format.php

很棒的在线教学系统

                        // Doesn't apply since the user responds with text input
                        break;
                    case 'Multiple Choice':
                        $mc_choices = $pblock['#']['response_lid'][0]['#']['render_choice'][0]['#']['flow_label'];
                            foreach($mc_choices as $mc_choice) {
                            $choices = NULL;
                            $choices = $this->process_block($mc_choice, $choices);
                            $block->choices[] = $choices;             
                        }
                        break;
                    case 'Short Response':
                        // do nothing?
                        break;
                    case 'Fill in the Blank':
                        // do nothing?
                        break;
                    case 'Fill in the Blank Plus':
                        // do nothing?
                        break;                  
                    case 'Numeric':
                        // do nothing?
                        break;                             
                    default:
                        $bb_choices = $pblock['#']['response_lid'][0]['#']['render_choice'][0]['#']['flow_label'][0]['#']['response_label'];
                        $choices = array();
                        $this->process_choices($bb_choices, $choices);
                        $block->choices = $choices;
                }
                break;
            case 'RIGHT_MATCH_BLOCK':
                $matching_answerset = $pblock['#']['flow'];

                $answerset = array();
                foreach($matching_answerset as $answer) {
                    // $answerset[] = $this->process_block($answer, $bb_answer);
                    $bb_answer = null;
                    $bb_answer->text = $answer['#']['flow'][0]['#']['material'][0]['#']['mat_extension'][0]['#']['mat_formattedtext'][0]['#'];
                    $answerset[] = $bb_answer;
                }
                $block->matching_answerset = $answerset;
                break;
            default:
                print "UNHANDLED PRESENTATION BLOCK";
                break;
        }
        $question->{$block->type} = $block;
    }
    
    // determine response processing 
    // there is a section called 'outcomes' that I don't know what to do with
    $resprocessing = $quest['#']['resprocessing'];
    $respconditions = $resprocessing[0]['#']['respcondition'];
    $responses = array();
    if ($question->qtype == 'Matching') {
        $this->process_matching_responses($respconditions, $responses);
    }
    else {
        $this->process_responses($respconditions, $responses);
    }
    $question->responses = $responses;
    $feedbackset = $quest['#']['itemfeedback'];
    $feedbacks = array();
    $this->process_feedback($feedbackset, $feedbacks);
    $question->feedback = $feedbacks;
    return $question;
}

function process_block($cur_block, &$block) {
    global $COURSE, $CFG;

