NEW FEATURE: Activity Link allows the teacher to display a link to another activity, which is in the same course,

at the end of the Lesson.

mod/lesson/db/mysql.php

@@ -212,6 +212,10 @@ function lesson_upgrade($oldversion) {
         table_column('lesson', '', 'mediaheight', 'int', '10', 'unsigned', '100', 'not null', 'mediafile');
         table_column('lesson', '', 'mediawidth', 'int', '10', 'unsigned', '650', 'not null', 'mediafile');
     }
+
+	if ($oldversion < 2005110200) {
+        table_column('lesson', '', 'activitylink', 'int', '10', 'unsigned', '0', 'not null', 'tree');
+	}
          
     return true;
 }

mod/lesson/db/mysql.sql

@@ -28,6 +28,7 @@ CREATE TABLE `prefix_lesson` (
   `maxtime` INT(10) UNSIGNED NOT NULL DEFAULT '0',
   `retake` int(3) unsigned NOT NULL default '1',
   `tree` TINYINT(3) UNSIGNED NOT NULL DEFAULT '0',
+  `activitylink` INT(10) UNSIGNED NOT NULL DEFAULT '0',
   `mediafile` varchar(255) NOT NULL default '',
   `mediaheight` INT(10) UNSIGNED NOT NULL DEFAULT '100',
   `mediawidth` INT(10) UNSIGNED NOT NULL DEFAULT '650',

mod/lesson/db/postgres7.php

@@ -294,6 +294,10 @@ function lesson_upgrade($oldversion) {
         table_column('lesson', '', 'mediawidth', 'INT', '10', 'unsigned', '650', 'not null', 'mediafile');
     }
 
+	if ($oldversion < 2005110200) {
+        table_column('lesson', '', 'activitylink', 'INT', '10', 'unsigned', '0', 'not null', 'tree');
+	}
+
    return true;
 }
 

mod/lesson/db/postgres7.sql

@@ -22,6 +22,7 @@ CREATE TABLE prefix_lesson (
   maxtime INT8  NOT NULL DEFAULT '0',
   retake INT  NOT NULL default '1',
   tree INT  NOT NULL DEFAULT '0',
+  activitylink INT8  NOT NULL default '0',
   mediafile varchar(255) NOT NULL default '',
   mediaheight INT  NOT NULL DEFAULT '100',
   mediawidth INT  NOT NULL DEFAULT '650',

mod/lesson/mod.html

@@ -129,6 +129,9 @@ if ($form->mode == "add") {
         $form->completed = $conditions->completed;
         $form->gradebetterthan = $conditions->gradebetterthan;
     }
+    if (!isset($form->activitylink)) {
+        $form->activitylink = 0;
+    }
     
     $form->deleteattempts = "";
 
@@ -536,6 +539,51 @@ if ($form->mode == "add") {
     </td>
 </tr>
 
+<tr>
+    <td align="right"><b><?php print_string("activitylink", "lesson"); ?>:</b></td>
+    <td>
+    <?php
+        // get the modules
+        $mods = get_course_mods($form->course);
+        $modinstances = array();
+        foreach ($mods as $mod) {
+            if ($mod->instance == $form->instance) {  // don't add this lesson
+                continue;
+            }
+            // get the module name and then store it in a new array
+            if ($module = get_coursemodule_from_instance($mod->modname, $mod->instance, $form->course)) {
+                $modinstances[$mod->modname][$module->id] = $module->name;
+            }
+        }
+        ksort($modinstances); // sort by module name
+
+        // print out a select dropdown with optgroups
+        echo '<select id="menuactivitylink" name="activitylink">';
+        if ($form->activitylink == 0) {
+            echo '<option selected="selected" value="0">'.get_string('none')."</option>\n";
+        } else {
+            echo '<option value="0">'.get_string('none')."</option>\n";
+        }
+        foreach ($modinstances as $module => $instances) {
+            echo '<optgroup label="'.get_string('modulename', $module).'">'."\n";
+            
+            asort($instances);
+            foreach ($instances as $modid => $instance) {
+                if ($form->activitylink == $modid) {  // check for being selected
+                    echo '<option selected="selected" value="'.$modid.'">'.$instance."</option>\n";
+                } else {
+                    echo '<option value="'.$modid.'">'.$instance."</option>\n";
+                }
+            }
+            echo "</optgroup>\n";
+        }
+        echo "</select>\n";
+        
+        helpbutton("activitylink", get_string("activitylink", "lesson"), "lesson");
+    ?>
+    </td>
+</tr>
+
 <tr>
     <td align="right"><b><?php print_string("mediafile", "lesson"); ?>:</b></td>
     <td>

mod/lesson/version.php

@@ -5,7 +5,7 @@
 ///  This fragment is called by moodle_needs_upgrading() and /admin/index.php
 /////////////////////////////////////////////////////////////////////////////////
 
-$module->version  = 2005102800;  // The current module version (Date: YYYYMMDDXX)
+$module->version  = 2005110200;  // The current module version (Date: YYYYMMDDXX)
 $module->requires = 2005021600;  // Requires this Moodle version
 $module->cron     = 0;           // Period for cron to check this module (secs)
 

mod/lesson/view.php

@@ -1216,6 +1216,18 @@
             } elseif ($lesson->modattempts && isteacher($course->id)) {
                 echo "<p align=\"center\">".get_string("modattemptsnoteacher", "lesson")."</p>";                
             }
+			
+			if ($lesson->activitylink) {
+				if ($module = get_record('course_modules', 'id', $lesson->activitylink)) {
+					if ($modname = get_field('modules', 'name', 'id', $module->module))
+						if ($instance = get_record($modname, 'id', $module->instance)) {
+				            echo "<div align=\"center\" style=\"padding: 5px;\" class=\"lessonbutton standardbutton\">".
+									"<a href=\"$CFG->wwwroot/mod/$modname/view.php?id=$instance->id\">".
+									get_string('activitylinkname', 'lesson', $instance->name)."</a></div>\n";
+						}
+				}
+			}
+
             echo "<div align=\"center\" style=\"padding: 5px;\" class=\"lessonbutton standardbutton\"><a href=\"../../course/view.php?id=$course->id\">".get_string("mainmenu", "lesson")."</a></div>\n"; // Back to the menu (course view).
             echo "<div align=\"center\" style=\"padding: 5px;\" class=\"lessonbutton standardbutton\"><a href=\"../../grade/index.php?id=$course->id\">".get_string("viewgrades", "lesson")."</a></div>\n"; //view grades
         }