Vicente Russo Neto » CodeIgniter

CodeIgniter: Date And Time Manipulation Class v0.2

Vicente Russo Neto — Thu, 04 Nov 2010 23:38:17 +0000

Just made a new version of this class to fit a new project I’m doing. Dropped deprecated functions, added time manipulation and few code redesign.

if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
*
* Class dateOperations
* Created in July 07, 2009, by Vicente Russo Neto
* Modified on November 04, 2010, by Vicente Russo Neto
*
* @param integer $date - the date to be processed
* @param string $what - what piece of date to process. Values: day|month|year|hour|minute|second
* @param integer $value - how much will be increased or decreased
* @param string $return_format - 'mysql' format or 'timestamp' format
* @author Vicente Russo Neto
* @return string|boolean
* @version 0.2
*
* Description: This class can add or subtract days, months, years, hours, minutes, seconds and return the result. Created for
* PHP Framework CodeIgniter (www.codeigniter.com). Tested on 1.7.2.
*
* Usage:
* echo '
'.$this->dateoperations->sum('2010-11-04','day',1,FALSE); // Prints: 2010-11-05
* echo '
'.$this->dateoperations->sum('2010-11-04 00:00:00','minute',15); // Prints: 2010-11-04 00:15:00
* echo '
'.$this->dateoperations->subtract('2010-11-04 00:00:00','second',35); // Prints: 2010-11-03 23:59:25
* echo '
'.$this->dateoperations->subtract('2010-11-04 00:00:00','year',1); // Prints: 2009-11-04 00:00:00
* echo '
'.$this->dateoperations->subtract('2010-11-04 00:00:00','day',15, FALSE); // Prints: 2010-10-20
*/

class dateOperations {

public function sum ($date,$what,$value,$full=TRUE,$return_format='mysql') {

$return = $this->calculate($date,$what,$value,'sum',$full,$return_format);
return $return;

}

public function subtract ($date,$what,$value,$full=TRUE,$return_format='mysql') {

$return = $this->calculate($date,$what,$value,'subtract',$full,$return_format);
return $return;

}

private function calculate($date,$what,$value,$operation,$full,$return_format) {

// checking args
if($operation!='sum' && $operation!='subtract') return FALSE;
if ($what!='day' && $what!='month' && $what!='year' && $what!='hour' && $what!='minute' && $what!='second') return FALSE;

// validating date or datetime
if (!preg_match('/\\A(?:^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\\s(((0?[0-9])|(1[0-9])|(2[0-3]))\\:([0-5][0-9])((\\s)|(\\:([0-5][0-9])))?))?$)\\z/', $date)) {
return FALSE;
}

/* From this point I'm sure its a valid date or datetime no matter what */

$only_date = substr($date, 0, 10);
$only_time = substr($date, 11, 8);

list($year, $month, $day) = explode("-", $only_date);

if ($what=='day') $day = $operation=='sum' ? intval($day) + intval($value) : intval($day) - intval($value) ;
if ($what=='month') $month = $operation=='sum' ? intval($month) + intval($value) : intval($month) - intval($value);
if ($what=='year') $year = $operation=='sum' ? intval($year) + intval($value) : intval($year) - intval($value);

$hour = $minute = $second = 0;

if($only_time!='') { // we have time too!

list($hour, $minute, $second) = explode(":", $only_time);

if ($what=='hour') $hour = $operation=='sum' ? intval($hour) + intval($value) : intval($hour) - intval($value);
if ($what=='minute') $minute = $operation=='sum' ? intval($minute) + intval($value) : intval($minute) - intval($value);
if ($what=='second') $second = $operation=='sum' ? intval($second) + intval($value) : intval($second) - intval($value);

}

$date_tmp = mktime($hour, $minute, $second, $month, $day, $year);

if ($return_format=='mysql') {
if($full) $date_tmp = date('Y-m-d H:i:s', $date_tmp); // return date and time
else $date_tmp = date('Y-m-d', $date_tmp); // return only date
} elseif (!$return_format=='timestamp') {
return FALSE;
}

return $date_tmp;

}

}

/* End of file dateOperations.php */
/* Location: ./application/libraries/dateOperations.php */

Put the dateOperations.php file on application/libraries folder.
Usage examples:

