From 0c0cb2cec9272c76278aa8111defbc0f43c84574 Mon Sep 17 00:00:00 2001
From: johnnyq <johnny@pittpc.com>
Date: Tue, 19 Sep 2023 15:55:35 -0400
Subject: [PATCH] Added UI support for linking assets, contacts, and licenses
 to Documents

---
 client_document_details.php                   | 120 +++++++++++++----
 client_document_link_asset_modal.php          |  58 +++++++++
 client_document_link_contact_modal.php        |  58 +++++++++
 ...php => client_document_link_file_modal.php |   6 +-
 client_document_link_software_modal.php       |  58 +++++++++
 ...p => client_document_link_vendor_modal.php |   6 +-
 post/document.php                             | 123 +++++++++++++++++-
 7 files changed, 393 insertions(+), 36 deletions(-)
 create mode 100644 client_document_link_asset_modal.php
 create mode 100644 client_document_link_contact_modal.php
 rename client_document_associate_file_modal.php => client_document_link_file_modal.php (88%)
 create mode 100644 client_document_link_software_modal.php
 rename client_document_associate_vendor_modal.php => client_document_link_vendor_modal.php (90%)

diff --git a/client_document_details.php b/client_document_details.php
index 592cc223..9c1dff29 100644
--- a/client_document_details.php
+++ b/client_document_details.php
@@ -61,39 +61,108 @@ $document_folder_id = intval($row['document_folder_id']);
         <button type="button" class="btn btn-secondary btn-block" onclick="window.print();"><i class="fas fa-fw fa-print mr-2"></i>Print</button>
         <hr>
         <h5>Related</h5>
-        <h6>
-          <i class="fas fa-fw fa-paperclip text-secondary mr-2"></i>Files
-          <button type="button" class="btn btn-link btn-sm" data-toggle="modal" data-target="#associateFileToDocumentModal">
-            <i class="fas fa-fw fa-plus"></i>
-          </button>
-        </h6>
-        <h6>
-          <i class="fas fa-fw fa-key text-secondary mr-2"></i>Passwords
-          <button type="button" class="btn btn-link btn-sm">
-            <i class="fas fa-fw fa-plus"></i>
-          </button>
-        </h6>
         <h6>
           <i class="fas fa-fw fa-users text-secondary mr-2"></i>Contacts
-          <button type="button" class="btn btn-link btn-sm">
+          <button type="button" class="btn btn-link btn-sm" data-toggle="modal" data-target="#linkContactToDocumentModal">
             <i class="fas fa-fw fa-plus"></i>
           </button>
         </h6>
+        <ul>
+          <?php
+          $sql_contacts = mysqli_query($mysqli, "SELECT * FROM contacts, contact_documents
+            WHERE contacts.contact_id = contact_documents.contact_id 
+            AND contact_documents.document_id = $document_id
+            ORDER BY contact_name ASC"
+          );
+          
+          $linked_contacts = array();
+
+          while ($row = mysqli_fetch_array($sql_contacts)) {
+            $contact_id = intval($row['contact_id']);
+            $contact_name = nullable_htmlentities($row['contact_name']);
+
+            $linked_contacts[] = $contact_id;
+
+            ?>
+            <li>
+              <?php echo $contact_name; ?> 
+              <a href="post.php?unlink_contact_from_document&contact_id=<?php echo $contact_id; ?>&document_id=<?php echo $document_id; ?>">
+                <i class="fas fa-fw fa-times text-secondary ml-2"></i>
+              </a>
+            </li>
+            <?php
+            }
+            ?>
+        </ul>
         <h6>
           <i class="fas fa-fw fa-laptop text-secondary mr-2"></i>Assets
-          <button type="button" class="btn btn-link btn-sm">
+          <button type="button" class="btn btn-link btn-sm" data-toggle="modal" data-target="#linkAssetToDocumentModal">
             <i class="fas fa-fw fa-plus"></i>
           </button>
         </h6>
+        <ul>
+          <?php
+          $sql_assets = mysqli_query($mysqli, "SELECT * FROM assets, asset_documents
+            WHERE assets.asset_id = asset_documents.asset_id 
