add createDocument from template functionality

apps/OpenSignServer/cloud/parsefunction/GetTemplate.js

@@ -0,0 +1,46 @@
+export default async function GetTemplate(request) {
+  const serverUrl = process.env.SERVER_URL;
+  const templateId = request.params.templateId;
+
+  try {
+    const userRes = await axios.get(serverUrl + '/users/me', {
+      headers: {
+        'X-Parse-Application-Id': process.env.APP_ID,
+        'X-Parse-Session-Token': request.headers['sessiontoken'],
+      },
+    });
+    const userId = userRes.data && userRes.data.objectId;
+    if (templateId && userId) {
+      try {
+        const template = new Parse.Query('contracts_Template');
+        template.equalTo('objectId', templateId);
+        template.include('ExtUserPtr');
+        template.include('Signers');
+        template.include('CreateBy');
+        const res = template.first({ useMasterKey: true });
+        if (res) {
+          const acl = res.getACL();
+          if (acl && acl.getReadAccess(userId)) {
+            return res;
+          } else {
+            return { error: "You don't have access of this document!" };
+          }
+        } else {
+          return { error: "You don't have access of this document!" };
+        }
+      } catch (err) {
+        console.log('err', err);
+        return err;
+      }
+    } else {
+      return { error: 'Please pass required parameters!' };
+    }
+  } catch (err) {
+    console.log('err', err);
+    if (err.code == 209) {
+      return { error: 'Invalid session token' };
+    } else {
+      return { error: "You don't have access of this document!" };
+    }
+  }
+}