information-system/application/models/feedback_model.php

<?php

class Feedback_model extends CI_Model {

    function __construct() {
        parent::__construct();
        $this->HT = $this->load->database('HT', TRUE);
    }

    /**
     * 根据城市英文名查找最新八条反馈信息
    */
    function get_feedback_by_city_list($city_name_list) {

        $feedback_query =
            $this->HT->query("
            select top 8
              tad_content, tai_customerid, tai_title, tai_getdate, tai_url, vci.cii2_name
            from Eva_TAInfo 
                left join Eva_TADetail on TAD_TAI_SN=TAI_SN
                left join  V_CIty_Info vci on vci.cii_sn = tai_cii_sn and vci.LGC_LGC = 1
            where TAD_Content is not null and vci.cii2_name = ?
            order by tai_getdate desc",
                array($city_name_list[0]));

        $first_city_num = $feedback_query->num_rows();
        $feedback_result = $feedback_query->result();
        $feedback_list = [];

        foreach ($feedback_result as $feedback_row) {
            $createdOn = new DateTime($feedback_row->tai_getdate);
            $createdOnString = $createdOn->format('M Y');
    
            $feedback = [
                'title' => $feedback_row->tai_title,
                'customer' => $feedback_row->tai_customerid,
                'content' => $feedback_row->tad_content,
                'url' => $feedback_row->tai_url,
                'createdOn' => $createdOnString
            ];
            $feedback_list[] = $feedback;
        }

        $enough_count = 8 - $first_city_num;
        
        if ($enough_count > 0 && count($city_name_list) > 1) {
            
            $feedback_query =
                $this->HT->query("
                    select top ?
                    tad_content, tai_customerid, tai_title, tai_getdate, tai_url, vci.cii2_name
                    from Eva_TAInfo 
                        left join Eva_TADetail on TAD_TAI_SN=TAI_SN
                        left join  V_CIty_Info vci on vci.cii_sn = tai_cii_sn and vci.LGC_LGC = 1
                    where TAD_Content is not null and vci.cii2_name = ?
                    order by tai_getdate desc",
                    array($enough_count, $city_name_list[1]));
            $feedback_result = $feedback_query->result();
    
            foreach ($feedback_result as $feedback_row) {
                $createdOn = new DateTime($feedback_row->tai_getdate);
                $createdOnString = $createdOn->format('M Y');
        
                $feedback = [
                    'title' => $feedback_row->tai_title,
                    'customer' => $feedback_row->tai_customerid,
                    'content' => $feedback_row->tad_content,
                    'url' => $feedback_row->tai_url,
                    'createdOn' => $createdOnString
                ];
                $feedback_list[] = $feedback;
            }
        }

        return $feedback_list;
    }

    /**
     * 根据城市英文名查找最新一条反馈信息
    */
    function get_feedback_by_city($city_name) {

        $feedback_query =
            $this->HT->query("
            select top 1
              tad_content, tai_customerid, tai_title, tai_getdate, tai_url, vci.cii2_name
            from Eva_TAInfo 
                left join Eva_TADetail on TAD_TAI_SN=TAI_SN
                left join  V_CIty_Info vci on vci.cii_sn = tai_cii_sn and vci.LGC_LGC = 1
            where TAD_Content is not null and vci.cii2_name = ?
            order by tai_getdate desc",
                array($city_name));

        $feedback_row = $feedback_query->row();

        $createdOn = new DateTime($feedback_row->tai_getdate);
        $createdOnString = $createdOn->format('M Y');

        $feedback = [
            'title' => $feedback_row->tai_title,
            'customer' => $feedback_row->tai_customerid,
            'content' => $feedback_row->tad_content,
            'url' => $feedback_row->tai_url,
            'createdOn' => $createdOnString
        ];

        return $feedback;
    }
}