+            AND asset_documents.document_id = $document_id
+            ORDER BY asset_name ASC"
+          );
+          
+          $linked_assets = array();
+
+          while ($row = mysqli_fetch_array($sql_assets)) {
+            $asset_id = intval($row['asset_id']);
+            $asset_name = nullable_htmlentities($row['asset_name']);
+
+            $linked_assets[] = $asset_id;
+
+            ?>
+            <li>
+              <?php echo $asset_name; ?> 
+              <a href="post.php?unlink_asset_from_document&asset_id=<?php echo $asset_id; ?>&document_id=<?php echo $document_id; ?>">
+                <i class="fas fa-fw fa-times text-secondary ml-2"></i>
+              </a>
+            </li>
+            <?php
+            }
+            ?>
+        </ul>
         <h6>
-          <i class="fas fa-fw fa-cube text-secondary mr-2"></i>Software
-          <button type="button" class="btn btn-link btn-sm">
+          <i class="fas fa-fw fa-cube text-secondary mr-2"></i>Licenses
+          <button type="button" class="btn btn-link btn-sm" data-toggle="modal" data-target="#linkSoftwareToDocumentModal">
             <i class="fas fa-fw fa-plus"></i>
           </button>
         </h6>
+        <ul>
+          <?php
+          $sql_software = mysqli_query($mysqli, "SELECT * FROM software, software_documents
+            WHERE software.software_id = software_documents.software_id 
+            AND software_documents.document_id = $document_id
+            ORDER BY software_name ASC"
+          );
+          
+          $linked_software = array();
+
+          while ($row = mysqli_fetch_array($sql_software)) {
+            $software_id = intval($row['software_id']);
+            $software_name = nullable_htmlentities($row['software_name']);
+
+            $linked_software[] = $software_id;
+
+            ?>
+            <li>
+              <?php echo $software_name; ?> 
+              <a href="post.php?unlink_software_from_document&software_id=<?php echo $software_id; ?>&document_id=<?php echo $document_id; ?>">
+                <i class="fas fa-fw fa-times text-secondary ml-2"></i>
+              </a>
+            </li>
+            <?php
+            }
+            ?>
+        </ul>
         <h6>
           <i class="fas fa-fw fa-building text-secondary mr-2"></i>Vendors
-          <button type="button" class="btn btn-link btn-sm" data-toggle="modal" data-target="#associateVendorToDocumentModal">
+          <button type="button" class="btn btn-link btn-sm" data-toggle="modal" data-target="#linkVendorToDocumentModal">
             <i class="fas fa-fw fa-plus"></i>
           </button>
         </h6>
@@ -116,14 +185,14 @@ $document_folder_id = intval($row['document_folder_id']);
             ?>
             <li>
               <?php echo $vendor_name; ?> 
-              <a href="post.php?unassociate_vendor_from_document&vendor_id=<?php echo $vendor_id; ?>&document_id=<?php echo $document_id; ?>">
+              <a href="post.php?unlink_vendor_from_document&vendor_id=<?php echo $vendor_id; ?>&document_id=<?php echo $document_id; ?>">
                 <i class="fas fa-fw fa-times text-secondary ml-2"></i>
               </a>
             </li>
-          <?php
-          }
-          ?>
-      </ul>
+            <?php
+            }
+            ?>
+        </ul>
       </div>
     </div>
 
@@ -134,8 +203,11 @@ $document_folder_id = intval($row['document_folder_id']);
 <?php
 
 require_once("client_document_edit_modal.php");
-require_once("client_document_associate_file_modal.php");
-require_once("client_document_associate_vendor_modal.php");
+require_once("client_document_link_file_modal.php");
+require_once("client_document_link_contact_modal.php");
+require_once("client_document_link_asset_modal.php");
+require_once("client_document_link_software_modal.php");
+require_once("client_document_link_vendor_modal.php");
 require_once("share_modal.php");
 require_once("footer.php");
 
