feat(server): supplement team email remind (#9483)

fix PD-2047 AF-1996

packages/backend/server/src/base/event/def.ts

@@ -17,6 +17,7 @@ export interface WorkspaceEvents {
     }>;
     ownerTransferred: Payload<{ email: string; workspaceId: Workspace['id'] }>;
     updated: Payload<{ workspaceId: Workspace['id']; count: number }>;
+    removed: Payload<{ workspaceId: Workspace['id']; userId: User['id'] }>;
   };
   deleted: Payload<Workspace['id']>;
   blob: {

packages/backend/server/src/base/mailer/mail.service.ts

@@ -276,7 +276,39 @@ export class MailService {
   }
 
   // =================== Team Workspace Mails ===================
-  async sendReviewRequestMail(
+  async sendTeamWorkspaceUpgradedEmail(
+    to: string,
+    ws: { id: string; name: string; isOwner: boolean }
+  ) {
+    const { id: workspaceId, name: workspaceName, isOwner } = ws;
+
+    const baseContent = {
+      subject: `${workspaceName} has been upgraded to team workspace! 🎉`,
+      title: 'Welcome to the team workspace!',
+      content: `Great news! ${workspaceName} has been upgraded to team workspace by the workspace owner. You now have access to the following enhanced features:`,
+    };
+    if (isOwner) {
+      baseContent.subject =
+        'Your workspace has been upgraded to team workspace! 🎉';
+      baseContent.title = 'Welcome to the team workspace!';
+      baseContent.content = `${workspaceName} has been upgraded to team workspace with the following benefits:`;
+    }
+
+    const html = emailTemplate({
+      title: baseContent.title,
+      content: `${baseContent.content}
+✓ 100 GB initial storage + 20 GB per seat
+✓ 500 MB of maximum file size
+✓ Unlimited team members (10+ seats)
+✓ Multiple admin roles
+✓ Priority customer support`,
+      buttonContent: 'Open Workspace',
+      buttonUrl: this.url.link(`/workspace/${workspaceId}`),
+    });
+    return this.sendMail({ to, subject: baseContent.subject, html });
+  }
+
+  async sendReviewRequestEmail(
     to: string,
     invitee: string,
     ws: { id: string; name: string }
@@ -324,7 +356,7 @@ export class MailService {
     return this.sendMail({ to, subject, html });
   }
 
-  async sendOwnerTransferred(to: string, ws: { name: string }) {
+  async sendOwnershipTransferredEmail(to: string, ws: { name: string }) {
     const { name: workspaceName } = ws;
     const title = `Your ownership of ${workspaceName} has been transferred`;
 
@@ -334,4 +366,83 @@ export class MailService {
     });
     return this.sendMail({ to, subject: title, html });
   }
+
+  async sendMemberRemovedEmail(to: string, ws: { name: string }) {
+    const { name: workspaceName } = ws;
+    const title = `You have been removed from ${workspaceName}`;
+
+    const html = emailTemplate({
+      title: 'Workspace access removed',
+      content: `You have been removed from {workspace name}. You no longer have access to this workspace.`,
+    });
+    return this.sendMail({ to, subject: title, html });
+  }
+
+  async sendWorkspaceExpireRemindEmail(
+    to: string,
+    ws: {
+      id: string;
+      name: string;
+      expirationDate: Date;
+      deletionDate?: Date;
+    }
+  ) {
+    const {
+      id: workspaceId,
+      name: workspaceName,
+      expirationDate,
+      deletionDate,
+    } = ws;
+    const baseContent: {
+      subject: string;
+      title: string;
+      content: string;
+      button?: { buttonContent: string; buttonUrl: string };
+    } = {
+      subject: `[Action Required] Your ${workspaceName} team workspace is expiring soon`,
+      title: 'Team workspace expiring soon',
+      content: `Your ${workspaceName} team workspace will expire on ${expirationDate}. After expiration, you won't be able to sync or collaborate with team members. Please renew your subscription to continue using all team features.`,
+      button: {
+        buttonContent: 'Go to Billing',
+        // TODO(@darkskygit): use real billing path
+        buttonUrl: this.url.link(`/workspace/${workspaceId}`),
+      },
+    };
+
+    if (deletionDate) {
+      if (deletionDate.getTime() > Date.now()) {
+        // in 24 hours
+        if (deletionDate.getTime() - Date.now() < 24 * 60 * 60 * 1000) {
+          baseContent.subject = `[Action Required] Final warning: Your ${workspaceName} data will be deleted in 24 hours`;
+          baseContent.title = 'Urgent: Last chance to prevent data loss';
+          baseContent.content = `Your ${workspaceName} team workspace data will be permanently deleted in 24 hours on ${deletionDate}. To prevent data loss, please take immediate action:
+<li>Renew your subscription to restore team features</li>
+<li>Export your workspace data from Workspace Settings > Export Workspace</li>`;
+        } else {
+          baseContent.subject = `[Action Required] Important: Your ${workspaceName} data will be deleted soon`;
+          baseContent.title = 'Take action to prevent data loss';
+          baseContent.content = `Your ${workspaceName} team workspace expired on ${expirationDate}. All workspace data will be permanently deleted on ${deletionDate} (180 days after expiration). To prevent data loss, please either:
+<li>Renew your subscription to restore team features</li>
+<li>Export your workspace data from Workspace Settings > Export Workspace</li>`;
+        }
+      } else {
+        baseContent.subject = `Data deletion completed for ${workspaceName}`;
+        baseContent.title = 'Workspace data deleted';
+        baseContent.content = `All data in ${workspaceName} has been permanently deleted as the workspace remained expired for 180 days. This action cannot be undone.
+Thank you for your support of AFFiNE. We hope to see you again in the future.`;
+        baseContent.button = undefined;
+      }
+    } else if (expirationDate.getTime() < Date.now()) {
+      baseContent.subject = `Your ${workspaceName} team workspace has expired`;
+      baseContent.title = 'Team workspace expired';
+      baseContent.content = `Your ${workspaceName} team workspace expired on ${expirationDate}. Your workspace can't sync or collaborate with team members. Please renew your subscription to restore all team features.`;
+    }
+
+    const html = emailTemplate({
+      title: baseContent.title,
+      content: baseContent.content,
+      ...baseContent.button,
+    });
+    return this.sendMail({ to, subject: baseContent.subject, html });
+  }
 }