        //$this->form = FORM_TABLET;
        $this->substitute = false;
        $this->_prefix = $_prefix;
        $this->_table = "prescriptions";
        $this->pharmacy = new Pharmacy();
        $this->pharmacist = new Person();
        $this->provider = new Provider($_SESSION['authId']);
        $this->patient = new Patient();
        $this->start_date = date("Y-m-d");
        $this->date_added = date("Y-m-d");
        $this->date_modified = date("Y-m-d");
        $this->per_refill = 0;
        $this->note = "";
        
        $this->drug_id = 0;
        $this->active = 1;
        
        for($i=0;$i<21;$i++) {
            $this->refills_array[$i] = sprintf("%02d",$i);
        }

        if ($id != "") { $this->populate(); }
    }
    
    function persist() {
        $this->date_modified = date("Y-m-d");
        if ($this->id == "") { $this->date_added = date("Y-m-d"); }
        if (parent::persist()) { }
    }

    function populate() {
        parent::populate();
    }

    function toString($html = false) {
        $string .= "\n"
        	."ID: " . $this->id . "\n"
        	."Patient:" . $this->patient . "\n"
        	."Patient ID:" . $this->patient->id . "\n"
        	."Pharmacist: " . $this->pharmacist . "\n"
        	."Pharmacist ID: " . $this->pharmacist->id . "\n"
        	."Date Added: " . $this->date_added. "\n"
        	."Date Modified: " . $this->date_modified. "\n"
        	."Pharmacy: " . $this->pharmacy. "\n"
        	."Pharmacy ID:" . $this->pharmacy->id . "\n"
        	."Start Date: " . $this->start_date. "\n"
        	."Filled Date: " . $this->filled_date. "\n"
        	."Provider: " . $this->provider. "\n"
        	."Provider ID: " . $this->provider->id. "\n"
        	."Note: " . $this->note. "\n"
        	."Drug: " . $this->drug. "\n"
        	."Form: " . $this->form_array[$this->form]. "\n"
        	."Dosage: " . $this->dosage. "\n"
        	."Qty: " . $this->quantity. "\n"
        	."Size: " . $this->size. "\n"
        	."Unit: " . $this->unit_array[$this->unit] . "\n"
        	."Route: " . $this->route_array[$this->route] . "\n"
        	."Interval: " .$this->interval_array[$this->interval]. "\n"
        	."Substitute: " . $this->substitute_array[$this->substitute]. "\n"
        	."Refills: " . $this->refills. "\n"
        	."Per Refill: " . $this->per_refill . "\n"
        	."Drug ID: " . $this->drug_id . "\n"
        	."Active: " . $this->active;

        if ($html) { return nl2br($string); }
        else { return $string; }
    }
    function get_encounter(){
	return $_SESSION['encounter'];
    }

    function get_unit_display( $display_form="" ) {
    	return( $this->unit_array[$this->unit] );
    }

    function get_unit() {
        return $this->unit;
    }
    function set_unit($unit) {
        if (is_numeric($unit)) { $this->unit = $unit; }
    }

    function set_id($id) {
        if (!empty($id) && is_numeric($id)) { $this->id = $id; }
    }
    function get_id() {
        return $this->id;
    }

    function get_dosage_display( $display_form="" ) {
        if( empty($this->form) && empty($this->interval) ) {
            return( $this->dosage );
        }
        else {
            return ($this->dosage . " " . xl('in') . " " . $this->form_array[$this->form] . " " . $this->interval_array[$this->interval]);
        } 
    }

    function set_dosage($dosage) {
    	$this->dosage = $dosage;
    }
    function get_dosage() {
        return $this->dosage;
    }

    function set_form($form) {
        if (is_numeric($form)) { $this->form = $form; }
    }
    function get_form() {
        return $this->form;
    }
    
    function set_refills($refills) {
        if (is_numeric($refills)) { $this->refills = $refills; }
    }
    function get_refills() {
        return $this->refills;
    }

    function set_size($size) {
        if (is_numeric($size)) { $this->size = $size; }
    }
    function get_size() {
        return $this->size;
    }