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$this->load->library('dateoperations');

echo '
'.$this->dateoperations->sum('2010-11-04','day',1,FALSE); // Prints: 2010-11-05
echo '
'.$this->dateoperations->sum('2010-11-04 00:00:00','minute',15); // Prints: 2010-11-04 00:15:00
echo '
'.$this->dateoperations->subtract('2010-11-04 00:00:00','second',35); // Prints: 2010-11-03 23:59:25
echo '
'.$this->dateoperations->subtract('2010-11-04 00:00:00','year',1); // Prints: 2009-11-04 00:00:00
echo '
'.$this->dateoperations->subtract('2010-11-04 00:00:00','day',15, FALSE); // Prints: 2010-10-20

Download dateOperations v0.2

CodeIgniter: Date Manipulation Class

Vicente Russo Neto — Wed, 08 Jul 2009 22:13:37 +0000

I made myself a class make some basic operations, like adding and subtracting days, months or years from a date, and return in mysql-ready format or timestamp. Here`s the code:

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if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
*
* Class dateOperations
* Created in July 07, 2009, by Vicente Russo Neto
*
* @param integer $date - the date to be processed
* @param string $what - what piece of date to process, day, month or year
* @param integer $value - how much will be increased or decreased
* @param string $return_format - 'mysql' format or 'timestamp' format
* @author Vicente Russo Neto
* @return string|boolean
* @version 0.1
*
* Description: This class can add or subtract days, months or years and return the result. Created for
* PHP Framework CodeIgniter (www.codeigniter.com). Tested on 1.7.1.
*
* Usage:
* $this->load->library('dateoperations');
* echo $this->dateoperations->subtract('2009-07-01','day',1); // Prints: 2009-06-30
* echo $this->dateoperations->sum('2009-07-01','year',1); // Prints: 2010-07-01
* echo $this->dateoperations->subtract('2009-07-01','day',15); // Prints: 2009-06-16
*/

class dateOperations {

function sum($date,$what=FALSE,$value,$return_format='mysql') {

list($year, $month, $day) = split("-", $date);

if ($what!='day' && $what!='month' && $what!='year') return false;

if ($what=='day') $day = $day + intval($value);
if ($what=='month') $month = $month + intval($value);
if ($what=='year') $year = $year + intval($value);

$date_tmp = mktime(0, 0, 0, $month, $day, $year);

if ($return_format=='mysql') {
$date_tmp = date('Y-m-d', $date_tmp);
} elseif (!$return_format=='timestamp') {
return false;
}

return $date_tmp;

}

function subtract($date,$what=FALSE,$value,$return_format='mysql') {

list($year, $month, $day) = split("-", $date);

if ($what!='day' && $what!='month' && $what!='year') return false;

if ($what=='day') $day = $day - intval($value);
if ($what=='month') $month = $month - intval($value);
if ($what=='year') $year = $year - intval($value);

$date_tmp = mktime(0, 0, 0, $month, $day, $year);

if ($return_format=='mysql') {
$date_tmp = date('Y-m-d', $date_tmp);
} elseif (!$return_format=='timestamp') {
return false;
}

return $date_tmp;

}

}

?>

Put the dateOperations.php file on application/libraries folder.

Usage examples:

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$this->load->library('dateoperations');
echo $this->dateoperations->subtract('2009-07-01','day',1); // Prints: 2009-06-30
echo $this->dateoperations->sum('2009-07-01','year',1); // Prints: 2010-07-01
echo $this->dateoperations->subtract('2009-07-01','day',15); // Prints: 2009-06-16

?>

Download the library

CodeIgniter Folder Icons for Leopard

Vicente Russo Neto — Sun, 03 May 2009 14:55:17 +0000

Hello there! I decided to play a bit and make some folder icons. So here is my contribution for mac developers on this great framework. I made 3 versions, yellow, red and default blue color.

The icon set includes sizes from 16px to 512px, and real folders (just drag and drop on “get info” dialog). As is the case with any downloads I make available here, please do not redistribute the icons or attempt to pass them off as your own.

Download codeigniter_iconset.zip (2.03MB)

CodeIgniter: Dicas

Vicente Russo Neto — Tue, 10 Mar 2009 13:25:54 +0000

Hoje eu vou dar alguams dicas que eu uso em todo projeto envolvendo CI. Primeiro, no “url_helper“, eu fiz a seguinte modificação na função base_url():

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if ( ! function_exists('base_url'))
{
function base_url($link=FALSE)
{
$CI =& get_instance();
$baseUrl = $CI->config->slash_item('base_url');
if ($link===TRUE) $baseUrl .= $CI->config->slash_item('index_page');
return $baseUrl;
}
}

Isso me permite usar a função em links, onde eu não sei se o host final suporta mod_rewrite. Assim, eu posso usar

1	base_url(TRUE)?>

que ele automaticamente coloca o index.php antes dos controllers dependendo do seu config.php, e em caso de imagens e inserts de .js, ou .css, é só usar normalmente, base_url(). Normalmente não mecho com o Core do CodeIgniter, portanto eu salvei uma copia do url_helper modificado na minha pasta helpers dentro da pasta application.

