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New module 'Recently read'

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Manuel Cillero 2017-07-26 19:41:12 +02:00
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GNU GENERAL PUBLIC LICENSE
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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== SUMMARY ==
The Recently Read module displays the history of recently read content (nodes)
a particular user has viewed. Each authenticated user has its own history
recorded, so this module may be useful i.e. for displaying recently viewed
products on the e-commerce site. The history is displayed as a block and each
content type gets its own block.
If you need more flexibility, this module can be replaced by properly configured
Flag, Rules and Views modules. Check out the following links for more details:
* http://drupal.org/node/405754
* http://jan.tomka.name/blog/list-recently-viewed-nodes-drupal
For a full description of the module, visit the project page:
http://drupal.org/sandbox/pgorecki/1080970
To submit bug reports and feature suggestions, or to track changes:
http://drupal.org/project/issues/1080970
== REQUIREMENTS ==
None.
== INSTALLATION ==
* Install as usual, see http://drupal.org/node/70151 for further information.
== CONFIGURATION ==
* Customize the module settings in Administer >> Site configuration >>
Recently read content. On this pace you can:
- Select which content types will should be tracked by the module
After enabling content type tracking, go to Administer >> Site building >>
Blocks to configure the block settings of each tracked content type.
- Recently read list length specifies the maximum number of nodes
per user per content type that will be stored in a databse. Note that this
is different from "Maximum number of links to display in the block" setting
available in the Recently read block configutation options.
== CUSTOMIZATION ==
Recently read module lacks UI for advanced configuration, but most tasks can
be easily implemented by code snippets or in the theme layer.
* Displaying more than a node title
By default, Recently Read block displays a list of links to node titles.
You can customize the output by overriding theme_recently_read_item() and
theme_recently_read_item_list() functions in your theme.
For example, to display an image field and a link:
function mytemplate_recently_read_item($item) {
$output = '';
if ($item['type'] == 'page') {
$node = node_load($item['nid']);
if (isset($node->field_image[0])) {
$output .= theme('imagefield_item', $node->field_image[0]);
}
}
$output .= l($item['title'], 'node/' . $item['nid']);
return $output;
}
* Multiple content types in the same block
To display multiple content types in the same block, create a new block with PHP body
and modify the following examlpe to your needs:
<?php
// disable page caching if this block is displayed
recently_read_disable_page_cache();
// get 3 recently read pages and articles items for current user
// (you can skip the last argument to display all items)
global $user;
user_is_logged_in() ? $user_id = $user->uid : 0;
$items = recently_read_get_read_items(array('page', 'article'), $user_id, 3);
// get html string with all items
return theme('recently_read_item_list', array('items' => $items));
?>
-- CONTACT --
Current maintainer:
* Przemyslaw Gorecki (pgorecki) - http://drupal.org/user/642012

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name = Recently read
description = Tracks the history of recently read content by each user.
core = 6.x
package = Other
; Information added by drupal.org packaging script on 2012-03-02
version = "6.x-1.0-beta1"
core = "6.x"
project = "recently_read"
datestamp = "1330713350"

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<?php
/**
* @file
* Recently read installation file.
* Displays a history of recently read nodes by currently logged in user.
*/
/**
* Implementation of hook_schema().
*/
function recently_read_schema() {
$schema['recently_read_nodes'] = array(
'description' => 'Table for history of read nodes',
'fields' => array(
'nid' => array(
'description' => 'The {node}.nid of the read node.',
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0
),
'type' => array(
'description' => 'The type of the read node.',
'type' => 'varchar',
'length' => 32,
'not null' => TRUE,
'default' => ''
),
'uid' => array(
'description' => 'The {user}.uid that read the node.',
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0
),
'timestamp' => array(
'description' => 'The time the node has been read.',
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0
)
),
'primary key' => array('nid', 'uid')
);
return $schema;
}
/**
* Implementation of hook_install().
*/
function recently_read_install() {
drupal_install_schema('recently_read');
}
/**
* Implementation of hook_uninstall().
*/
function recently_read_uninstall() {
drupal_uninstall_schema('recently_read');
variable_del('recently_read_node_types');
variable_del('recently_read_max_entries');
variable_del('recently_read_max_length');
}

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<?php
/**
* @file
* Recently read module file.
* Displays a history of recently read nodes by currently logged in user.
*
*
* @todo: create a function that deletes a history
* @todo: create recently_read_node_was_read($nid, $uid)
* @todo: remove current if on node page
@todo: truncate number of rr in the block to number of elements from block settings
*/
/**
* Implementation of hook_menu().
*/
function recently_read_menu() {
$items['admin/settings/recently-read'] = array(
'title' => 'Recently read content',
'description' => 'Tracks the history of recently read content by each user.',
'page callback' => 'drupal_get_form',
'page arguments' => array('recently_read_settings'),
'access arguments' => array('administer site configuration'),
'type' => MENU_NORMAL_ITEM,
);
return $items;
}
/**
* Implementation of hook_theme().