    function set_quantity($qty) {
    // if (is_numeric($qty)) {
        $this->quantity = $qty;
    // }
    }
    function get_quantity() {
        return $this->quantity;
    }
    
    function set_route($route) {
        if (is_numeric($route)) { $this->route = $route; }
    }
    function get_route() {
        return $this->route;
    }
    
    function set_interval($interval) {
        if (is_numeric($interval)) { $this->interval = $interval; }
    }
    function get_interval() {
        return $this->interval;
    }

    function set_substitute($sub) {
        if (is_numeric($sub)) { $this->substitute = $sub; }
    }
    function get_substitute() {
        return $this->substitute;
    }
    function set_erx_source($erx_source) {
        $this->erx_source = $erx_source;
    }
    function set_medication($med) {
        global $ISSUE_TYPES;

        $this->medication = $med;

        // Avoid making a mess if we are not using the "medication" issue type.
        if (isset($ISSUE_TYPES) && !$ISSUE_TYPES['medication']) return;
	
        //below statements are bypassing the persist() function and being used directly in database statements, hence need to use the functions in library/formdata.inc.php
	// they have already been run through populate() hence stripped of escapes, so now need to be escaped for database (add_escape_custom() function).
	
        //check if this drug is on the medication list
        $dataRow = sqlQuery("select id from lists where type = 'medication' and activity = 1 and (enddate is null or cast(now() as date) < enddate) and upper(trim(title)) = upper(trim('" . add_escape_custom($this->drug) . "')) and pid = " . add_escape_custom($this->patient->id) . ' limit 1');

        if ($med && !isset($dataRow['id'])){
            $dataRow = sqlQuery("select id from lists where type = 'medication' and activity = 0 and (enddate is null or cast(now() as date) < enddate) and upper(trim(title)) = upper(trim('" . add_escape_custom($this->drug) . "')) and pid = " . add_escape_custom($this->patient->id) . ' limit 1');

            if (!isset($dataRow['id'])){
                //add the record to the medication list
                sqlInsert("insert into lists(date,begdate,type,activity,pid,user,groupname,title) values (now(),cast(now() as date),'medication',1," . add_escape_custom($this->patient->id) . ",'" . $$_SESSION['authUser']. "','" . $$_SESSION['authProvider'] . "','" . add_escape_custom($this->drug) . "')");
            }
            else {
                $dataRow = sqlQuery('update lists set activity = 1'
                            . " ,user = '" . $$_SESSION['authUser']
                            . "', groupname = '" . $$_SESSION['authProvider'] . "' where id = " . $dataRow['id']);
            }
        }
        elseif (!$med && isset($dataRow['id'])) {
            //remove the drug from the medication list if it exists
            $dataRow = sqlQuery('update lists set activity = 0'
                            . " ,user = '" . $$_SESSION['authUser']
                            . "', groupname = '" . $$_SESSION['authProvider'] . "' where id = " . $dataRow['id']);
        }
    }

    function get_medication() {
        return $this->medication;
    }
    
    function set_per_refill($pr) {
        if (is_numeric($pr)) { $this->per_refill = $pr; }
    }
    function get_per_refill() {
        return $this->per_refill;
    }

    function set_patient_id($id) {
        if (is_numeric($id)) { $this->patient = new Patient($id); }
    }
    function get_patient_id() {
        return $this->patient->id;
    }

    function set_provider_id($id) {
        if (is_numeric($id)) { $this->provider = new Provider($id); }
    }
    function get_provider_id() {
        return $this->provider->id;
    }

    function set_provider($pobj) {
        if (get_class($pobj) == "provider") { $this->provider = $pobj; }
    }
    
    function set_pharmacy_id($id) {
        if (is_numeric($id)) { $this->pharmacy = new Pharmacy($id); }
    }
    function get_pharmacy_id() {
        return $this->pharmacy->id;
    }

    function set_pharmacist_id($id) {
        if (is_numeric($id)) { $this->pharmacist = new Person($id); }
    }
    function get_pharmacist() {
        return $this->pharmacist->id;
    }