diff --git a/client_document_link_asset_modal.php b/client_document_link_asset_modal.php
new file mode 100644
index 00000000..6d2e5f46
--- /dev/null
+++ b/client_document_link_asset_modal.php
@@ -0,0 +1,58 @@
+<div class="modal" id="linkAssetToDocumentModal" tabindex="-1">
+    <div class="modal-dialog">
+        <div class="modal-content bg-dark">
+            <div class="modal-header">
+                <h5 class="modal-title"><i class="fa fa-fw fa-desktop mr-2"></i>Link Asset to <strong><?php echo $document_name; ?></strong></h5>
+                <button type="button" class="close text-white" data-dismiss="modal">
+                    <span>&times;</span>
+                </button>
+            </div>
+            <form action="post.php" method="post" autocomplete="off">
+                <input type="hidden" name="client_id" value="<?php echo $client_id; ?>">
+                <input type="hidden" name="document_id" value="<?php echo $document_id; ?>">
+                <div class="modal-body bg-white">
+
+                    <div class="form-group">
+                        <div class="input-group">
+                            <div class="input-group-prepend">
+                                <span class="input-group-text"><i class="fa fa-fw fa-desktop"></i></span>
+                            </div>
+                            <select class="form-control select2" name="asset_id">
+                                <option value="">- Select an Asset -</option>
+                                <?php
+                                // Check if there are any associated vendors
+                                if (!empty($linked_assets)) {
+                                    $excluded_asset_ids = implode(",", $linked_assets);
+                                    $exclude_condition = "AND asset_id NOT IN ($excluded_asset_ids)";
+                                } else {
+                                    $exclude_condition = "";  // No condition if there are no displayed vendors
+                                }
+
+                                $sql_assets_select = mysqli_query($mysqli, "SELECT * FROM assets
+                                    WHERE asset_client_id = $client_id 
+                                    AND asset_archived_at IS NULL
+                                    $exclude_condition
+                                    ORDER BY asset_name ASC"
+                                );
+                                while ($row = mysqli_fetch_array($sql_assets_select)) {
+                                    $asset_id = intval($row['asset_id']);
+                                    $asset_name = nullable_htmlentities($row['asset_name']);
+
+                                    ?>
+                                    <option value="<?php echo $asset_id ?>"><?php echo $asset_name; ?></option>
+                                    <?php
+                                }
+                                ?>
+
+                            </select>
+                        </div>
+                    </div>
+                </div>
+                <div class="modal-footer bg-white">
+                    <button type="submit" name="link_asset_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Link</button>
+                    <button type="button" class="btn btn-light" data-dismiss="modal"><i class="fa fa-times mr-2"></i>Cancel</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
diff --git a/client_document_link_contact_modal.php b/client_document_link_contact_modal.php
new file mode 100644
index 00000000..201d1190
--- /dev/null
+++ b/client_document_link_contact_modal.php
@@ -0,0 +1,58 @@
+<div class="modal" id="linkContactToDocumentModal" tabindex="-1">
+    <div class="modal-dialog">
+        <div class="modal-content bg-dark">
+            <div class="modal-header">
+                <h5 class="modal-title"><i class="fa fa-fw fa-user mr-2"></i>Link Contact to <strong><?php echo $document_name; ?></strong></h5>
+                <button type="button" class="close text-white" data-dismiss="modal">
+                    <span>&times;</span>
+                </button>
+            </div>
+            <form action="post.php" method="post" autocomplete="off">
+                <input type="hidden" name="client_id" value="<?php echo $client_id; ?>">
+                <input type="hidden" name="document_id" value="<?php echo $document_id; ?>">
+                <div class="modal-body bg-white">
+
+                    <div class="form-group">
+                        <div class="input-group">
+                            <div class="input-group-prepend">
+                                <span class="input-group-text"><i class="fa fa-fw fa-user"></i></span>
+                            </div>
+                            <select class="form-control select2" name="contact_id">
+                                <option value="">- Select a Contact -</option>
+                                <?php
+                                // Check if there are any associated vendors
+                                if (!empty($linked_contacts)) {
+                                    $excluded_contact_ids = implode(",", $linked_contacts);
+                                    $exclude_condition = "AND contact_id NOT IN ($excluded_contact_ids)";
+                                } else {
+                                    $exclude_condition = "";  // No condition if there are no displayed vendors
+                                }
+
+                                $sql_contacts_select = mysqli_query($mysqli, "SELECT * FROM contacts
+                                    WHERE contact_client_id = $client_id 
+                                    AND contact_archived_at IS NULL
+                                    $exclude_condition
+                                    ORDER BY contact_name ASC"
+                                );
+                                while ($row = mysqli_fetch_array($sql_contacts_select)) {
+                                    $contact_id = intval($row['contact_id']);
+                                    $contact_name = nullable_htmlentities($row['contact_name']);
+
+                                    ?>
+                                    <option value="<?php echo $contact_id ?>"><?php echo $contact_name; ?></option>
+                                    <?php
+                                }
+                                ?>
+
+                            </select>
+                        </div>
+                    </div>
+                </div>
+                <div class="modal-footer bg-white">
+                    <button type="submit" name="link_contact_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Link</button>
+                    <button type="button" class="btn btn-light" data-dismiss="modal"><i class="fa fa-times mr-2"></i>Cancel</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
