[moodle.git] / course / mod.php

<?PHP // $Id$

//  Moves, adds, updates or deletes modules in a course

    require("../config.php");
    require("lib.php");

    if (isset($cancel)) {  
        if ($SESSION->returnpage) {
            $return = $SESSION->returnpage;
            unset($SESSION->returnpage);
            save_session("SESSION");
            redirect($return);
        } else {
            redirect("view.php?id=$mod->course");
        }
    } 


    if (isset($course) && isset($HTTP_POST_VARS)) {    // add or update form submitted

        if (isset($SESSION->modform)) {   // Variables are stored in the session
            $mod = $SESSION->modform;
            unset($SESSION->modform);
            save_session("SESSION");
        } else {
            $mod = (object)$HTTP_POST_VARS;
        }

        require_login($mod->course);

        if (!isteacher($mod->course)) {
            error("You can't modify this course!");
        }

        $modlib = "../mod/$mod->modulename/lib.php";
        if (file_exists($modlib)) {
            include($modlib);
        } else {
            error("This module is missing important code! ($modlib)");
        }
        $addinstancefunction    = $mod->modulename."_add_instance";
        $updateinstancefunction = $mod->modulename."_update_instance";
        $deleteinstancefunction = $mod->modulename."_delete_instance";

        switch ($mod->mode) {
            case "update":
                if (! $updateinstancefunction($mod)) {
                    error("Could not update the $mod->modulename");
                }
                add_to_log($mod->course, "course", "update mod", "../mod/$mod->modulename/view.php?id=$mod->coursemodule", "$mod->modulename $mod->instance"); 
                break;

            case "add":
                if (! $mod->instance = $addinstancefunction($mod)) {
                    error("Could not add a new instance of $mod->modulename");
                }
                // course_modules and course_sections each contain a reference 
                // to each other, so we have to update one of them twice.

                if (! $mod->coursemodule = add_course_module($mod) ) {
                    error("Could not add a new course module");
                }
                if (! $sectionid = add_mod_to_section($mod) ) {
                    error("Could not add the new course module to that section");
                }
                if (! set_field("course_modules", "section", $sectionid, "id", $mod->coursemodule)) {
                    error("Could not update the course module with the correct section");
                }   
                add_to_log($mod->course, "course", "add mod", "../mod/$mod->modulename/view.php?id=$mod->coursemodule", "$mod->modulename $mod->instance"); 
                break;
            case "delete":
                if (! $deleteinstancefunction($mod->instance)) {
                    notify("Could not delete the $mod->modulename (instance)");
                }
                if (! delete_course_module($mod->coursemodule)) {
                    notify("Could not delete the $mod->modulename (coursemodule)");
                }
                if (! delete_mod_from_section($mod->coursemodule, "$mod->section")) {
                    notify("Could not delete the $mod->modulename from that section");
                }
                add_to_log($mod->course, "course", "delete mod", "view.php?id=$mod->course", "$mod->modulename $mod->instance"); 
                break;
            default:
                error("No mode defined");

        }

        if ($SESSION->returnpage) {
            $return = $SESSION->returnpage;
            unset($SESSION->returnpage);
            save_session("SESSION");
            redirect($return);
        } else {
            redirect("view.php?id=$mod->course");
        }
        exit;
    }


    if (isset($move)) {  

        require_variable($id);   

        move_module($id, $move);

        redirect($HTTP_REFERER);
        exit;

    } else if (isset($delete)) {   // value = course module

        if (! $cm = get_record("course_modules", "id", $delete)) {
            error("This course module doesn't exist");
        }

        if (! $course = get_record("course", "id", $cm->course)) {
            error("This course doesn't exist");
        }

        require_login($course->id);

        if (!isteacher($course->id)) {
            error("You can't modify this course!");
        }

        if (! $module = get_record("modules", "id", $cm->module)) {
            error("This module doesn't exist");
        }

        if (! $instance = get_record($module->name, "id", $cm->instance)) {
            // Delete this module from the course right away
            if (! delete_course_module($cm->id)) {
                notify("Could not delete the $module->name (coursemodule)");
            }
            if (! delete_mod_from_section($cm->id, $cm->section)) {
                notify("Could not delete the $module->name from that section");
            }
            error("The required instance of this module didn't exist.  Module deleted.",
                  "$CFG->wwwroot/course/view.php?id=$course->id");
        }

