<?php

/*
 * ITFlow - GET/POST request handler for client documents
 */

defined('FROM_POST_HANDLER') || die("Direct file access is not allowed");

if (isset($_POST['add_document'])) {

    enforceUserPermission('module_support', 2);

    require_once 'document_model.php';

    $contact_id = intval($_POST['contact'] ?? 0);
    $asset_id = intval($_POST['asset'] ?? 0);

    // Document add query
    mysqli_query($mysqli,"INSERT INTO documents SET document_name = '$name', document_description = '$description', document_content = '$content', document_content_raw = '$content_raw', document_folder_id = $folder, document_created_by = $session_user_id, document_client_id = $client_id");
    
    $document_id = mysqli_insert_id($mysqli);

    if ($contact_id) {
        mysqli_query($mysqli,"INSERT INTO contact_documents SET contact_id = $contact_id, document_id = $document_id");
    }

    if ($asset_id) {
        mysqli_query($mysqli,"INSERT INTO asset_documents SET asset_id = $asset_id, document_id = $document_id");
    }

    logAction("Document", "Create", "$session_name created document $name", $client_id, $document_id);

    flash_alert("Document <strong>$name</strong> created");

    redirect();

}

if (isset($_POST['add_document_from_template'])) {

    // ROLE Check
    enforceUserPermission('module_support', 2);

    // GET POST Data
    $client_id = intval($_POST['client_id']);
    $document_name = sanitizeInput($_POST['name']);
    $document_description = sanitizeInput($_POST['description']);
    $document_template_id = intval($_POST['document_template_id']);
    $folder = intval($_POST['folder']);

    // GET Document Template Info
    $sql_document = mysqli_query($mysqli,"SELECT * FROM document_templates WHERE document_template_id = $document_template_id");

    $row = mysqli_fetch_array($sql_document);

    $document_template_name = sanitizeInput($row['document_template_name']);
    $content = mysqli_real_escape_string($mysqli,$row['document_template_content']);
    $content_raw = sanitizeInput($_POST['name'] . " " . str_replace("<", " <", $row['document_content']));

    // Document add query
    mysqli_query($mysqli,"INSERT INTO documents SET document_name = '$document_name', document_description = '$document_description', document_content = '$content', document_content_raw = '$content_raw', document_folder_id = $folder, document_created_by = $session_user_id, document_client_id = $client_id");

    $document_id = mysqli_insert_id($mysqli);

    logAction("Document", "Create", "$session_name created document $name from template $document_template_name", $client_id, $document_id);

    flash_alert("Document <strong>$document_name</strong> created from template");

    redirect("document_details.php?client_id=$client_id&document_id=$document_id");

}

if (isset($_POST['edit_document'])) {

    enforceUserPermission('module_support', 2);

    require_once 'document_model.php';
    $document_id = intval($_POST['document_id']);

    // Save Original Document as a Version
    $sql_original_document = mysqli_query($mysqli, "SELECT * FROM documents 
        WHERE document_client_id = $client_id AND document_id = $document_id"
    );

    $row = mysqli_fetch_array($sql_original_document);

    $original_document_name = sanitizeInput($row['document_name']);
    $original_document_description = sanitizeInput($row['document_description']);
    $original_document_content = mysqli_escape_string($mysqli, $row['document_content']);
    $original_document_created_by = intval($row['document_created_by']);
    $original_document_updated_by = intval($row['document_updated_by']);
    $original_document_created_at = sanitizeInput($row['document_created_at']);
    $original_document_updated_at = sanitizeInput($row['document_updated_at']);

    if ($original_document_updated_at) {
        $document_version_created_at = $original_document_updated_at;
    } else {
        $document_version_created_at = $original_document_created_at;
    }

    if ($original_document_updated_by) {
        $document_version_created_by = $original_document_updated_by;
    } else {
        $document_version_created_by = $original_document_created_by;
    }

    // Document add query
    mysqli_query($mysqli,"INSERT INTO document_versions SET document_version_name = '$original_document_name', document_version_description = '$original_document_description', document_version_content = '$original_document_content', document_version_created_by = $document_version_created_by, document_version_created_at = '$document_version_created_at', document_version_document_id = $document_id");