diff --git a/client_document_associate_file_modal.php b/client_document_link_file_modal.php
similarity index 88%
rename from client_document_associate_file_modal.php
rename to client_document_link_file_modal.php
index 37a7b13f..400c26ca 100644
--- a/client_document_associate_file_modal.php
+++ b/client_document_link_file_modal.php
@@ -1,8 +1,8 @@
-<div class="modal" id="associateFileToDocumentModal" tabindex="-1">
+<div class="modal" id="linkFileToDocumentModal" tabindex="-1">
     <div class="modal-dialog">
         <div class="modal-content bg-dark">
             <div class="modal-header">
-                <h5 class="modal-title"><i class="fa fa-fw fa-paperclip mr-2"></i>Associate File to <strong><?php echo $document_name; ?></strong></h5>
+                <h5 class="modal-title"><i class="fa fa-fw fa-paperclip mr-2"></i>Link File to <strong><?php echo $document_name; ?></strong></h5>
                 <button type="button" class="close text-white" data-dismiss="modal">
                     <span>&times;</span>
                 </button>
@@ -39,7 +39,7 @@
                     </div>
                 </div>
                 <div class="modal-footer bg-white">
-                    <button type="submit" name="associate_file_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Associate</button>
+                    <button type="submit" name="link_file_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Link</button>
                     <button type="button" class="btn btn-light" data-dismiss="modal"><i class="fa fa-times mr-2"></i>Cancel</button>
                 </div>
             </form>
diff --git a/client_document_link_software_modal.php b/client_document_link_software_modal.php
new file mode 100644
index 00000000..906773e2
--- /dev/null
+++ b/client_document_link_software_modal.php
@@ -0,0 +1,58 @@
+<div class="modal" id="linkSoftwareToDocumentModal" tabindex="-1">
+    <div class="modal-dialog">
+        <div class="modal-content bg-dark">
+            <div class="modal-header">
+                <h5 class="modal-title"><i class="fa fa-fw fa-user mr-2"></i>Link Software to <strong><?php echo $document_name; ?></strong></h5>
+                <button type="button" class="close text-white" data-dismiss="modal">
+                    <span>&times;</span>
+                </button>
+            </div>
+            <form action="post.php" method="post" autocomplete="off">
+                <input type="hidden" name="client_id" value="<?php echo $client_id; ?>">
+                <input type="hidden" name="document_id" value="<?php echo $document_id; ?>">
+                <div class="modal-body bg-white">
+
+                    <div class="form-group">
+                        <div class="input-group">
+                            <div class="input-group-prepend">
+                                <span class="input-group-text"><i class="fa fa-fw fa-box-open"></i></span>
+                            </div>
+                            <select class="form-control select2" name="software_id">
+                                <option value="">- Select a License -</option>
+                                <?php
+                                // Check if there are any associated vendors
+                                if (!empty($linked_software)) {
+                                    $excluded_software_ids = implode(",", $linked_software);
+                                    $exclude_condition = "AND software_id NOT IN ($excluded_software_ids)";
+                                } else {
+                                    $exclude_condition = "";  // No condition if there are no displayed vendors
+                                }
+
+                                $sql_software_select = mysqli_query($mysqli, "SELECT * FROM software
+                                    WHERE software_client_id = $client_id 
+                                    AND software_archived_at IS NULL
+                                    $exclude_condition
+                                    ORDER BY software_name ASC"
+                                );
+                                while ($row = mysqli_fetch_array($sql_software_select)) {
+                                    $software_id = intval($row['software_id']);
+                                    $software_name = nullable_htmlentities($row['software_name']);
+
+                                    ?>
+                                    <option value="<?php echo $software_id ?>"><?php echo $software_name; ?></option>
+                                    <?php
+                                }
+                                ?>
+
+                            </select>
+                        </div>
+                    </div>
+                </div>
+                <div class="modal-footer bg-white">
+                    <button type="submit" name="link_software_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Link</button>
+                    <button type="button" class="btn btn-light" data-dismiss="modal"><i class="fa fa-times mr-2"></i>Cancel</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
diff --git a/client_document_associate_vendor_modal.php b/client_document_link_vendor_modal.php
similarity index 90%
rename from client_document_associate_vendor_modal.php
rename to client_document_link_vendor_modal.php
index 56aa2cb7..2d0e108d 100644
--- a/client_document_associate_vendor_modal.php
+++ b/client_document_link_vendor_modal.php
@@ -1,8 +1,8 @@
-<div class="modal" id="associateVendorToDocumentModal" tabindex="-1">
+<div class="modal" id="linkVendorToDocumentModal" tabindex="-1">
     <div class="modal-dialog">
         <div class="modal-content bg-dark">
             <div class="modal-header">
-                <h5 class="modal-title"><i class="fa fa-fw fa-building mr-2"></i>Associate Vendor to <strong><?php echo $document_name; ?></strong></h5>
+                <h5 class="modal-title"><i class="fa fa-fw fa-building mr-2"></i>Link Vendor to <strong><?php echo $document_name; ?></strong></h5>
                 <button type="button" class="close text-white" data-dismiss="modal">
                     <span>&times;</span>
                 </button>
@@ -49,7 +49,7 @@
                     </div>
                 </div>
                 <div class="modal-footer bg-white">
-                    <button type="submit" name="associate_vendor_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Associate</button>
+                    <button type="submit" name="link_vendor_to_document" class="btn btn-primary text-bold"><i class="fa fa-check mr-2"></i>Link</button>
                     <button type="button" class="btn btn-light" data-dismiss="modal"><i class="fa fa-times mr-2"></i>Cancel</button>
                 </div>
             </form>
diff --git a/post/document.php b/post/document.php
index 02f56d5f..4c89e6a3 100644
--- a/post/document.php
+++ b/post/document.php
@@ -132,7 +132,7 @@ if (isset($_POST['move_document'])) {
 