        $fullmodulename = strtolower(get_string("modulename", $module->name));

        $form->coursemodule = $cm->id;
        $form->section      = $cm->section;
        $form->course       = $cm->course;
        $form->instance     = $cm->instance;
        $form->modulename   = $module->name;
        $form->fullmodulename  = $fullmodulename;
        $form->instancename = $instance->name;

        include("mod_delete.html");

        exit;


    } else if (isset($update)) {   // value = course module

        if (! $cm = get_record("course_modules", "id", $update)) {
            error("This course module doesn't exist");
        }

        if (! $course = get_record("course", "id", $cm->course)) {
            error("This course doesn't exist");
        }

        if (! $module = get_record("modules", "id", $cm->module)) {
            error("This module doesn't exist");
        }

        if (! $form = get_record($module->name, "id", $cm->instance)) {
            error("The required instance of this module doesn't exist");
        }
        
        if (! $cw = get_record("course_sections", "id", $cm->section)) {
            error("This course section doesn't exist");
        }

        if (isset($return)) {  
            $SESSION->returnpage = "$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id";
            save_session("SESSION");
        }

        $form->coursemodule = $cm->id;
        $form->section      = $cm->section;     // The section ID
        $form->course       = $course->id;
        $form->module       = $module->id;
        $form->modulename   = $module->name;
        $form->instance     = $cm->instance;
        $form->mode         = "update";

        $sectionname    = get_string("name$course->format");
        $fullmodulename = strtolower(get_string("modulename", $module->name));

        if ($form->section) {
            $heading->what = $fullmodulename;
            $heading->in   = "$sectionname $cw->section";
            $pageheading = get_string("updatingain", "moodle", $heading);
        } else {
            $pageheading = get_string("updatinga", "moodle", $fullmodulename);
        }

        
    } else if (isset($add)) {

        if (!$add) {
            redirect($HTTP_REFERER);
            die;
        }

        require_variable($id);
        require_variable($section);

        if (! $course = get_record("course", "id", $id)) {
            error("This course doesn't exist");
        }

        if (! $module = get_record("modules", "name", $add)) {
            error("This module type doesn't exist");
        }

        $form->section    = $section;         // The section number itself
        $form->course     = $course->id;
        $form->module     = $module->id;
        $form->modulename = $module->name;
        $form->instance   = $cm->instance;
        $form->mode       = "add";

        $sectionname    = get_string("name$course->format");
        $fullmodulename = strtolower(get_string("modulename", $module->name));

        if ($form->section) {
            $heading->what = $fullmodulename;
            $heading->to   = "$sectionname $form->section";
            $pageheading = get_string("addinganewto", "moodle", $heading);
        } else {
            $pageheading = get_string("addinganew", "moodle", $fullmodulename);
        }

    } else {
        error("No action was specfied");
    }

    require_login($course->id);

    if (!isteacher($course->id)) {
        error("You can't modify this course!");
    }

    $streditinga = get_string("editinga", "moodle", $fullmodulename);
    $strmodulenameplural = get_string("modulenameplural", $module->name);

    if ($course->category) {
        print_header("$course->shortname: $streditinga", "$course->fullname",
                     "<A HREF=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</A> -> 
                      <A HREF=\"$CFG->wwwroot/mod/$module->name/index.php?id=$course->id\">$strmodulenameplural</A> -> 
                      $streditinga", "form.name", "", false);
    } else {
        print_header("$course->shortname: $streditinga", "$course->fullname",
                     "$streditinga", "form.name", "", false);
    }

    unset($SESSION->modform); // Clear any old ones that may be hanging around.
    save_session("SESSION");