Segundo. Essa é muito simples. Quando eu uso a classe Form Validation, e eu tenho um campo em branco que não é obrigatório, e obviamente eu nao precisaria usar uma função set_rules, o campo não é preenchido. No entanto, se eu usar uma função set_rules sem especificar uma regra,

1	$this->form_validation->set_rules('field_name', '', '');

eu consigo deixar o campo em branco no formulário, mas se eu digitar alguma coisa, o campo ainda assim é repopulado.

E por último, quando eu uso a classe de upload, as vezes eu tenho que apagar o arquivo quando eu edito um registro com uma foto, por exemplo. Entao eu preciso do caminho absoluto da raiz da aplicação. Não achei nenhuma constante definida pra este caso, então criei uma. No arquivo index.php, insira esta linha após a ultima declaração de constantes:

1	define('FULLPATH', pathinfo(__FILE__, PATHINFO_DIRNAME));

Agora, eu tenho a constante FULLPATH que guarda o caminho absoluto da minha aplocação. Espero que essas pequenas dicas tenham sido útil para alguem

CodeIgniter: Tips & Tricks

Vicente Russo Neto — Tue, 10 Mar 2009 12:23:28 +0000

Hello, Today I’ll post few modifications I use on every CI project. First, on the “url_helper“, I made this modification oon base_url() function:

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This allow me to use the base_url() function to work with and without the index.php. Sometimes you don’t know where your project will be hosted, and if the host supports mod_rewrite. In this case, on your links (those with index.php/controller) you just put

1	base_url(TRUE)?>

and you will get the index.php or not, depending on your configuration, on config.php. If I use the TRUE parameter, the “index.php” string will be inserted before the controllers. Of course, you can alter the function to something like base_url(‘link’), or base_url(1), or anything you like. I don’t like to mess with the CI Core, so I saved this new helper on application/helpers directory.

Another Tip. This is very simple. Using the form validation, when I have a not required field, it isn’t repopulated with set_value() function if you don’t set any rules for the field. But if you set a blank rule, it will work:

1	$this->form_validation->set_rules('field_name', '', '');

When I use upload class, sometimes I have to delete the file when I change the file on database. And then It’s a good thing to use the absolute path when deleting, so I made a small constant declaration to set my root folder, the folder with index.php inside. In the index.php, add this line on bottom of the constant declarations:

1	define('FULLPATH', pathinfo(__FILE__, PATHINFO_DIRNAME));

Now, my FULLPATH constant is set with my base directory. Hope this can be usefull to someone.

CodeIgniter: Friendly pagination with search system

Vicente Russo Neto — Thu, 29 Jan 2009 19:31:46 +0000

After a long pause, here am I. Well, there’s a few tutorials around, including the official CI wiki suggesting a more friendly pagination implementation, with page numbers on the link, because the actual CI pagination works with the offset from the database. The code I use today is from the official wiki, but the search system I implemented myself, So, here we go…

First, on the original file, we have the create_link() function. On mine, there is an argument $search, it will be permanent on every link, just like this: http://www.server.com/products/page/2/notebook-sony

I modified the ident style from CI Pagination.php, I Just can’t work with the Allman ident style (more info info: a href=”http://en.wikipedia.org/wiki/Indent_style”>wikipedia). Analising the whole code, there is no big tricks, I just concatenate the search argumento in the end of links.

Pagination.php:

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if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/

// ------------------------------------------------------------------------

/**
* Pagination Class
*
* @package CodeIgniter
* @subpackage Libraries
* @category Pagination
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/libraries/pagination.html
*/
class CI_Pagination {

var $base_url = ''; // The page we are linking to
var $total_rows = ''; // Total number of items (database results)
var $per_page = 10; // Max number of items you want shown per page
var $num_links = 2; // Number of "digit" links to show before/after the currently viewed page
var $cur_page = 0; // The current page being viewed
var $first_link = '‹ First';
var $next_link = '>';
var $prev_link = '<';
var $last_link = 'Last ›';
var $uri_segment = 3;
var $full_tag_open = '';
var $full_tag_close = '';
var $first_tag_open = '';
var $first_tag_close = ' ';
var $last_tag_open = ' ';
var $last_tag_close = '';
var $cur_tag_open = ' ';
var $cur_tag_close = '';
var $next_tag_open = ' ';
var $next_tag_close = ' ';
var $prev_tag_open = ' ';
var $prev_tag_close = '';
var $num_tag_open = ' ';
var $num_tag_close = '';
var $page_query_string = FALSE;
var $query_string_segment = 'per_page';

