(core) Customizable stripe plans.

Summary:
- Reading plans from Stripe, and allowing Stripe to define custom plans.
- Storing product features (aka limits) in Stripe, that override those in db.
- Adding hierarchical data in Stripe. All features are defined at Product level but can be overwritten on Price levels.
- New options for Support user to
-- Override product for team site (if he is added as a billing manager)
-- Override subscription and customer id for a team site
-- Attach an "offer", an custom plan configured in stripe that a team site can use
-- Enabling wire transfer for subscription by allowing subscription to be created without a payment method (which is customizable)

Test Plan: Updated and new.

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D4201

app/server/companion.ts

@@ -176,7 +176,7 @@ export function addSiteCommand(program: commander.Command,
       }, {
         setUserAsOwner: false,
         useNewPlan: true,
-        planType: 'teamFree'
+        product: 'teamFree'
       }));
     });
 }

app/server/lib/DocApi.ts

@@ -1893,7 +1893,7 @@ export class DocWorkerApi {
     // or to be wrongly rejected after upgrading.
     const doc = (req as RequestWithLogin).docAuth!.cachedDoc!;
 
-    const max = doc.workspace.org.billingAccount?.product.features.baseMaxApiUnitsPerDocumentPerDay;
+    const max = doc.workspace.org.billingAccount?.getFeatures().baseMaxApiUnitsPerDocumentPerDay;
     if (!max) {
       // This doc has no associated product (happens to new unsaved docs)
       // or the product has no API limit. Allow the request through.

app/server/lib/FlexServer.ts

@@ -1092,7 +1092,7 @@ export class FlexServer implements GristServer {
           // If "welcomeNewUser" is ever added to billing pages, we'd need
           // to avoid a redirect loop.
 
-          if (orgInfo.billingAccount.isManager && orgInfo.billingAccount.product.features.vanityDomain) {
+          if (orgInfo.billingAccount.isManager && orgInfo.billingAccount.getFeatures().vanityDomain) {
             const prefix = isOrgInPathOnly(req.hostname) ? `/o/${mreq.org}` : '';
             return res.redirect(`${prefix}/billing/payment?billingTask=signUpLite`);
           }

app/server/lib/HostedStorageManager.ts

@@ -175,8 +175,8 @@ export class HostedStorageManager implements IDocStorageManager {
           return path.join(dir, 'meta.json');
         },
         async docId => {
-          const product = await dbManager.getDocProduct(docId);
-          return product?.features.snapshotWindow;
+          const features = await dbManager.getDocFeatures(docId);
+          return features?.snapshotWindow;
         },
       );
 

app/server/lib/requestUtils.ts

@@ -22,7 +22,7 @@ export const TEST_HTTPS_OFFSET = process.env.GRIST_TEST_HTTPS_OFFSET ?
 // Database fields that we permit in entities but don't want to cross the api.
 const INTERNAL_FIELDS = new Set([
   'apiKey', 'billingAccountId', 'firstLoginAt', 'filteredOut', 'ownerId', 'gracePeriodStart', 'stripeCustomerId',
-  'stripeSubscriptionId', 'stripePlanId', 'stripeProductId', 'userId', 'isFirstTimeUser', 'allowGoogleLogin',
+  'stripeSubscriptionId', 'stripeProductId', 'userId', 'isFirstTimeUser', 'allowGoogleLogin',
   'authSubject', 'usage', 'createdBy'
 ]);