    $document_version_id = mysqli_insert_id($mysqli);

    // Update Document
    mysqli_query($mysqli,"UPDATE documents SET document_name = '$name', document_description = '$description', document_content = '$content', document_content_raw = '$content_raw', document_folder_id = $folder, document_updated_by = $session_user_id WHERE document_id = $document_id");

    logAction("Document", "Edit", "$session_name edited document $name, previous version kept", $client_id, $document_version_id);

    flash_alert("Document <strong>$name</strong> edited, previous version kept");

    redirect("document_details.php?client_id=$client_id&document_id=$document_id");
}

if (isset($_POST['move_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $folder_id = intval($_POST['folder']);

    // Get Document Name Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Folder Name for logging
    $sql_folder = mysqli_query($mysqli,"SELECT folder_name FROM folders WHERE folder_id = $folder_id");
    $row = mysqli_fetch_array($sql_folder);
    $folder_name = sanitizeInput($row['folder_name']);
    
    // Document edit query
    mysqli_query($mysqli,"UPDATE documents SET document_folder_id = $folder_id WHERE document_id = $document_id");

    logAction("Document", "Move", "$session_name moved document $document_name to folder $folder_name", $client_id, $document_id);

    flash_alert("Document <strong>$document_name</strong> moved to folder <strong>$folder_name</strong>");

    redirect();

}

if (isset($_POST['rename_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $client_id = intval($_POST['client_id']);
    $name = sanitizeInput($_POST['name']);

    // Get Document Name before renaming for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $old_document_name = sanitizeInput($row['document_name']);

    // Document edit query
    mysqli_query($mysqli,"UPDATE documents SET document_name = '$name' WHERE document_id = $document_id");

    logAction("Document", "Edit", "$session_name renamed document $old_document_name to $name", $client_id, $document_id);


    flash_alert("You renamed Document from <strong>$old_document_name</strong> to <strong>$name</strong>");

    redirect();

}

if (isset($_POST['bulk_move_document'])) {

    enforceUserPermission('module_support', 2);

    $folder_id = intval($_POST['bulk_folder_id']);

    // Get folder name for logging and Notification
    $sql = mysqli_query($mysqli,"SELECT folder_name, folder_client_id FROM folders WHERE folder_id = $folder_id");
    $row = mysqli_fetch_array($sql);
    $folder_name = sanitizeInput($row['folder_name']);
    $client_id = intval($row['folder_client_id']);

    // Move Documents to Folder Loop
    if (isset($_POST['document_ids'])) {

        // Get Selected Count
        $count = count($_POST['document_ids']);

        foreach($_POST['document_ids'] as $document_id) {
            $document_id = intval($document_id);
            // Get document name for logging
            $document_name = sanitizeInput(getFieldById('documents', $document_id, 'document_name'));

            // Document move query
            mysqli_query($mysqli,"UPDATE documents SET document_folder_id = $folder_id WHERE document_id = $document_id");

            logAction("Document", "Move", "$session_name moved document $document_name to folder $folder_name", $client_id, $document_id);
        }

        logAction("Document", "Bulk Move", "$session_name moved $count document(s) to folder $folder_name", $client_id);
    }

    flash_alert("You moved <strong>$count</strong> document(s) to the folder <strong>$folder_name</strong>");

    redirect();

}

if (isset($_POST['link_file_to_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $file_id = intval($_POST['file_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get File Name for logging
    $file_name = sanitizeInput(getFieldById('files', $file_id, 'file_name'));

    // Document add query
    mysqli_query($mysqli,"INSERT INTO document_files SET file_id = $file_id, document_id = $document_id");

    logAction("Document", "Link", "$session_name linked file $file_name to document $document_name", $client_id, $document_id);

    flash_alert("File <strong>$file_name</strong> linked with Document <strong>$document_name</strong>");

    redirect();

}

if (isset($_GET['unlink_file_from_document'])) {

    enforceUserPermission('module_support', 2);