    $modform = "../mod/$module->name/mod.html";

    if (file_exists($modform)) {

        print_heading($pageheading);
        print_simple_box_start("center", "", "$THEME->cellheading");
        include($modform);
        print_simple_box_end();

    } else {
        notice("This module cannot be added to this course yet!", "$CFG->wwwroot/course/view.php?id=$course->id");
    }

    print_footer($course);

?>
Commit	Line	Data
f9903ed0	1	<?PHP // $Id$
	2
	3	// Moves, adds, updates or deletes modules in a course
	4
	5	require("../config.php");
d9d1c35d	6	require("lib.php");
f9903ed0	7
7ce20f09	8	if (isset($cancel)) {
	9	if ($SESSION->returnpage) {
	10	$return = $SESSION->returnpage;
	11	unset($SESSION->returnpage);
	12	save_session("SESSION");
	13	redirect($return);
	14	} else {
	15	redirect("view.php?id=$mod->course");
	16	}
	17	}
	18
	19
f9903ed0	20	if (isset($course) && isset($HTTP_POST_VARS)) { // add or update form submitted
ff80e012	21
	22	if (isset($SESSION->modform)) { // Variables are stored in the session
	23	$mod = $SESSION->modform;
	24	unset($SESSION->modform);
	25	save_session("SESSION");
	26	} else {
	27	$mod = (object)$HTTP_POST_VARS;
	28	}
f9903ed0	29
	30	require_login($mod->course);
	31
0d97d1e3	32	if (!isteacher($mod->course)) {
f9903ed0	33	error("You can't modify this course!");
	34	}
	35
04eba58f	36	$modlib = "../mod/$mod->modulename/lib.php";
	37	if (file_exists($modlib)) {
	38	include($modlib);
f9903ed0	39	} else {
04eba58f	40	error("This module is missing important code! ($modlib)");
f9903ed0	41	}
04eba58f	42	$addinstancefunction = $mod->modulename."_add_instance";
	43	$updateinstancefunction = $mod->modulename."_update_instance";
	44	$deleteinstancefunction = $mod->modulename."_delete_instance";
f9903ed0	45
	46	switch ($mod->mode) {
	47	case "update":
04eba58f	48	if (! $updateinstancefunction($mod)) {
f9903ed0	49	error("Could not update the $mod->modulename");
f9903ed0	50	}
2a9da9ef	51	add_to_log($mod->course, "course", "update mod", "../mod/$mod->modulename/view.php?id=$mod->coursemodule", "$mod->modulename $mod->instance");
f9903ed0	52	break;
	53
	54	case "add":
04eba58f	55	if (! $mod->instance = $addinstancefunction($mod)) {
f9903ed0	56	error("Could not add a new instance of $mod->modulename");
f9903ed0	57	}
b5fe4c93	58	// course_modules and course_sections each contain a reference
f9903ed0	59	// to each other, so we have to update one of them twice.
f9903ed0	60
d3ca63f0	61	if (! $mod->coursemodule = add_course_module($mod) ) {
f9903ed0	62	error("Could not add a new course module");
f9903ed0	63	}
b5fe4c93	64	if (! $sectionid = add_mod_to_section($mod) ) {
b5fe4c93	65	error("Could not add the new course module to that section");
f9903ed0	66	}
b5fe4c93	67	if (! set_field("course_modules", "section", $sectionid, "id", $mod->coursemodule)) {
b5fe4c93	68	error("Could not update the course module with the correct section");
f9903ed0	69	}
2a9da9ef	70	add_to_log($mod->course, "course", "add mod", "../mod/$mod->modulename/view.php?id=$mod->coursemodule", "$mod->modulename $mod->instance");
f9903ed0	71	break;
f9903ed0	72	case "delete":
04eba58f	73	if (! $deleteinstancefunction($mod->instance)) {
f3065eeb	74	notify("Could not delete the $mod->modulename (instance)");
f9903ed0	75	}
f9903ed0	76	if (! delete_course_module($mod->coursemodule)) {
f3065eeb	77	notify("Could not delete the $mod->modulename (coursemodule)");