/**
* Constructor
*
* @access public
* @param array initialization parameters
*/
function CI_Pagination($params = array())
{
if (count($params) > 0)
{
$this->initialize($params);
}

log_message('debug', "Pagination Class Initialized");
}

// --------------------------------------------------------------------

/**
* Initialize Preferences
*
* @access public
* @param array initialization parameters
* @return void
*/
function initialize($params = array())
{
if (count($params) > 0)
{
foreach ($params as $key => $val)
{
if (isset($this->$key))
{
$this->$key = $val;
}
}
}
}

// --------------------------------------------------------------------

/**
* Generate the pagination links
*
* @access public
* @return string
*/
function create_links($search='') {

if ($search!='') $search = '/'.$search;

// If our item count or per-page total is zero there is no need to continue.
if ($this->total_rows == 0 OR $this->per_page == 0) {
return '';
}

// Calculate the total number of pages
$num_pages = ceil($this->total_rows / $this->per_page);
// Is there only one page? Hm... nothing more to do here then.
if ($num_pages == 1) {
return '';
}

// Determine the current page number.
$CI =& get_instance();

if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE){
if ($CI->input->get($this->query_string_segment) != 0){
$this->cur_page = $CI->input->get($this->query_string_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
} else {
if ($CI->uri->segment($this->uri_segment) != 0) {
$this->cur_page = $CI->uri->segment($this->uri_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
}

if ( ! is_numeric($this->cur_page)) {
$this->cur_page = 0;
}

if ($this->cur_page==0) {
$this->cur_page = 1;
}

// Is the page number beyond the result range?
// If so we show the last page
if ($this->cur_page > $this->total_rows) {
$this->cur_page = ($num_pages - 1) * $this->per_page;
}

$uri_page_number = $this->cur_page;

// Calculate the start and end numbers. These determine
// which number to start and end the digit links with
$start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
$end = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;

// Is pagination being used over GET or POST? If get, add a per_page query
// string. If post, add a trailing slash to the base URL if needed
if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE) {
$this->base_url = rtrim($this->base_url).'&'.$this->query_string_segment.'=';
} else {
$this->base_url = rtrim($this->base_url, '/') .'/';
}

// And herwe go...
$output = '';

// Render the "First" link
if ($this->cur_page > $this->num_links) {
$output .= $this->first_tag_open.'.$this->base_url.'1'.$search.'">'.$this->first_link.''.$this->first_tag_close;
}

// Render the "previous" link
if (($this->cur_page - $this->num_links) >= 0) {
$i = $this->cur_page - 1;
if ($i == 0) $i = '';
$output .= $this->prev_tag_open.'.$this->base_url.$i.$search.'">'.$this->prev_link.''.$this->prev_tag_close;
}

// Write the digit links
for ($loop = $start -1; $loop <= $end; $loop++) {
$i = ($loop * $this->per_page) - $this->per_page;
if ($i >= 0) {
if ($this->cur_page == $loop) {
$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
} else {
$n = ($i == 0) ? '1' : $loop;
$output .= $this->num_tag_open.'.$this->base_url.$n.$search.'">'.$loop.''.$this->num_tag_close;
}
}
}

// Render the "next" link
if ($this->cur_page < $num_pages) {
$output .= $this->next_tag_open.'.$this->base_url.($this->cur_page + 1).$search.'">'.$this->next_link.''.$this->next_tag_close;
}

// Render the "Last" link
if (($this->cur_page + $this->num_links) < $num_pages) {
$i = $num_pages;
$output .= $this->last_tag_open.'.$this->base_url.$i.$search.'">'.$this->last_link.''.$this->last_tag_close;
}

// Kill double slashes. Note: Sometimes we can end up with a double slash
// in the penultimate link so we'll kill all double slashes.
$output = preg_replace("#([^:])//+#", "\\1/", $output);

// Add the wrapper HTML if exists
$output = $this->full_tag_open.$output.$this->full_tag_close;

return $output;
}
}
// END Pagination Class

/* End of file Pagination.php */
/* Location: ./system/libraries/Pagination.php */

