<?php
/*
Plugin Name: CSV Importer
Description: Import data as posts from a CSV file. <em>You can reach the author at <a href="mailto:d.v.kobozev@gmail.com">d.v.kobozev@gmail.com</a></em>.
Version: 0.2.4
Author: Denis Kobozev
*/

/**
 * LICENSE: The MIT License {{{
 *
 * Copyright (c) <2009> <Denis Kobozev>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @author    Denis Kobozev <d.v.kobozev@gmail.com>
 * @copyright 2009 Denis Kobozev
 * @license   The MIT License
 * }}}
 */

class CSVImporterPlugin {
    var $reserved_fields = array(
        'csv_post_title',
        'csv_post_post',
        'csv_post_excerpt',
        'csv_post_date',
        'csv_post_tags',
        'csv_post_categories',
        'csv_post_author',
        'csv_post_slug',
    );

    // option name => default value
    var $options = array(
        'csv_importer_import_as_draft' => 'publish',
        'csv_importer_import_post_type' => 'post',
        'csv_importer_cat' => 0
    );

    var $log = array();

    // A bit of abstraction above WordPress option saving mechanism to
    // make our life easier
    function save_options($request) {
        foreach ($this->options as $opt_name => $default) {
            $value = $default;
            if (array_key_exists($opt_name, $request)) {
                $value = $request[$opt_name];
            }
            if (false === get_option($opt_name)) {
                add_option($opt_name, $value);
            } else {
                update_option($opt_name, $value);
            }
        }
    }

    function get_option($opt_name) {
        if (($value = get_option($opt_name)) === false) {
            $value = $this->options[$opt_name];
        }
        return $value;
    }

    // Plugin's interface
    function form() {
        if ('POST' == $_SERVER['REQUEST_METHOD']) {
            $this->save_options($_POST);
            $this->post();
        }

        $opt_draft = $this->get_option('csv_importer_import_as_draft');
        $opt_type = $this->get_option('csv_importer_import_post_type');
        $opt_cat = $this->get_option('csv_importer_cat');

        // form HTML {{{
?>

<div class="wrap">
    <h2>Import CSV</h2>
    <form class="add:the-list: validate" method="post" enctype="multipart/form-data">
        <p><label><input name="csv_importer_import_as_draft" type="checkbox" <?php if ('draft' == $opt_draft) { echo 'checked="checked"'; } ?> value="draft" /> Import posts as drafts</label></p>
        <p><label><input name="csv_importer_import_post_type" type="checkbox" <?php if ('page' == $opt_type) { echo 'checked="checked"'; } ?> value="page" /> Import rows as pages, not posts</label></p>
        <p>Organize into category <?php wp_dropdown_categories(array('show_option_all' => 'Select one ...', 'hide_empty' => 0, 'hierarchical' => 1, 'show_count' => 0, 'name' => 'csv_importer_cat', 'orderby' => 'name', 'selected' => $opt_cat));?><br/>
            <small>This will create new categories inside the category parent you choose.</small></p>
        <p><label for="csv_import">Upload file:</label><br/>
            <input name="csv_import" id="csv_import" type="file" value="" aria-required="true" /></p>
        <p class="submit"><input type="submit" class="button" name="submit" value="Import" /></p>
    </form>
</div><!-- end wrap -->

<?php
        // end form HTML }}}

    }

    function print_messages() {
        if (!empty($this->log)) {

        // messages HTML {{{
?>

<div class="wrap">
    <?php if (!empty($this->log['error'])): ?>

    <div class="error">

        <?php foreach ($this->log['error'] as $error): ?>
            <p><?php echo $error; ?></p>
        <?php endforeach; ?>

    </div>

    <?php endif; ?>

    <?php if (!empty($this->log['notice'])): ?>

    <div class="updated fade">

        <?php foreach ($this->log['notice'] as $notice): ?>
            <p><?php echo $notice; ?></p>
        <?php endforeach; ?>

    </div>

    <?php endif; ?>
</div><!-- end wrap -->

<?php
        // end messages HTML }}}

            $this->log = array();
        }
    }

    // Handle POST submission
    function post() {
        if (empty($_FILES['csv_import']['tmp_name'])) {
            $this->log['error'][] = 'No file uploaded, aborting.';
            $this->print_messages();
            return;
        }

        require_once 'File_CSV_DataSource/DataSource.php';

        $time_start = microtime(true);
        $csv = new File_CSV_DataSource;
        $file = $_FILES['csv_import']['tmp_name'];
        $this->stripBOM($file);

        if (!$csv->load($file)) {
            $this->log['error'][] = 'Failed to load file, aborting.';
            $this->print_messages();
            return;
        }

        // pad shorter rows with empty values
        $csv->symmetrize();