*/
function recently_read_theme() {
return array(
'recently_read_item' => array(
'arguments' => array('item' => NULL)
),
'recently_read_item_list' => array(
'arguments' => array('item' => NULL)
),
);
}
/**
* Implementation of hook_block().
*/
function recently_read_block($op = 'list', $delta = 0, $edit = array()) {
switch ($op) {
case 'list':
// each enabled content type has its own block
$types = node_get_types();
$enabled = variable_get('recently_read_node_types', array('page', 'story'));
$blocks = array();
foreach ($enabled as $key) {
$blocks[$key]['info'] = t('Recently read - @type', array('@type' => $types[$key]->name));
$blocks[$key]['cache'] = BLOCK_NO_CACHE;
}
return $blocks;
case 'configure':
// allow user to customize the length of a list for each node type
$max_entries = variable_get('recently_read_max_entries', 10);
$max_count = variable_get("recently_read_max_length", array('page' => 10, 'story' => 10));
$form['items_count'] = array(
'#type' => 'textfield',
'#title' => t('Maximum number of links to display in the block'),
'#description' => t('Enter the positive integer value, less or equal to %limit.',
array('%limit' => $max_entries)
),
'#default_value' => (key_exists($delta, $max_count)) ? $max_count[$delta] : $max_entries,
);
return $form;
case 'save':
// save configuration settings
$max_entries = variable_get('recently_read_max_entries', 10);
$value = max(1, min($edit['items_count'], $max_entries));
$max_count = variable_get('recently_read_max_length', array('page' => 10, 'story' => 10));
$max_count[$delta] = $value;
variable_set('recently_read_max_length', $max_count);
return;
case 'view':
// disable caching of entire page if recently read block is being displayed
recently_read_disable_page_cache();
// view block containing links to recently visited nodes
global $user;
$max_entries = variable_get('recently_read_max_entries', 10);
$max_count = variable_get('recently_read_max_length', array('page' => 10, 'story' => 10));
isset($max_count[$delta]) ? $limit = $max_count[$delta] : $limit = $max_entries;
$items = recently_read_get_read_items(array($delta), $user->uid, $limit);
$types = node_get_types();
return array(
'subject' => t('Recently read - @type', array('@type' => $types[$delta]->name)),
'content' => theme('recently_read_item_list', $items)
);
}
}
function recently_read_exit() {
global $user;
drupal_bootstrap(DRUPAL_BOOTSTRAP_PATH);
// track history for authenticated user
if ((arg(0) == 'node') && is_numeric(arg(1)) && arg(2) == '') {
$nid = arg(1);
// get node type
$type = db_result(db_query('SELECT type FROM {node} WHERE nid = %d', $nid));
// track history for authenticated user
if (recently_read_is_enabled($type) && $user->uid) {
$record = new stdClass();
$record->nid = $nid;
$record->type = $type;
$record->uid = $user->uid;
$record->timestamp = time();
$count = db_result(db_query(
'SELECT COUNT(*) FROM {recently_read_nodes} WHERE nid = %d AND uid = %d AND type = "%s"',
$nid, $user->uid, $type
));
// a node has been viewed before, make an update
if ($count > 0) {
drupal_write_record('recently_read_nodes', $record, array('nid', 'uid'));
}
// a node has not been viewed before, add new row
else {
drupal_write_record('recently_read_nodes', $record);
}
}
// track history for anonymous user
if (recently_read_is_enabled($type) && !$user->uid && variable_get('recently_read_anonymous_enabled', FALSE)) {
$key = "recently_read-$type";
if (!isset($_SESSION[$key])) {
$_SESSION[$key] = array();
}
// remove previous entry, if present
unset($_SESSION[$key][$nid]);
// add new entry at the beginning of array
$title = db_result(db_query('SELECT title FROM {node} WHERE nid = %d', $nid));
$entry = array(
'nid' => $nid,
'title' => $title,
'type' => $type,
'timestamp' => time()
);
$_SESSION[$key] = array($nid => $entry) + $_SESSION[$key];
while (count($_SESSION[$key]) > variable_get('recently_read_max_entries', 10)) {
array_pop($_SESSION[$key]);
}
}
// remove old entries
$nids = array();
$result = db_query("SELECT nid FROM {recently_read_nodes} WHERE uid = %d and type = '%s' ORDER BY timestamp DESC LIMIT %d,1000",
$user->uid,
$type,
variable_get('recently_read_max_entries', 10)+1
);
while ($nid = db_result($result)) {
$nids[] = $nid;
};
if (count($nids)) {
$placeholders = implode(',', array_fill(0, count($nids), "%d"));
db_query("DELETE FROM {recently_read_nodes} WHERE uid = %d AND nid IN($placeholders)",
array_merge((array) $user->uid, $nids)
);
}
}
}
/*
* Form builder; Configure recently read settings.