Copy the above file inside the application/libraries, CI try to find the files there first, and if not found, it uses from the core library. Well, on controller I use three functions:

function index() { // Forcing the use of page function...
redirect('products/page/1');
}

/* Function search()
* Search function of the controller. If you have a "product" controller, the
* action form from of your view will be something like action="product/search"
*/
function search() {
$terms = array();
/*
* Here you have to adjust your "uri segment",
* if your controller is inside a directory
*/
if ($this->uri->segment(3)!='') {
/*
* Here, I suppose I already have a search running...
*/
$search = $this->uri->segment(3);
$search = str_replace(' ','-',$search);
valid_char_only($search); // Function to remove accents and invalid characters, use any function
// Preparando array
$aux = explode('-',$search);
foreach($aux as $key => $valor) {
$terms[] = $valor;
}
} else {
/*
* Here I get the value from the field (myField) and split if there is
* more than 2 words, and put an hyphen separating the words.
*/
$search = $this->input->post('myField');
$search = str_replace(' ','-',$search);
valid_char_only($search); // Function to remove accents and invalid characters, use any function
// Preparando array
$aux = explode('-',$search);
foreach($aux as $key => $valor) {
$terms[] = $valor;
}
}

/*
* You see, there is no database query in here, this function
* only format the url and send it to the controller that does
* everything, the "page" controller
*/
redirect('product/page/1/'.$search);

}

function page($page='',$terms='') {
/*
* If there is no page on argument, I force using the page 1
*/
if ($page=='') {
redirect('produto/page/1');
}

/*
* On my application, the segment 4 is the search string
*/
if ($this->uri->segment(4)!='') {
$terms = $this->uri->segment(4);
}

$this->load->library('pagination');

$limit = 20;
$offset = ($page-1)*$limit;

if ($terms=='') {
/*
* If there is no search, I do the normal query
*/
$this->db->limit($limit, $offset);
$query = $this->db->get('products');
$data['total'] = $query->num_rows();
} else {
/*
* Preparing the search, spliting the terms and inserting
* one LIKE for each field on database
*/
$search = str_replace(' ','-',$terms);
// Preparing array
$mysearch = array();
$aux = explode('-',$search);
foreach($aux as $key => $valor) {
$mysearch[] = $valor;
}

/*
* On this example, I'm using only one search field,
* but looking for 3 fields on table on same time, name, id, and description.
*/
$this->db->like('name', $mysearch[0]);
$this->db->or_like('id', $mysearch[0]);
$this->db->or_like('description', $mysearch[0]);

$tt = count($mysearch);
if ($tt>0) {
for ($j=1;$j<$tt;$j++) {
$this->db->or_like('name', $mysearch[$j]);
$this->db->or_like('id', $mysearch[$j]);
$this->db->or_like('description', $mysearch[$j]);
}
}

/*
* Here I recover the total number of products,
* just to show the total on my view;
*/
$query_tt = $this->db->get('products');

$this->db->like('name', $mysearch[0]);
$this->db->or_like('id', $mysearch[0]);
$this->db->or_like('description', $mysearch[0]);

$tt = count($mysearch);
if ($tt>0) {
for ($j=1;$j<$tt;$j++) {
$this->db->or_like('name', $mysearch[$j]);
$this->db->or_like('id', $mysearch[$j]);
$this->db->or_like('description', $mysearch[$j]);
}
}

$this->db->limit($limit, $offset);
$query = $this->db->get('products');
$data['total'] = $query_tt->num_rows();

}

$config['base_url'] = base_url().INDEX.'product/page/';
$config['total_rows'] = $data['total'];
$config['per_page'] = $limit;
$config['uri_segment'] = 3;
$config['num_links'] = 5;

$this->pagination->initialize($config);

$data['num_of_pges'] = round($data['total'] / $limit);
$data['products'] = $query;

$this->load->view('products',$data);
}

Well, using this class, your website will search things in the following format:

http://www.server.com/products/page/13/notebook-sony

http://www.server.com/products/page/10/cannon-digital-cam

Just to mention, I didn’t tested with query strings on!