    function get_start_date_y() {
        $ymd = split("-",$this->start_date);
        return $ymd[0];
    }
    function set_start_date_y($year) {
        if (is_numeric($year)) {
            $ymd = split("-",$this->start_date);
            $ymd[0] = $year;
            $this->start_date = $ymd[0] ."-" . $ymd[1] ."-" . $ymd[2];
        }
    }
    function get_start_date_m() {
        $ymd = split("-",$this->start_date);
        return $ymd[1];
    }
    function set_start_date_m($month) {
        if (is_numeric($month)) {
            $ymd = split("-",$this->start_date);
            $ymd[1] = $month;
            $this->start_date = $ymd[0] ."-" . $ymd[1] ."-" . $ymd[2];
        }
    }
    function get_start_date_d() {
        $ymd = split("-",$this->start_date);
        return $ymd[2];
    }
    function set_start_date_d($day) {
        if (is_numeric($day)) {
            $ymd = split("-",$this->start_date);
            $ymd[2] = $day;
            $this->start_date = $ymd[0] ."-" . $ymd[1] ."-" . $ymd[2];
        }
    }
    function get_start_date() {
        return $this->start_date;
    }
    function set_start_date($date) {
        return $this->start_date = $date;
    }
    
    // TajEmo work by CB 2012/05/30 01:56:32 PM added encounter for auto ticking of checkboxes
    function set_encounter($enc) {
        return $this->encounter = $enc;
    }

    function get_date_added() {
        return $this->date_added;
    }
    function set_date_added($date) {
        return $this->date_added = $date;
    }

    function get_date_modified() {
        return $this->date_modified;
    }
    function set_date_modified($date) {
        return $this->date_modified = $date;
    }

    function get_filled_date() {
        return $this->filled_date;
    }
    function set_filled_date($date) {
        return $this->filled_date = $date;
    }

    function set_note($note) {
        $this->note = $note;
    }
    function get_note() {
        return $this->note;
    }

    function set_drug($drug) {
        $this->drug = $drug;
    }
    function get_drug() {
        return $this->drug;
    }

    function get_filled_by_id() {
        return $this->pharmacist->id;
    }
    function set_filled_by_id($id) {
        if (is_numeric($id)) { return $this->pharmacist->id = $id; }
    }

    function set_drug_id($drug_id) {
        $this->drug_id = $drug_id;
    }
    function get_drug_id() {
        return $this->drug_id;
    }

    function set_active($active) {
        $this->active = $active;
    }
    function get_active() {
        return $this->active;
    }
    
    function get_prescription_display() {
        $pconfig = $GLOBALS['oer_config']['prescriptions'];
        
        switch ($pconfig['format']) {
            case "FL":
                return $this->get_prescription_florida_display();
                break;
            default:
                break;
        }

        $sql = "SELECT * FROM users JOIN facility AS f ON f.name = users.facility where users.id ='" . mysql_real_escape_string($this->provider->id) . "'";
        $db = get_db();
        $results = $db->Execute($sql);
        if (!$results->EOF) {
            $string = $results->fields['name'] . "\n"
                    . $results->fields['street'] . "\n"
                    . $results->fields['city'] . ", " . $results->fields['state'] . " " . $results->fields['postal_code'] . "\n"
                    . $results->fields['phone'] . "\n\n";
        }
        
        $string .= ""
                ."Prescription For:" . "\t" .$this->patient->get_name_display() . "\n"
                ."DOB:"."\t".$this->patient->get_dob()."\n"
                ."Start Date: " . "\t\t" . $this->start_date. "\n"
                ."Provider: " . "\t\t" . $this->provider->get_name_display(). "\n"
                ."Provider DEA No.: " . "\t\t" . $this->provider->federal_drug_id. "\n"
                ."Drug: " . "\t\t\t" . $this->drug. "\n"
                ."Dosage: " . "\t\t" . $this->dosage . " in ". $this->form_array[$this->form]. " form " . $this->interval_array[$this->interval]. "\n"
                ."Qty: " . "\t\t\t" . $this->quantity. "\n"
                ."Medication Unit: " . "\t" . $this->size  . " ". $this->unit_array[$this->unit] . "\n"
                ."Substitute: " . "\t\t" . $this->substitute_array[$this->substitute]. "\n";
        if ($this->refills > 0) {
            $string .= "Refills: " . "\t\t" . $this->refills. ", of quantity: " . $this->per_refill ."\n";
        }
        $string .= "\n"."Notes: \n" . $this->note . "\n";
        return $string;
    }
    