f9903ed0	78	}
b5fe4c93	79	if (! delete_mod_from_section($mod->coursemodule, "$mod->section")) {
b5fe4c93	80	notify("Could not delete the $mod->modulename from that section");
f9903ed0	81	}
2a9da9ef	82	add_to_log($mod->course, "course", "delete mod", "view.php?id=$mod->course", "$mod->modulename $mod->instance");
f9903ed0	83	break;
	84	default:
	85	error("No mode defined");
	86
	87	}
	88
e07635f4	89	if ($SESSION->returnpage) {
	90	$return = $SESSION->returnpage;
	91	unset($SESSION->returnpage);
8223d271	92	save_session("SESSION");
e07635f4	93	redirect($return);
	94	} else {
	95	redirect("view.php?id=$mod->course");
	96	}
f9903ed0	97	exit;
	98	}
	99
	100
	101	if (isset($move)) {
	102
	103	require_variable($id);
	104
	105	move_module($id, $move);
	106
	107	redirect($HTTP_REFERER);
	108	exit;
	109
	110	} else if (isset($delete)) { // value = course module
	111
	112	if (! $cm = get_record("course_modules", "id", $delete)) {
	113	error("This course module doesn't exist");
	114	}
	115
	116	if (! $course = get_record("course", "id", $cm->course)) {
	117	error("This course doesn't exist");
	118	}
	119
501cdbd8	120	require_login($course->id);
	121
	122	if (!isteacher($course->id)) {
	123	error("You can't modify this course!");
	124	}
	125
f9903ed0	126	if (! $module = get_record("modules", "id", $cm->module)) {
	127	error("This module doesn't exist");
	128	}
	129
b5fe4c93	130	if (! $instance = get_record($module->name, "id", $cm->instance)) {
501cdbd8	131	// Delete this module from the course right away
	132	if (! delete_course_module($cm->id)) {
	133	notify("Could not delete the $module->name (coursemodule)");
	134	}
	135	if (! delete_mod_from_section($cm->id, $cm->section)) {
	136	notify("Could not delete the $module->name from that section");
	137	}
	138	error("The required instance of this module didn't exist. Module deleted.",
	139	"$CFG->wwwroot/course/view.php?id=$course->id");
b5fe4c93	140	}
b5fe4c93	141
90845098	142	$fullmodulename = strtolower(get_string("modulename", $module->name));
f9903ed0	143
f9903ed0	144	$form->coursemodule = $cm->id;
b5fe4c93	145	$form->section = $cm->section;
f9903ed0	146	$form->course = $cm->course;
	147	$form->instance = $cm->instance;
	148	$form->modulename = $module->name;
90845098	149	$form->fullmodulename = $fullmodulename;
b5fe4c93	150	$form->instancename = $instance->name;
f9903ed0	151
	152	include("mod_delete.html");
	153
	154	exit;
	155
	156
	157	} else if (isset($update)) { // value = course module
	158
	159	if (! $cm = get_record("course_modules", "id", $update)) {
	160	error("This course module doesn't exist");
	161	}
	162
	163	if (! $course = get_record("course", "id", $cm->course)) {
	164	error("This course doesn't exist");
	165	}
	166
	167	if (! $module = get_record("modules", "id", $cm->module)) {
	168	error("This module doesn't exist");
	169	}
	170
	171	if (! $form = get_record($module->name, "id", $cm->instance)) {
	172	error("The required instance of this module doesn't exist");
	173	}
	174
b5fe4c93	175	if (! $cw = get_record("course_sections", "id", $cm->section)) {
b5fe4c93	176	error("This course section doesn't exist");
f9903ed0	177	}
f9903ed0	178
7ce20f09	179	if (isset($return)) {
	180	$SESSION->returnpage = "$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id";
	181	save_session("SESSION");
	182	}
	183
2a9da9ef	184	$form->coursemodule = $cm->id;