CodeIgniter: Paginação mais coerente com sistema de busca

Vicente Russo Neto — Thu, 29 Jan 2009 18:56:19 +0000

Depois de longa pausa, cá estou. Bom, existem alguns tutoriais e artigos por aí, inclusive no wiki do CodeIgniter explicando como usar uma paginação mais coerente. Digo isso pois a paginação atual do CI trabalha com o offset do SQL, e não com o número da página em si. O código que uso hoje foi retirado do wiki, já o sistema de busca integrado eu mesmo desenvolvi pois não achei nada no wiki.Bom, vamos às modificações:

Primeiro, no arquivo original temos a funcao create_links(). Agora ela terá um arqumento “$search”, que será passado após o numero de paginas, por exemplo http://www.site.com.br/produtos/pagina/2/notebook-sony. Alterei toda a identação da classe de Paginação, não consigo trabalhar com o estilo de Allman (mais info: wikipedia). Analisando o código inteiro, não preciso me prolongar muito, eu simplesmente adicionei um parâmetro na função de criar links, para concatenar o resultado da busca nos links das páginas.

Pagination.php:

Basta copiar o arquivo acima dentro de sua pasta application/libraries, assim o CI usará o da sua aplicação ao inves da classe encontrada no core. Bom, no controler, eu uso sempre estas 3 funções:

function index() { // Forçando o uso da funcao pagina...
redirect('produtos/pagina/1');
}
/* Function busca()
* Funcao de busca do controller. Imagine que seja o controler Produto,
* então a action do formulário seria algo como action="produto/busca"
*/
function busca() {
$termos = array();
/*
* Aqui você deve ajustar o seu "uri segment", de acordo com a sua aplicação, caso
* seu controller esteja dentro de uma pasta física no servidor, enfim...
*/
if ($this->uri->segment(3)!='') {
/*
* Neste if, estou suponto que eu já tenho uma procura em andamento
*/
$search = $this->uri->segment(4);
$search = str_replace(' ','-',$search);
acento_nao($search); // Função para retirar acentos, use uma qualquer
// Preparando array
$aux = explode('-',$search);
foreach($aux as $key => $valor) {
$termos[] = $valor;
}
} else {
/*
* Aqui eu recupero o valor do campo do formulario (valor), e caso
* seja duas ou mais palavras, separo por hífen.
*/
$search = $this->input->post('valor');
$search = str_replace(' ','-',$search);
acento_nao($search); // Função para retirar acentos, use uma qualquer
// Preparando array
$aux = explode('-',$search);
foreach($aux as $key => $valor) {
$termos[] = $valor;
}
}

/*
* Redirecionando para o controller de produto.
* Repare que nesta funcao busca(), apesar do nome,
* eu não faço nenhuma busca, apenas formato a URL
* e redireciono para a funcao "pagina", que é quem
* faz todo o trabalho.
*/
redirect('produto/pagina/1/'.$search);

}

function pagina($page='',$termos='') {
/*
* Se não existe nenhum valor de página, então eu forço a usar valor 1,
* e seguro qualquer mensagem de alteração de dados, ex: "Produto X alterado com sucesso"
*/
if ($page=='') {
$this->session->keep_flashdata('mensagem');
redirect('produto/pagina/1');
}

/*
* Na minha aplicação, o segmento 4 é a string de busca
*/
if ($this->uri->segment(4)!='') {
$termos = $this->uri->segment(4);
}

$this->load->library('pagination');

$limit = 20;
$offset = ($page-1)*$limit;

if ($termos=='') {
/*
* Se não tenho nenhuma string pra procurar, sigo a busca normal no banco
*/
$this->db->limit($limit, $offset);
$query = $this->db->get('produtos');
$data['total'] = $query->num_rows();
/*
* Aqui eu defino o search como vazio, pois na view eu vou usar algo
* como "buscando resultados para a busca "notebook sony". Se o $search
* estiver vazio na view, então eu não exibo a mensagem.
*/
$search = '';

} else {
/*
* Preparando a busca, "recortando" o termos e inserindo em um LIKE
* cada termo da busca
*/
$search = str_replace(' ','-',$termos);
// Preparando array
$busca = array();
$aux = explode('-',$search);
foreach($aux as $key => $valor) {
$busca[] = $valor;
}

/*
* No exemplo em questão estou usando apenas UM campo (valor) no formulario,
* mas procurando ao mesmo tempo em 3 campos, nome, codigo e descricao.
* Voce pode adaptar pra vários campos, no entanto.
*/
$this->db->like('nome', $busca[0]);
$this->db->or_like('codigo', $busca[0]);
$this->db->or_like('descricao', $busca[0]);

$tt = count($busca);
if ($tt>0) {
for ($j=1;$j<$tt;$j++) {
$this->db->or_like('nome', $busca[$j]);
$this->db->or_like('codigo', $busca[$j]);
$this->db->or_like('descricao', $busca[$j]);
}
}

