Update Data Proposal

public function updatedataproposal_post()
    {
        $username = trim($this->post('username'));
        $id       = $this->post('id');

        if ($username == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Username kosong.',
            ];
        } elseif ($id == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'ID Proposal kosong.',
            ];
        } elseif ($this->post('tanggal1') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Dari Tanggal harus diisi.',
            ];
        } elseif ($this->post('tanggal2') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Sampai Tanggal harus diisi.',
            ];
        } elseif ($this->post('judul') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Judul harus diisi.',
            ];
        } elseif ($this->post('lstPusatStudi') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Pusat Studi harus dipilih.',
            ];
        } elseif ($this->post('lstSkim') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Kategori harus dipilih.',
            ];
        } elseif ($this->post('tempat') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Tempat Penelitian harus diisi.',
            ];
        } elseif ($this->post('metode') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Metode Penelitian harus diisi.',
            ];
        } elseif ($this->post('masalah') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Masalah Penelitian harus diisi.',
            ];
        } elseif ($this->post('tujuan') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Tujuan Penelitian harus diisi.',
            ];
        } elseif ($this->post('luaran') == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Luaran yang dihasilkan harus diisi.',
            ];
        } elseif ($this->post('dana') == '' || $this->post('dana') == 0) {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Dana Usulan harus diisi.',
            ];
        } else {
            if (!empty($_FILES['file_pdf']['name'])) {
                $jam                     = time();
                $config['file_name']     = 'Proposal_' . $username . '_' . $jam . '.pdf';
                $config['upload_path']   = './upload_file/proposal/';
                $config['allowed_types'] = 'pdf';
                $config['overwrite']     = true;
                $config['max_size']      = 0;
                $this->load->library('upload', $config);
                if (!$this->upload->do_upload('file_pdf')) {
                    $response = [
                        'resp_error' => true,
                        'resp_msg'   => 'File harus PDF.',
                    ];
                } else {
                    $dtBudget      = $this->db->get_where('lemlit_skim', array('skim_id' => $this->post('lstSkim')))->row();
                    $budget        = $dtBudget->skim_budget;
                    $budget_rupiah = number_format($budget, 0, '', ',');
                    $dana          = $this->post('dana');

                    if ($dana > $budget) {
                        $response = [
                            'resp_error' => true,
                            'resp_msg'   => 'Usulan Dana Melebihi Budget, Budget = ' . $budget_rupiah,
                        ];
                    } else {

                        $data = array(
                            'skim_id'           => $this->post('lstSkim'),
                            'pusat_studi_id'    => $this->post('lstPusatStudi'),
                            'propose_title'     => strtoupper($this->post('judul')),
                            'propose_title_seo' => seo_title($this->post('judul')),
                            'propose_place'     => strtoupper($this->post('tempat')),
                            'propose_method'    => trim($this->post('metode')),
                            'propose_masalah'   => trim($this->post('masalah')),
                            'propose_fund'      => $this->post('dana'),
                            'propose_budget'    => $budget,
                            'propose_purpose'   => trim($this->post('tujuan')),
                            'propose_luaran'    => trim($this->post('luaran')),
                            'propose_date1'     => $this->post('tanggal1'),
                            'propose_date2'     => $this->post('tanggal2'),
                            'propose_proposal'  => $this->upload->file_name,
                            'propose_date'      => date('Y-m-d'),
                            'propose_update'    => date('Y-m-d H:i:s'),
                        );

                        $this->db->where('propose_id', $id);
                        $this->db->update('lemlit_propose', $data);

                        $response = [
                            'resp_error' => false,
                            'resp_msg'   => 'Proposal Berhasil di Update.',
                        ];
                    }
                }
            } else {
                $dtBudget      = $this->db->get_where('lemlit_skim', array('skim_id' => $this->post('lstSkim')))->row();
                $budget        = $dtBudget->skim_budget;
                $budget_rupiah = number_format($budget, 0, '', ',');
                $dana          = $this->post('dana');

                if ($dana > $budget) {
                    $response = [
                        'resp_error' => true,
                        'resp_msg'   => 'Usulan Dana Melebihi Budget, Budget = ' . $budget_rupiah,
                    ];
                } else {

                    $data = array(
                        'skim_id'           => $this->post('lstSkim'),
                        'pusat_studi_id'    => $this->post('lstPusatStudi'),
                        'propose_title'     => strtoupper($this->post('judul')),
                        'propose_title_seo' => seo_title($this->post('judul')),
                        'propose_place'     => strtoupper($this->post('tempat')),
                        'propose_method'    => trim($this->post('metode')),
                        'propose_masalah'   => trim($this->post('masalah')),
                        'propose_fund'      => $this->post('dana'),
                        'propose_budget'    => $budget,
                        'propose_purpose'   => trim($this->post('tujuan')),
                        'propose_luaran'    => trim($this->post('luaran')),
                        'propose_date1'     => date("Y-m-d", strtotime($this->post('tanggal1'))),
                        'propose_date2'     => date("Y-m-d", strtotime($this->post('tanggal2'))),
                        'propose_date'      => date('Y-m-d'),
                        'propose_update'    => date('Y-m-d H:i:s'),
                    );

                    $this->db->where('propose_id', $id);
                    $this->db->update('lemlit_propose', $data);

                    $response = [
                        'resp_error' => false,
                        'resp_msg'   => 'Proposal Berhasil di Update.',
                    ];
                }
            }
        }

        $this->response($response, 200);
    }