source: Dev/trunk/classes/PipelineSequencer_1.php @ 151

<?php
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of Sequencer
 *
 * @author HP
 */
class PipelineSequencer {

    // properties
    private $pipeline = array();
    private $name = "empty";
    private $numStepsInArray = 0;
    private $maxNumStepsInArray = 10;
    private $selectedStep;

    public function __construct($pipeline, $name, $id) {
        $this->pipeline = $pipeline;
        $this->name = $name;
    }

    public function init() {
        ?>
        <br /><form name="sequencer" action="pipelineEditor.php" method="post"><fieldset id="sequencer">
                <div class="title">Name: <?php echo $this->name; ?> </div>

                <div class="seqContent">
                    <?php $this->DrawSteps(); ?>          
                </div>

                <div id="controls">
                    <input type="submit" name="moveSelectedLeft" value="< Move" class="surveyButton" />
                    <input type="submit" name="moveSelectedRight" value="Move >" class="surveyButton" />
                    <input type="submit" name="editSelected" value="Edit step" class="surveyButton" />
                    <input type="submit" name="deleteSelected" value="Delete step" class="surveyButton" />
                    <input type="submit" name="clearPipeline" value="Clear pipeline" class="surveyButton dis" disabled="true"/>
                    <input type="checkbox" name="confirmClear" onChange="IsCheckEnabled(this, document.sequencer.clearPipeline);" />Really clear?
                    <input type="hidden" name="selectedStep" />
                </div>
            </fieldset>
        </form>
        <?php
    }

    public function AddStep($newStep) {
        $n = 1;
        foreach ($this->pipeline as $existingStep) {
            if ($existingStep->name == $newStep . " $n") {
                $n++;
            }
        }

        $this->pipeline[] = new Step($newStep, $newStep . " " . $n, count($this->pipeline) + 1);
        //var_dump($this->pipeline);
        ?>
        <script type="text/javascript">
            document.refresh();
        </script>
        <?php
    }

    public function RemoveStep($targetStep) {

        $tempArray = array();
        $removed = false;
        foreach ($this->pipeline as $step) {
            if ($step->id != $targetStep) {
                $tempArray[] = $step;
                if ($removed) {
                    $step::AdjustID(-1);
                }
            } else {
                $removed = true;
            }
        }
        $this->pipeline = $tempArray;
    }

    public function GetPipeline() {
        return $this->pipeline;
    }

    public function DrawSteps() {
        //draw the actual icons in the container div.
        if (!empty($this->pipeline)) {
            foreach ($this->pipeline as $step) {
                if ($this->numStepsInArray < $this->maxNumStepsInArray) {
                    //var_dump($step);
                    $step->init();
                    $this->numStepsInArray++;
                    if ($this->numStepsInArray < $this->maxNumStepsInArray && $this->numStepsInArray < count($this->pipeline)) {
                        echo "<div class='divider'></div>";
                    }
                }
            }
        }
    }

    public function MoveStep($direction) {
        $key = array_search($this->selectedStep, $this->pipeline);
        //echo $key;
    }

    private function MoveEntry(&$array, $key, $dir) {
        if ($dir == -1) {   // move up
            if ($key > 0) {
                $reverseArray = array_reverse(array_slice($array, $key - 1, 2, true));   // make a reversed array of the two entries, preserving keys
                array_splice($array, $key - 1, 2, $reverseArray);    // replace the given range in the oldArray with the reversed Array
            }
        } else if ($dir == 1) {   // move down
            if ($key < count($array) - 1) {
                $reverseArray = array_reverse(array_slice($array, $key, 2, true));   // make a reversed array of the two entries, preserving keys
                array_splice($array, $key, 2, $reverseArray);    // replace the given range in the oldArray with the reversed Array
            }
        }
    }

    public function SetSelected($key) {

        if ($key > 0 && $key < count($this->pipeline)) {
            $this->selectedStep = $key;
        }
    }

    public function GetName($name) {
        if ($name && $name != "") {
            $this->name = $name;
        }
    }

    public function GetFromDB() {

        $dbi = new DatabaseInterface();
        $this->pipeline = $dbi->get("pipeline", array("uid"=>$uid));
        //this doesn't actually work, the sequencer doesn't know what the uid is yet. This data should be POSTed upon refresh!
        
        
        
        if (isset($_POST['destroy'])) {
            unset($_POST['destroy']);
            unset($_SESSION['currentPipeline']);
        }

        if (isset($_POST['clearPipeline'])) {
            $this->pipeline = array();
            $_SESSION['currentPipeline'] = $this->pipeline;
        }

        if (isset($_SESSION['currentPipeline']) && !empty($_SESSION['currentPipeline'])) {      // take pipeline from session data
            $this->pipeline = $_SESSION['currentPipeline'];
        } else {
            $pipeline = array();
        }

        if (isset($_POST['objectToCreate'])) {      // user clicked a button in the toolbox.
            //$this->pipeline[] = new Step($_POST['objectToCreate'], $_POST['objectToCreate'] . " NEW", null);
            $this::AddStep($_POST['objectToCreate']);
        }

        if (isset($_POST['deleteSelected'])) {
            if (isset($_POST['selectedStep'])) {
                $this->RemoveStep($_POST['selectedStep']);
            }
        }

        //var_dump($_POST);

        if (isset($_POST['selectedStep'])) {
            $this::SetSelected($_POST['selectedStep']);
        }

        $_SESSION['currentPipeline'] = $this->pipeline;
    }

    private function Javascript() {
        ?>
        <!-- 
        Add JS code for selecting steps, highlighting them, reordering, etc.
        Is a refresh of the page (with subsequent querying of database really necessary?
        
        -->
        <script type="text/javascript">
            function selectStep(step) {
                step.addClass("selected");
                document.sequencer.controls.selectedStep.value = step.name;
            }
        </script>


        <?php
    }

}
?>