    $file_id = intval($_GET['file_id']);
    $document_id = intval($_GET['document_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get File Name for logging
    $file_name = sanitizeInput(getFieldById('files', $file_id, 'file_name'));

    mysqli_query($mysqli,"DELETE FROM document_files WHERE file_id = $file_id AND document_id = $document_id");

    logAction("Document", "Unlink", "$session_name unlinked file $file_name from document $document_name", $client_id, $document_id);

    flash_alert("File <strong>$file_name</strong> unlinked from Document <strong>$document_name</strong>", 'error');

    redirect();

}

if (isset($_POST['link_vendor_to_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $vendor_id = intval($_POST['vendor_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Vendor Name for logging
    $vendor_name = sanitizeInput(getFieldById('vendors', $vendor_id, 'vendor_name'));

    // Document add query
    mysqli_query($mysqli,"INSERT INTO vendor_documents SET vendor_id = $vendor_id, document_id = $document_id");

    logAction("Document", "Link", "$session_name linked vendor $vendor_name to document $document_name", $client_id, $document_id);

    flash_alert("Vendor <strong>$vendor_name</strong> linked with Document <strong>$document_name</strong>");

    redirect();

}

if (isset($_GET['unlink_vendor_from_document'])) {

    enforceUserPermission('module_support', 2);

    $vendor_id = intval($_GET['vendor_id']);
    $document_id = intval($_GET['document_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Vendor Name for logging
    $vendor_name = sanitizeInput(getFieldById('vendors', $vendor_id, 'vendor_name'));

    mysqli_query($mysqli,"DELETE FROM vendor_documents WHERE vendor_id = $vendor_id AND document_id = $document_id");

    logAction("Document", "Unlink", "$session_name unlinked vendor $vendor_name from document $document_name", $client_id, $document_id);

    flash_alert("Vendor <strong>$vendor_name</strong> unlinked from Document <strong>$document_name</strong>", 'error');

    redirect();

}

if (isset($_POST['link_contact_to_document'])) {

    enforceUserPermission('module_support', 2);

    $client_id = intval($_POST['client_id']);
    $document_id = intval($_POST['document_id']);
    $contact_id = intval($_POST['contact_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Contact Name for logging
    $contact_name = sanitizeInput(getFieldById('contacts', $contact_id, 'contact_name'));

    // Contact add query
    mysqli_query($mysqli,"INSERT INTO contact_documents SET contact_id = $contact_id, document_id = $document_id");

    logAction("Document", "Link", "$session_name linked contact $contact_name to document $document_name", $client_id, $document_id);

    flash_alert("Contact <strong>$contact_name</strong> linked with Document <strong>$document_name</strong>");

    redirect();

}

if (isset($_GET['unlink_contact_from_document'])) {

    enforceUserPermission('module_support', 2);

    $contact_id = intval($_GET['contact_id']);
    $document_id = intval($_GET['document_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Contact Name for logging
    $contact_name = sanitizeInput(getFieldById('contacts', $contact_id, 'contact_name'));

    mysqli_query($mysqli,"DELETE FROM contact_documents WHERE contact_id = $contact_id AND document_id = $document_id");

    logAction("Document", "Unlink", "$session_name unlinked contact $contact_name from document $document_name", $client_id, $document_id);

    flash_alert("Contact <strong>$contact_name</strong> unlinked from Document <strong>$document_name</strong>", 'error');

    redirect();

}

if (isset($_POST['link_asset_to_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $asset_id = intval($_POST['asset_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Asset Name for logging
    $asset_name = sanitizeInput(getFieldById('assets', $asset_id, 'asset_name'));

    mysqli_query($mysqli,"INSERT INTO asset_documents SET asset_id = $asset_id, document_id = $document_id");

    logAction("Document", "Link", "$session_name linked asset $asset_name to document $document_name", $client_id, $document_id);

    flash_alert("Asset <strong>$asset_name</strong> linked with Document <strong>$document_name</strong>");

    redirect();