    function get_prescription_florida_display() {
    
        $db = get_db();
        $ntt = new NumberToText($this->quantity);
        $ntt2 = new NumberToText($this->per_refill);
        $ntt3 = new NumberToText($this->refills);
        
        $string = "";
        
        $gnd = $this->provider->get_name_display();
        
        while(strlen($gnd)<31) { $gnd .= " "; }
        
        $string .= $gnd . $this->provider->federal_drug_id . "\n"; 
        
        $sql = "SELECT * FROM users JOIN facility AS f ON f.name = users.facility where users.id ='" . mysql_real_escape_string($this->provider->id) . "'";
        $results = $db->Execute($sql);
        
        if (!$results->EOF) {
            $rfn = $results->fields['name'];
        
            while(strlen($rfn)<31) { $rfn .= " "; }
        
            $string .= $rfn . $this->provider->get_provider_number_default() . "\n"
                    . $results->fields['street'] . "\n"
                    . $results->fields['city'] . ", " . $results->fields['state'] . " " . $results->fields['postal_code'] . "\n"
                    . $results->fields['phone'] . "\n";
        }
        
        $string .= "\n";
        $string .= strtoupper($this->patient->lname) . ", " . ucfirst($this->patient->fname) . " " . $this->patient->mname . "\n";
        $string .= "DOB " .  $this->patient->date_of_birth . "\n";
        $string .= "\n";
        $string .= date("F j, Y", strtotime($this->start_date)) . "\n";
        $string .= "\n";
        $string .= strtoupper($this->drug) . " " . $this->size  . " ". $this->unit_array[$this->unit] . "\n";
        if (strlen($this->note) > 0) {
            $string .= "Notes: \n" . $this->note . "\n";	
        }
        if (!empty($this->dosage)) {
            $string .= $this->dosage;
            if (!empty($this->form)){ 
                $string .= " " . $this->form_array[$this->form];
            } 
            if (!empty($this->interval)) {
                $string .= " " . $this->interval_array[$this->interval];
            }
            if (!empty($this->route)) {
                $string .= " " . $this->route_array[$this->route] . "\n";
            }
        }
        if (!empty($this->quantity)) {
            $string .= "Disp: " . $this->quantity . " (" . trim(strtoupper($ntt->convert())) . ")" . "\n";
        }
        $string .= "\n";
        $string .= "Refills: " . $this->refills . " (" . trim(strtoupper($ntt3->convert())) ."), Per Refill Disp: " . $this->per_refill . " (" . trim(strtoupper($ntt2->convert())) . ")" ."\n";
        $string .= $this->substitute_array[$this->substitute]. "\n";
        $string .= "\n";
        
        return $string;
    }
    
    function prescriptions_factory($patient_id,
                            $order_by = "active DESC, date_modified DESC, date_added DESC")
    {
        $prescriptions = array();
        require_once (dirname(__FILE__) . "/../translation.inc.php");
        $p = new Prescription();
        $sql = "SELECT id FROM  " . $p->_table . " WHERE patient_id = " .
                mysql_real_escape_string($patient_id) .
                " ORDER BY " . mysql_real_escape_string($order_by);
        $results = sqlQ($sql);
        while ($row = mysql_fetch_array($results) ) {
            $prescriptions[] = new Prescription($row['id']);
        }
        return $prescriptions;
    }
    
    function get_dispensation_count() {
        if (empty($this->id)) return 0;
        $refills_row = sqlQuery("SELECT count(*) AS count FROM drug_sales " .
                    "WHERE prescription_id = '" . $this->id . "' AND quantity > 0");
        return $refills_row['count'];
    }

}// end of Prescription
?>