*/
function recently_read_settings() {
$types = node_get_types();
$options = array();
foreach ($types as $key => $type) {
$options[$key] = $type->name;
}
$form['node_types'] = array(
'#type' => 'checkboxes',
'#title' => t('Enable history tracking of the following content'),
'#description' => t('Select which content types will be tracked.'),
'#default_value' => variable_get('recently_read_node_types', array('page', 'story')),
'#options' => $options
);
$form['anonymous_enabled'] = array(
'#type' => 'checkbox',
'#title' => t('Enable history tracking for anonymous users'),
'#description' => t('If disabled, user must be logged to view recently read blocks.'),
'#default_value' => variable_get('recently_read_anonymous_enabled', FALSE)
);
$form['max_entries'] = array(
'#type' => 'textfield',
'#title' => t('Recently read list length'),
'#description' => 'Provide the maximum number of entires stored for each read content type (per user) in the database.',
'#default_value' => variable_get('recently_read_max_entries', 10),
'#required' => TRUE
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Save configuration')
);
return $form;
}
function recently_read_settings_validate($form, &$form_state) {
$max = $form_state['values']['max_entries'];
if (!is_numeric($max) || $max < 1) {
form_set_error('max_entries', t('%field must be a positive integer value.',
array('%field' => $form['max_entries']['#title'])
));
}
}
function recently_read_settings_submit($form, &$form_state) {
$selected = array();
foreach ($form_state['values']['node_types'] as $value) {
if ($value) {
$selected[] = $value;
}
}
variable_set('recently_read_node_types', $selected);
variable_set('recently_read_max_entries', $form_state['values']['max_entries']);
variable_set('recently_read_anonymous_enabled', $form_state['values']['anonymous_enabled']);
drupal_set_message(t('The configuration options have been saved.'));
}
/*
* Function that checks if a specific node type history tracking has been enabled
*/
function recently_read_is_enabled($node_type) {
$enabled_types = variable_get('recently_read_node_types', array('page', 'story'));
return in_array($node_type, $enabled_types);
}
/*
* Get a list of recently read items by node types and for a specific user,
* sorted by read date.
*
* @param $node_types
* An array of node types.
*
* @param $user_id
* Id of a user whose list is returned.
*
* @param $limit
* Number of items to return (zero to return all)
*
* @return
* An array of recently read items. Each item is an array.
* Properties of the item: nid, title, type, timestamp
*/
function recently_read_get_read_items($node_types, $user_id, $limit = 0) {
// normalize arguments
if (!is_array($node_types)) {
$node_types = array($node_types);
}
if ($limit == 0) {
$limit = variable_get('recently_read_max_entries', 10) * count($node_types);
}
// get history from _SESSION variable if anonymous
if ($user_id==0 && variable_get('recently_read_anonymous_enabled', FALSE)) {
$items = array();
foreach ($node_types as $node_type) {
$key = "recently_read-$node_type";
if (isset($_SESSION[$key]) && is_array($_SESSION[$key])) {
$items = $items + $_SESSION[$key];
}
}
usort($items, '_recently_read_sort_fcn');
$items = array_slice($items, 0, $limit);
}
// get history from database if authenticated
if ($user_id > 0) {
// make a list of links to recently read nodes which are published
$placeholders = db_placeholders($node_types, 'text');
// prepare args for sql query
$args = array($user_id);
$args = array_merge($args, $node_types);
$args[] = $limit;
$result = db_query(db_rewrite_sql("SELECT n.nid, n.title, n.type, rr.timestamp FROM {node} n
INNER JOIN {recently_read_nodes} rr
ON n.nid = rr.nid WHERE rr.uid = %d AND n.status = 1 AND n.type IN($placeholders)
ORDER BY rr.timestamp DESC
LIMIT 0, %d"),
$args
);
$items = array();
while ($row = db_fetch_array($result)) {
$items[] = $row;
}
}
return $items;
}
/*
* Disables page caching. Call this function if you want to display recently read content (i.e. block).
*/
function recently_read_disable_page_cache() {
$GLOBALS['conf']['cache'] = FALSE;
}
/*
* Return a themed recently read item.
*
* @param $item
* An object containing the properties of the item.
* Properties used: nid, title, type, timestamp
* @return
* A themed HTML string containing a link to the recently read item.
*/
function theme_recently_read_item($item) {
return l($item['title'], 'node/' . $item['nid']);
}
/**
* Return a themed list of recently read items.
*
* @param $items
* An array of recently read items to be displayed in the list.
* @return
* A string containing the list output.
*
*/
function theme_recently_read_item_list($items) {
if (count($items)==0) {
return t('Nothing has been read yet.');
}
// theme each individual item on the list
foreach ($items as &$item) {
$item = theme('recently_read_item', $item);
}
// theme the list
return theme('item_list', $items);
}
/*
* Compare function for sorting recently read items
*/
function _recently_read_sort_fcn($a, $b) {
$delta = $b['timestamp'] - $a['timestamp'];
if ($delta > 0) return 1;
if ($delta < 0) return -1;
return 0;
}