}

if (isset($_GET['unlink_asset_from_document'])) {

    enforceUserPermission('module_support', 2);

    $asset_id = intval($_GET['asset_id']);
    $document_id = intval($_GET['document_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Asset Name for logging
    $asset_name = sanitizeInput(getFieldById('assets', $asset_id, 'asset_name'));

    mysqli_query($mysqli,"DELETE FROM asset_documents WHERE asset_id = $asset_id AND document_id = $document_id");

    logAction("Document", "Unlink", "$session_name unlinked asset $asset_name from document $document_name", $client_id, $document_id);

    flash_alert("Asset <strong>$asset_name</strong> unlinked from Document <strong>$document_name</strong>", 'error');

    redirect();

}

if (isset($_POST['link_software_to_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $software_id = intval($_POST['software_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Software Name for logging
    $software_name = sanitizeInput(getFieldById('software', $software_id, 'software_name'));

    // Contact add query
    mysqli_query($mysqli,"INSERT INTO software_documents SET software_id = $software_id, document_id = $document_id");

    logAction("Document", "Link", "$session_name linked software $software_name to document $document_name", $client_id, $document_id);

    flash_alert("Software <strong>$software_name</strong> linked with Document <strong>$document_name</strong>");

    redirect();

}

if (isset($_GET['unlink_software_from_document'])) {

    enforceUserPermission('module_support', 2);

    $software_id = intval($_GET['software_id']);
    $document_id = intval($_GET['document_id']);

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    // Get Software Name for logging
    $software_name = sanitizeInput(getFieldById('software', $software_id, 'software_name'));

    mysqli_query($mysqli,"DELETE FROM software_documents WHERE software_id = $software_id AND document_id = $document_id");

    logAction("Document", "Unlink", "$session_name unlinked software $software_name from document $document_name", $client_id, $document_id);
    
    flash_alert("Software <strong>$software_name</strong> unlinked from Document <strong>$document_name</strong>", 'error');

    redirect();

}

if (isset($_POST['toggle_document_visibility'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_POST['document_id']);
    $document_visible = intval($_POST['document_visible']);

    if ($document_visible == 0) {
        $visable_wording = "Invisable";
    } else {
        $visable_wording = "Visable";
    }

    // Get Document Name and Client ID for logging
    $sql_document = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql_document);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    mysqli_query($mysqli,"UPDATE documents SET document_client_visible = $document_visible WHERE document_id = $document_id");

    logAction("Document", "Edit", "$session_name changed document $document_name visibilty to $visable_wording in the client portal", $client_id, $document_id);

    flash_alert("Document <strong>$document_name</strong> changed to <strong>$visable_wording</strong> in the client portal");

    redirect();

}

if (isset($_GET['export_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_GET['export_document']);

    // Get Contact Name and Client ID for logging and alert message
    $sql = mysqli_query($mysqli,"SELECT document_name, document_content, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql);
    $document_name = sanitizeInput($row['document_name']);
    $document_content = $row['document_content'];
    $client_id = intval($row['document_client_id']);

    // Include the TCPDF class
    require_once('../plugins/TCPDF/tcpdf.php');

    $pdf = new TCPDF();

    // Set document information
    $pdf->SetCreator(PDF_CREATOR);
    $pdf->SetAuthor("$document_name");
    $pdf->SetTitle("$document_name");

    // Add a page
    $pdf->AddPage();

    // Set font
    $pdf->SetFont('helvetica', '', 12);

    // Write HTML content to the PDF
    $pdf->writeHTML($document_content, true, false, true, false, '');

    // Output PDF to browser
    $pdf->Output("$document_name.pdf", 'I'); // 'I' for inline display, 'D' for download

    // Logging
    logAction("Document", "Export", "$session_name exported document $document_name", $client_id, $document_id);

    flash_alert("Document <strong>$document_name</strong> exported");

    redirect();

}

if (isset($_GET['archive_document'])) {

    enforceUserPermission('module_support', 2);

    $document_id = intval($_GET['archive_document']);