/*
* Aqui eu recupero o total de produtos, para exibir a mensagem
* Exibindo X produtos de um total de Y.
*/
$query_tt = $this->db->get('produtos');

$this->db->like('nome', $busca[0]);
$this->db->or_like('codigo', $busca[0]);
$this->db->or_like('descricao', $busca[0]);

$tt = count($busca);
if ($tt>0) {
for ($j=1;$j<$tt;$j++) {
$this->db->or_like('nome', $busca[$j]);
$this->db->or_like('codigo', $busca[$j]);
$this->db->or_like('descricao', $busca[$j]);
}
}

$this->db->limit($limit, $offset);
$query = $this->db->get('produtos');
$data['total'] = $query_tt->num_rows();

}

$config['base_url'] = base_url().INDEX.'produtos/pagina/';
$config['total_rows'] = $data['total'];
$config['per_page'] = $limit;
$config['uri_segment'] = 3;
$config['num_links'] = 5;

$this->pagination->initialize($config);

$data['num_de_paginas'] = round($data['total'] / $limit);
$data['produtos'] = $query;

$this->load->view('administracao/admin',$data);
}

Bom, usando essa classe, seus links terão o seguinte formato:

http://www.site.com.br/produtos/pagina/13/notebook-sony

http://www.site.com.br/produtos/pagina/10/cannon-maquina-digital

Lembrando que eu nao testei, e provavelmente não funcionará com query strings!

CodeIgniter: Templates e Internacionalização

Vicente Russo Neto — Sat, 31 May 2008 14:12:56 +0000

Encontrei uma maneira rápida e fácil de usar várias línguas com templates. Acho que não é um sistema de templates de verdade, mas por enquanto, está dando conta do recado. Depois da configuração inicial do meu CodeIgniter, decidi implementar um sistema de várias linguas. Seguindo esse tutorial, notei que cada página (view) traduzida é na verdade um arquivo independente, Não achei isso legal, pois se meu designer precisa mudar uma tag ou uma propriedade, ele teria que mudar em todas as views.

O truque é simples, e certamente deve haver outra forma mais elegante de fazer isso. O artigo acima diz que se eu tenho uma visão “myview”, eu não preciso adicionar um sufixo caso eu esteja na minha língua padrão, mas em outras línguas, eu preciso do sufixo do código da língua, por exemplo _pt, _en, etc. Mas no meu caso, todas as línguas deverão ter seu próprio sufixo, até mesmo a língua padrão, e a minha view sem sufixo é na verdade o template da página.

O código abaixo mostra o meu controlador chamando meu template:

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if (!defined('BASEPATH')) exit('No direct script access allowed');

//Remember to include this
require_once('i18n.php');

class Myview extends i18n {

function Myview()
{
parent::i18n();
}

function index()
{
$this->load_view('myview'); // Aqui eu carrego o meu template que será interceptado
}
}

/* End of file welcome.php */
/* Location: ./system/application/controllers/welcome.php */

Minha pequena modificação começa aqui. Eu não preciso chamar myview_pt pelo controlador (nesse caso eu teria que fazer uma checagem de qual lingua o usuario selecionou), porque o controlador modificado do artigo citado faz isso automaticamente. Então eu apenas crio myview_en.php e myview_pt.php (assumingo que tenho apenas essas duas línguas), e o conteudo desses arquivos seria algo mais ou menos assim:

1 2	$this->lang->load('myview', 'english'); ?> include('myview.php'); ?>

Na primeira linha, “myview” é um arquivo localizado em system/language/english/myview_lang.php

Dessa forma eu coloco todo o meu html e css no myview.php e trabalho simulando um template. Espero que alguem venha comentar esse post dizendo “Olha, é assim que se faz corretamente”, mas até lá eu vou trabalando dessa forma pois assim pelo menos está resolvendo meu problema.

Até a próxima!

CodeIgniter Internationalization with Templates

Vicente Russo Neto — Sat, 31 May 2008 13:49:32 +0000

I found an easy way to use i18n with Templates. I think it’ not a REAL template system, but I got the job done. After the first config of my CodeIgniter setup I decided to implement a multilingual system. Following these steps I noticed that every translated page has it’s own view. This is not good, if my designer change one tag, one line, he would have to change every translated view.

The trick is simple, and I guess there is another elegant way to do this. The article I read said if I have a custom view called “myview”, I don’t need to rename this file to work with my default language, but my translated view must have a suffix, myview_pt.php for example. But in my case, even the default language must have the suffix, and the view without the suffix is my template.