b5fe4c93	185	$form->section = $cm->section; // The section ID
	186	$form->course = $course->id;
	187	$form->module = $module->id;
	188	$form->modulename = $module->name;
	189	$form->instance = $cm->instance;
	190	$form->mode = "update";
f9903ed0	191
963301c5	192	$sectionname = get_string("name$course->format");
90845098	193	$fullmodulename = strtolower(get_string("modulename", $module->name));
963301c5	194
	195	if ($form->section) {
	196	$heading->what = $fullmodulename;
	197	$heading->in = "$sectionname $cw->section";
	198	$pageheading = get_string("updatingain", "moodle", $heading);
	199	} else {
	200	$pageheading = get_string("updatinga", "moodle", $fullmodulename);
	201	}
f9903ed0	202
	203
	204	} else if (isset($add)) {
	205
	206	if (!$add) {
	207	redirect($HTTP_REFERER);
	208	die;
	209	}
	210
	211	require_variable($id);
b5fe4c93	212	require_variable($section);
f9903ed0	213
	214	if (! $course = get_record("course", "id", $id)) {
	215	error("This course doesn't exist");
	216	}
	217
	218	if (! $module = get_record("modules", "name", $add)) {
	219	error("This module type doesn't exist");
	220	}
	221
b5fe4c93	222	$form->section = $section; // The section number itself
f9903ed0	223	$form->course = $course->id;
	224	$form->module = $module->id;
	225	$form->modulename = $module->name;
	226	$form->instance = $cm->instance;
	227	$form->mode = "add";
	228
963301c5	229	$sectionname = get_string("name$course->format");
90845098	230	$fullmodulename = strtolower(get_string("modulename", $module->name));
90845098	231
b5fe4c93	232	if ($form->section) {
963301c5	233	$heading->what = $fullmodulename;
	234	$heading->to = "$sectionname $form->section";
	235	$pageheading = get_string("addinganewto", "moodle", $heading);
	236	} else {
	237	$pageheading = get_string("addinganew", "moodle", $fullmodulename);
f9903ed0	238	}
	239
	240	} else {
	241	error("No action was specfied");
	242	}
	243
	244	require_login($course->id);
	245
0d97d1e3	246	if (!isteacher($course->id)) {
f9903ed0	247	error("You can't modify this course!");
	248	}
	249
963301c5	250	$streditinga = get_string("editinga", "moodle", $fullmodulename);
22710216	251	$strmodulenameplural = get_string("modulenameplural", $module->name);
963301c5	252
29769ed4	253	if ($course->category) {
963301c5	254	print_header("$course->shortname: $streditinga", "$course->fullname",
29769ed4	255	"<A HREF=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</A> ->
22710216	256	<A HREF=\"$CFG->wwwroot/mod/$module->name/index.php?id=$course->id\">$strmodulenameplural</A> ->
963301c5	257	$streditinga", "form.name", "", false);
29769ed4	258	} else {
963301c5	259	print_header("$course->shortname: $streditinga", "$course->fullname",
963301c5	260	"$streditinga", "form.name", "", false);
29769ed4	261	}
f9903ed0	262
109613b2	263	unset($SESSION->modform); // Clear any old ones that may be hanging around.
	264	save_session("SESSION");
	265
f9903ed0	266	$modform = "../mod/$module->name/mod.html";
	267
	268	if (file_exists($modform)) {
	269
	270	print_heading($pageheading);
	271	print_simple_box_start("center", "", "$THEME->cellheading");
	272	include($modform);
	273	print_simple_box_end();
	274
	275	} else {
	276	notice("This module cannot be added to this course yet!", "$CFG->wwwroot/course/view.php?id=$course->id");
	277	}
	278
	279	print_footer($course);
	280
f9903ed0	281	?>