    // Get Contact Name and Client ID for logging and alert message
    $sql = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql);
    $document_name = sanitizeInput($row['document_name']);
    $client_id = intval($row['document_client_id']);

    mysqli_query($mysqli,"UPDATE documents SET document_archived_at = NOW() WHERE document_id = $document_id");

    // Remove Associations
    // File Association
    mysqli_query($mysqli,"DELETE FROM document_files WHERE document_id = $document_id");

    // Contact Associations
    mysqli_query($mysqli,"DELETE FROM contact_documents WHERE document_id = $document_id");

    // Asset Associations
    mysqli_query($mysqli,"DELETE FROM asset_documents WHERE document_id = $document_id");

    // Software Associations
    mysqli_query($mysqli,"DELETE FROM software_documents WHERE document_id = $document_id");

    // Vendor Associations
    mysqli_query($mysqli,"DELETE FROM vendor_documents WHERE document_id = $document_id");

    // Service Associations
    mysqli_query($mysqli,"DELETE FROM service_documents WHERE document_id = $document_id");

    logAction("Document", "Archive", "$session_name archived document $document_name", $client_id, $document_id);

    flash_alert("Document <strong>$document_name</strong> archived", 'error');

    redirect();

}

if (isset($_GET['delete_document_version'])) {

    enforceUserPermission('module_support', 3);

    $document_version_id = intval($_GET['delete_document_version']);

    // Get Document
    $sql = mysqli_query($mysqli,"SELECT document_version_name, document_client_id FROM documents, document_versions WHERE document_version_document_id = document_id AND document_version_id = $document_version_id");
    $row = mysqli_fetch_array($sql);
    $client_id = intval($row['document_client_id']);
    $document_version_name = sanitizeInput($row['document_version_name']);

    mysqli_query($mysqli,"DELETE FROM document_versions WHERE document_version_id = $document_version_id");

    logAction("Document Version", "Delete", "$session_name deleted document version $document_version_name", $client_id);

    flash_alert("Document $document_version_name version deleted", 'error');

    redirect();

}

if (isset($_GET['delete_document'])) {

    enforceUserPermission('module_support', 3);

    $document_id = intval($_GET['delete_document']);

    // Get Document Name and Client ID for logging
    $sql = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
    $row = mysqli_fetch_array($sql);
    $client_id = intval($row['document_client_id']);
    $document_name = sanitizeInput($row['document_name']);

    mysqli_query($mysqli,"DELETE FROM documents WHERE document_id = $document_id");

    // Delete all versions associated with the master document
    mysqli_query($mysqli,"DELETE FROM document_versions WHERE document_version_document_id = $document_id");

    logAction("Document", "Delete", "$session_name deleted document $document_name and all versions", $client_id);

    flash_alert("Document <strong>$document_name</strong> deleted and all versions", 'error');

    redirect();

}

if (isset($_POST['bulk_delete_documents'])) {

    validateCSRFToken($_POST['csrf_token']);

    enforceUserPermission('module_support', 3);
    
    if (isset($_POST['document_ids'])) {     

        // Get selected document count
        $count = count($_POST['document_ids']);
        
        // Delete document loop
        foreach($_POST['document_ids'] as $document_id) {
            $document_id = intval($document_id);
            // Get document name for logging
            $sql = mysqli_query($mysqli,"SELECT document_name, document_client_id FROM documents WHERE document_id = $document_id");
            $row = mysqli_fetch_array($sql);
            $document_name = sanitizeInput($row['document_name']);
            $client_id = intval($row['document_client_id']);

            mysqli_query($mysqli,"DELETE FROM documents WHERE document_id = $document_id");

            // Delete all versions associated with the master document
            mysqli_query($mysqli,"DELETE FROM document_versions WHERE document_version_document_id = $document_id");

            logAction("Document", "Delete", "$session_name deleted document $document_name and all versions", $client_id);  

        }

        logAction("Document", "Bulk Delete", "$session_name deleted $count document(s) and all versions", $client_id);

        flash_alert("Deleted <strong>$count</strong> Documents and associated document versions", 'error');
    
    }

    redirect();

}