 }
 
-if (isset($_POST['associate_vendor_to_document'])) {
+if (isset($_POST['link_vendor_to_document'])) {
 
     validateTechRole();
 
@@ -144,15 +144,15 @@ if (isset($_POST['associate_vendor_to_document'])) {
     mysqli_query($mysqli,"INSERT INTO vendor_documents SET vendor_id = $vendor_id, document_id = $document_id");
 
     // Logging
-    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'Create', log_description = 'Created Document Vendor Relation', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_client_id = $client_id, log_user_id = $session_user_id");
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'Link', log_description = 'Created Document Vendor link', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_client_id = $client_id, log_user_id = $session_user_id");
 
-    $_SESSION['alert_message'] = "Vendor associated with Document";
+    $_SESSION['alert_message'] = "Vendor linked with Document";
 
     header("Location: " . $_SERVER["HTTP_REFERER"]);
 
 }
 
-if (isset($_GET['unassociate_vendor_from_document'])) {
+if (isset($_GET['unlink_vendor_from_document'])) {
 
     validateTechRole();
     $vendor_id = intval($_GET['vendor_id']);
@@ -161,9 +161,120 @@ if (isset($_GET['unassociate_vendor_from_document'])) {
     mysqli_query($mysqli,"DELETE FROM vendor_documents WHERE vendor_id = $vendor_id AND document_id = $document_id");
 