        $skipped = 0;
        $imported = 0;
        foreach ($csv->connect() as $csv_data) {
            if ($post_id = $this->create_post($csv_data)) {
                $imported++;
                $this->create_custom_fields($post_id, $csv_data);
            } else {
                $skipped++;
            }
        }

        if (file_exists($file)) {
            @unlink($file);
        }

        $exec_time = microtime(true) - $time_start;

        if ($skipped) {
            $this->log['notice'][] = "<b>Skipped {$skipped} posts (most likely due to empty title, body and excerpt).</b>";
        }
        $this->log['notice'][] = sprintf("<b>Imported {$imported} posts in %.2f seconds.</b>", $exec_time);
        $this->print_messages();
    }

    function create_post($data) {
        $status = $this->get_option('csv_importer_import_as_draft');
        $type = $this->get_option('csv_importer_import_post_type');

        $defaults = array();
        foreach ($this->reserved_fields as $k) {
            $defaults[$k] = null;
        }
        $data = array_merge($defaults, $data);

        $new_post = array(
            'post_title' => convert_chars($data['csv_post_title']),
            'post_content' => wpautop(convert_chars($data['csv_post_post'])),
            'post_status' => $status,
            'post_type' => $type,
            'post_date' => $this->parse_date($data),
            'post_excerpt' => "<img style='float: left; padding: 5px;' src='{$data['custom_field_1']}'/>" . convert_chars($data['csv_post_excerpt']),
            'post_name' => $data['csv_post_slug'],
            'post_author' => $this->get_auth_id($data['csv_post_author']),
        );

        if ('post' == $type) {
            $new_post['tags_input'] = $data['csv_post_tags'];

            // setup categories before inserting
            $cats = $this->create_categories($data);
            $new_post['post_category'] = array_merge($cats['old'], $cats['new']);
        }

        // create!
        $id = wp_insert_post($new_post);

        if ('post' == $type && !$id) {
            // cleanup new categories on failure
            foreach ($cats['new'] as $c) {
                wp_delete_term($c, 'category');
            }
        }
        return $id;
    }

    // Lookup existing categories or create new ones
    function create_categories($data) {
        $opt_cat = $this->get_option('csv_importer_cat');
        $ids = array(
            'old' => array(),
            'new' => array(),
        );
        $category_names = explode(',', $data['csv_post_categories']);
        foreach ($category_names as $cat_name) {
            $cat_name = trim($cat_name);

            if (!empty($cat_name)) {
                // Searching or creating the category
                if (is_numeric($cat_name)) {
                    // it's an id, not a name
                    if (null !== get_category($cat_name)) {
                        $ids['old'][] = $cat_name;
                    } else {
                        $this->log['error'][] = "There is no category with id {$cat_name}.";
                    }
                } else {
                    $term = is_term($cat_name, 'category', $opt_cat);
                    if (!$term) {
                        $category = array(
                            'cat_name' => $cat_name,
                            'category_description' => '',
                            'category_nicename' => sanitize_title($cat_name),
                            'category_parent' => $opt_cat,
                        );
                        $cat_id = wp_insert_category($category);
                        $ids['new'][] = $cat_id;
                    } else {
                        $ids['old'][] = $term['term_id'];
                    }
                }
            }
        }
        return $ids;
    }

    function create_custom_fields($post_id, $data) {
        foreach ($data as $k => $v) {
            if ((array_search($k, $this->reserved_fields) === false) && $v != '' && $k != '') {
                add_post_meta($post_id, $k, $v);
            }
        }
    }

    function get_auth_id($author) {
        if (is_numeric($author)) return $author;
        $author_data = get_userdatabylogin($author);
        return (!$author_data) ? 0 : $author_data->ID;
    }

    // Convert date in CSV file to 1999-12-31 23:52:00 format
    function parse_date($data) {
        $timestamp = strtotime($data['csv_post_date']);
        if (false === $timestamp) {
            return '';
        } else {
            return date('Y-m-d H:i:s', $timestamp);
        }
    }

    // delete BOM from UTF-8 file
    function stripBOM($fname) {
        $res = fopen($fname, 'rb');
        if (false !== $res) {
            $bytes = fread($res, 3);
            if ($bytes == pack('CCC', 0xef, 0xbb, 0xbf)) {
                $this->log['notice'][] = 'Getting rid of byte order mark...';
                fclose($res);

                $contents = file_get_contents($fname);
                if (false === $contents) {
                    trigger_error('Failed to get file contents.', E_USER_WARNING);
                }
                $contents = substr($contents, 3);
                $success = file_put_contents($fname, $contents);
                if (false === $success) {
                    trigger_error('Failed to put file contents.', E_USER_WARNING);
                }
            } else {
                fclose($res);
            }
        } else {
            $this->log['error'][] = 'Failed to open file, aborting.';
        }
    }
}


function csv_admin_menu() {
    require_once ABSPATH . '/wp-admin/admin-functions.php';
    $plugin = new CSVImporterPlugin;
    add_management_page('edit.php', 'CSV Importer', 9, __FILE__, array($plugin, 'form'));
}

add_action('admin_menu', 'csv_admin_menu');

?>