    $cur_type = $cur_block['@']['class'];
    switch($cur_type) {
        case 'FORMATTED_TEXT_BLOCK':
            $block->text = $this->strip_applet_tags_get_mathml($cur_block['#']['material'][0]['#']['mat_extension'][0]['#']['mat_formattedtext'][0]['#']); 
            break;
        case 'FILE_BLOCK':
            //revisit this to make sure it is working correctly
            // Commented out ['matapplication']..., etc. because I 
            // noticed that when I imported a new Blackboard 6 file
            // and printed out the block, the tree did not extend past ['material'][0]['#'] - CT 8/3/06
            $block->file = $cur_block['#']['material'][0]['#'];//['matapplication'][0]['@']['uri'];
            if ($block->file != '') {
                // if we have a file copy it to the course dir and adjust its name to be visible over the web.
                $block->file = $this->copy_file_to_course($block->file);
                $block->file = $CFG->wwwroot.'/file.php/'.$COURSE->id.'/bb_import/'.basename($block->file);
            }
            break;
        case 'Block':
            if (isset($cur_block['#']['material'][0]['#']['mattext'][0]['#'])) {
            $block->text = $cur_block['#']['material'][0]['#']['mattext'][0]['#'];
            }
            else if (isset($cur_block['#']['material'][0]['#']['mat_extension'][0]['#']['mat_formattedtext'][0]['#'])) {
                $block->text = $cur_block['#']['material'][0]['#']['mat_extension'][0]['#']['mat_formattedtext'][0]['#'];
            }
            else if (isset($cur_block['#']['response_label'])) {
                // this is a response label block
                $sub_blocks = $cur_block['#']['response_label'][0];
                if(!isset($block->ident)) {
                    if(isset($sub_blocks['@']['ident'])) {
                        $block->ident = $sub_blocks['@']['ident'];
                    }
                }
                foreach($sub_blocks['#']['flow_mat'] as $sub_block) {
                    $this->process_block($sub_block, $block);   
                }
            }
            else {
                if (isset($cur_block['#']['flow_mat']) || isset($cur_block['#']['flow'])) {
                    if (isset($cur_block['#']['flow_mat'])) {
                        $sub_blocks = $cur_block['#']['flow_mat'];
                    }
                    elseif (isset($cur_block['#']['flow'])) {
                        $sub_blocks = $cur_block['#']['flow'];
                    }
                   foreach ($sub_blocks as $sblock) {
                        // this will recursively grab the sub blocks which should be of one of the other types
                        $this->process_block($sblock, $block);
                    }
                }
            }
            break;
        case 'LINK_BLOCK':
            // not sure how this should be included
            if (!empty($cur_block['#']['material'][0]['#']['mattext'][0]['@']['uri'])) {
                $block->link = $cur_block['#']['material'][0]['#']['mattext'][0]['@']['uri'];
            }
            else {
               $block->link = '';
            }
            break;    
    }    
    return $block;
}

function process_choices($bb_choices, &$choices) {
    foreach($bb_choices as $choice) {
            if (isset($choice['@']['ident'])) {
            $cur_choice = $choice['@']['ident'];
        }
        else { //for multiple answer
            $cur_choice = $choice['#']['response_label'][0];//['@']['ident'];
        }
        if (isset($choice['#']['flow_mat'][0])) { //for multiple answer
            $cur_block = $choice['#']['flow_mat'][0];
            // Reset $cur_choice to NULL because process_block is expecting an object
            // for the second argument and not a string, which is what is was set as
            // originally - CT 8/7/06
            $cur_choice = null; 
            $this->process_block($cur_block, $cur_choice);
        }
        elseif (isset($choice['#']['response_label'])) {
            // Reset $cur_choice to NULL because process_block is expecting an object
            // for the second argument and not a string, which is what is was set as
            // originally - CT 8/7/06
            $cur_choice = null; 
            $this->process_block($choice, $cur_choice);
        }
        $choices[] = $cur_choice;
    }    
}

function process_matching_responses($bb_responses, &$responses) {
    foreach($bb_responses as $bb_response) {
        $response = NULL;
        if (isset($bb_response['#']['conditionvar'][0]['#']['varequal'])) {
            $response->correct = $bb_response['#']['conditionvar'][0]['#']['varequal'][0]['#'];
            $response->ident = $bb_response['#']['conditionvar'][0]['#']['varequal'][0]['@']['respident'];
        }
        else {
            $response->correct =  'Broken Question?';
            $response->ident = 'Broken Question?';
        }
        $response->feedback = $bb_response['#']['displayfeedback'][0]['@']['linkrefid'];
        $responses[] = $response;
    }
}

function process_responses($bb_responses, &$responses) {
    foreach($bb_responses as $bb_response) {
        //Added this line to instantiate $response.
        // Without instantiating the $response variable, the same object
        // gets added to the array
        $response = null;
        if (isset($bb_response['@']['title'])) {
                $response->title = $bb_response['@']['title'];    
            }
            else {
                $reponse->title = $bb_response['#']['displayfeedback'][0]['@']['linkrefid'];
            }
            $reponse->ident = array();
            if (isset($bb_response['#']['conditionvar'][0]['#'])){//['varequal'][0]['#'])) {
                $response->ident[0] = $bb_response['#']['conditionvar'][0]['#'];//['varequal'][0]['#'];    
            }
            else if (isset($bb_response['#']['conditionvar'][0]['#']['other'][0]['#'])) {
                $response->ident[0] = $bb_response['#']['conditionvar'][0]['#']['other'][0]['#'];  
            }
            