The code bellow shows my custom controller, loading my view

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if (!defined('BASEPATH')) exit('No direct script access allowed');

//Remember to include this
require_once('i18n.php');

class Myview extends i18n {

function Myview()
{
parent::i18n();
}

function index()
{
$this->load_view('myview'); // Here I load my template that will be intercepted
}
}

/* End of file welcome.php */
/* Location: ./system/application/controllers/welcome.php */

My little modification begins here. I don’t need to call myview_pt from controller (checking what language first), because the modified controller from de article automaticaly does that. So, I simply create myview_en.php and myview_pt.php (assuming there is only those two languages), and the content of these files would be something like that:

1 2	$this->lang->load('myview', 'english'); ?> include('myview.php'); ?>

On the first line, “myview” is a language file located on system/language/english/myview_lang.php.

This way I can put my whole html/css stuff on myview.php and work simulating a template. I hope someone could say in the comments “here’s the better way to do this” but until there I’ll use this tricky code to get things working.

That’s all!

Fixing CodeIgniter and .htaccess issues on Leopard

Vicente Russo Neto — Thu, 29 May 2008 16:47:51 +0000

Hello

This is my first post and I’ll try to show you guys a few configurations regarding CodeIgniter with Leopard. First I was having problems with .htaccess and mode_rewrite, to remove de “index.php”. Searching CodeIgniter forums, many many people had same problem, 500 Internal Erros, 403 Forbidden and so on. I was almost givin up, when I tried working with Virtual Hosts on apache, witch is the best and the correct solution in my case, because I develop many sites. Well, just for the record, I’m not using pack solutions, like apachefriends.org, just de built-in apache+php5, and installed mysql.

I’ll show you how i solved my problem using Virtual Hosts. You have to edit the following files:

/etc/hosts
/private/etc/apache2/httpd.conf
/private/etc/apache2/extra/httpd-vhosts.conf

I used textmate, using terminal, type sudo mate . If you dont have textmate, use sudo open . It will open the default texteditor of MacOSx. Put your password and here we go:

hosts file:

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##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
127.0.0.1 testsite1.dev # Site no.1
127.0.0.1 testsite2.dev # Site no.2.
127.0.0.1 testsitex.dev # Here you can add as many lines (sites) you develop.
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost

You don’t have to reboot the system or apache. In this example, if you type in safari “testsite1.dev”, you will be forward to the site configured in Virtual Hosts, even if “testsite1.dev” exists on internet.

httpd file:
this is a long file, so I’ll show a few parts. On my config, I commented the following line, I don’t have many users on my macbook, I only have my own user, so I don’t need this module to be loaded:

1	#LoadModule userdir_module libexec/apache2/mod_userdir.so

This is very very important to be sure these line are uncommented:

1	LoadModule rewrite_module libexec/apache2/mod_rewrite.so

and

1 2	# Virtual hosts Include /private/etc/apache2/extra/httpd-vhosts.conf

I don’t think you need to edit any thing more on this file. The last and more importante file is where you will setup avery website you develop.

httpd-vhosts file:

Do not touch this line:

1	NameVirtualHost *:80

Here is the root of your sites

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*:80>
DocumentRoot "/Users/

/Sites"
ServerName localhost
>

And here your Virtual Hosts:

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*:80>
DocumentRoot "/Users/

/Sites/

"
ServerName testsite1.dev
"/Users//Sites/

">
AllowOverride All
Options +FollowSymLinks
Order allow,deny
Allow from All
>
>

The following lines allow me to use the functions of .htaccess to remove the index.php, and fix the 403 forbidden problems.

1 2	AllowOverride All Options +FollowSymLinks

When I was not using virtual hosts, I configured the single webserver on apache, and used something like that:

http://127.0.0.1/website1/webroot/

http://127.0.0.1/website2/webroot/

http://127.0.0.1/website-etc/webroot/

I had 500 Internal Server problems, and I’m almost sure it’s because the “root” of my “website1″ not being the actual root of my webserver.

Here is my .htaccess config:

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RewriteEngine on
RewriteBase /
# Hide the application and system directories by redirecting the request to index.php
RewriteRule ^(application|system|\.svn) index.php/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [QSA,L]

So, I hope a could help anyone having the same problems I had. This mini-tutorial was tested on Mac OS X 10.5.2, and I think it might work on windows and linux too, because it’s more apache stuff.