     //Logging
-    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'Delete', log_description = 'Document Vendor relationship removed', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_user_id = $session_user_id");
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'unLink', log_description = 'Document Vendor link removed', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_user_id = $session_user_id");
 
-    $_SESSION['alert_message'] = "Vendor has been unassciated";
+    $_SESSION['alert_message'] = "Vendor has been unlinked";
+
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+
+}
+
+if (isset($_POST['link_contact_to_document'])) {
+
+    validateTechRole();
+
+    $client_id = intval($_POST['client_id']);
+    $document_id = intval($_POST['document_id']);
+    $contact_id = intval($_POST['contact_id']);
+
+    // Contact add query
+    mysqli_query($mysqli,"INSERT INTO contact_documents SET contact_id = $contact_id, document_id = $document_id");
+
+    // Logging
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'Link', log_description = 'Created Document Contact link', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_client_id = $client_id, log_user_id = $session_user_id");
+
+    $_SESSION['alert_message'] = "Contact linked with Document";
+
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+
+}
+
+if (isset($_GET['unlink_contact_from_document'])) {
+
+    validateTechRole();
+    $contact_id = intval($_GET['contact_id']);
+    $document_id = intval($_GET['document_id']);
+
+    mysqli_query($mysqli,"DELETE FROM contact_documents WHERE contact_id = $contact_id AND document_id = $document_id");
+
+    //Logging
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'unLink', log_description = 'Document Contact link removed', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_user_id = $session_user_id");
+
+    $_SESSION['alert_message'] = "Contact has been unlinked";
+
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+
+}
+
+if (isset($_POST['link_asset_to_document'])) {
+
+    validateTechRole();
+
+    $client_id = intval($_POST['client_id']);
+    $document_id = intval($_POST['document_id']);
+    $asset_id = intval($_POST['asset_id']);
+
+    // Contact add query
+    mysqli_query($mysqli,"INSERT INTO asset_documents SET asset_id = $asset_id, document_id = $document_id");
+
+    // Logging
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'Link', log_description = 'Created Document Asset link', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_client_id = $client_id, log_user_id = $session_user_id");
+
+    $_SESSION['alert_message'] = "Asset linked with Document";
+
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+
+}
+
+if (isset($_GET['unlink_asset_from_document'])) {
+
+    validateTechRole();
+    $asset_id = intval($_GET['asset_id']);
+    $document_id = intval($_GET['document_id']);
+
+    mysqli_query($mysqli,"DELETE FROM asset_documents WHERE asset_id = $asset_id AND document_id = $document_id");
+
+    //Logging
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'unLink', log_description = 'Document Asset link removed', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_user_id = $session_user_id");
+
+    $_SESSION['alert_message'] = "Asset has been unlinked";
+
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+
+}
+
+if (isset($_POST['link_software_to_document'])) {
+
+    validateTechRole();
+
+    $client_id = intval($_POST['client_id']);
+    $document_id = intval($_POST['document_id']);
+    $software_id = intval($_POST['software_id']);
+
+    // Contact add query
+    mysqli_query($mysqli,"INSERT INTO software_documents SET software_id = $software_id, document_id = $document_id");
+
+    // Logging
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'Link', log_description = 'Created Document Software link', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_client_id = $client_id, log_user_id = $session_user_id");
+
+    $_SESSION['alert_message'] = "Contact linked with Document";
+
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+
+}
+
+if (isset($_GET['unlink_software_from_document'])) {
+
+    validateTechRole();
+    $software_id = intval($_GET['software_id']);
+    $document_id = intval($_GET['document_id']);
+
+    mysqli_query($mysqli,"DELETE FROM software_documents WHERE software_id = $software_id AND document_id = $document_id");
+
+    //Logging
+    mysqli_query($mysqli,"INSERT INTO logs SET log_type = 'Document', log_action = 'unLink', log_description = 'Document Software link removed', log_ip = '$session_ip', log_user_agent = '$session_user_agent', log_user_id = $session_user_id");
+
+    $_SESSION['alert_message'] = "Software has been unlinked";
 
     header("Location: " . $_SERVER["HTTP_REFERER"]);