            if (isset($bb_response['#']['conditionvar'][0]['#']['and'])){//[0]['#'])) {
                $responseset = $bb_response['#']['conditionvar'][0]['#']['and'];//[0]['#']['varequal'];
                foreach($responseset as $rs) {
                    $response->ident[] = $rs['#'];
                    if(!isset($response->feedback) and isset( $rs['@'] ) ) {
                        $response->feedback = $rs['@']['respident'];
                    }    
                }
            }
            else {
                $response->feedback = $bb_response['#']['displayfeedback'][0]['@']['linkrefid'];   
            }

            // determine what point value to give response
            if (isset($bb_response['#']['setvar'])) {
                switch ($bb_response['#']['setvar'][0]['#']) {
                    case "SCORE.max":
                        $response->fraction = 1;
                        break;
                    default:
                        // I have only seen this being 0 or unset  
                        // there are probably fractional values of SCORE.max, but I'm not sure what they look like
                        $response->fraction = 0;
                        break;
                }
            }
            else {
               // just going to assume this is the case this is probably not correct.
               $response->fraction = 0;
            }
            
            $responses[] = $response;
        }
}

function process_feedback($feedbackset, &$feedbacks) {
    foreach($feedbackset as $bb_feedback) {
        // Added line $feedback=null so that $feedback does not get reused in the loop
        // and added the the $feedbacks[] array multiple times
        $feedback = null;  
        $feedback->ident = $bb_feedback['@']['ident'];
        if (isset($bb_feedback['#']['flow_mat'][0])) {
            $this->process_block($bb_feedback['#']['flow_mat'][0], $feedback);
        }
        elseif (isset($bb_feedback['#']['solution'][0]['#']['solutionmaterial'][0]['#']['flow_mat'][0])) {
            $this->process_block($bb_feedback['#']['solution'][0]['#']['solutionmaterial'][0]['#']['flow_mat'][0], $feedback);
        }
        $feedbacks[] = $feedback;
    }
}

/**
 * Create common parts of question
 */
function process_common( $quest ) {
    $question = $this->defaultquestion();
    $question->questiontext = addslashes($quest->QUESTION_BLOCK->text);
    $question->name = shorten_text( $quest->id, 250 );

    return $question;
}

//----------------------------------------
// Process True / False Questions
//----------------------------------------
function process_tf($quest, &$questions) {
    $question = $this->process_common( $quest );

    $question->qtype = TRUEFALSE;
    $question->single = 1; // Only one answer is allowed
    // 0th [response] is the correct answer.
    $responses = $quest->responses;
    $correctresponse = $responses[0]->ident[0]['varequal'][0]['#'];
    if ($correctresponse != 'false') {
        $correct = true;    
    }
    else {
        $correct = false;   
    }
    
    foreach($quest->feedback as $fb) {
        $fback->{$fb->ident} = $fb->text;   
    }
    
    if ($correct) {  // true is correct
        $question->answer = 1;
        $question->feedbacktrue = addslashes($fback->correct);
        $question->feedbackfalse = addslashes($fback->incorrect);
    } else {  // false is correct
        $question->answer = 0;
        $question->feedbacktrue = addslashes($fback->incorrect);
        $question->feedbackfalse = addslashes($fback->correct);
    }
    $question->correctanswer = $question->answer;
    $questions[] = $question;
}


//----------------------------------------
// Process Fill in the Blank
//----------------------------------------
function process_fblank($quest, &$questions) {
    $question = $this->process_common( $quest );
    $question->qtype = SHORTANSWER;
    $question->single = 1;

    $answers = array();
    $fractions = array();
    $feedbacks = array();
    
    // extract the feedback
    $feedback = array();