Add study user re-engagement reminder emails; v1.1.19

Sends 7/14/30-day inactivity emails to study users who haven't logged in, with one-click HMAC-signed unsubscribe and automatic re-arm on next login. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-28 15:56:09 -04:00
parent d0c949070f
commit 2732730f5e
6 changed files with 166 additions and 4 deletions
@@ -584,3 +584,61 @@ export async function sendStudyReminderEmail(email, displayName, studyTitle, sec
    console.error('[study-reminder] send exception:', err)
  }
 }
+
+const REENGAGEMENT_COPY = {
+  '7d': {
+    subject: 'Your study is waiting for you',
+    eyebrow: 'Come Back',
+    headline: 'Pick up where you left off',
+    body: "It's been a week — your progress is saved and your next lesson is ready whenever you are.",
+    cta: 'Continue Studying',
+  },
+  '14d': {
+    subject: "Don't lose your momentum",
+    eyebrow: 'Still With You',
+    headline: 'Your spot is still saved',
+    body: 'Two weeks have passed, but every note and completed lesson is still right there. A little each day adds up.',
+    cta: 'Return to Your Study',
+  },
+  '30d': {
+    subject: 'Your progress is still here',
+    eyebrow: 'We Saved Your Spot',
+    headline: "It's been a month — come back anytime",
+    body: 'Your study progress is still intact and waiting. There\'s no deadline — come back whenever you\'re ready.',
+    cta: 'Open Your Study',
+  },
+}
+
+export async function sendStudyReengagementEmail(email, displayName, studyTitle, studyUrl, tier, unsubUrl) {
+  if (!process.env.RESEND_API_KEY) return
+  const copy = REENGAGEMENT_COPY[tier]
+  if (!copy) return
+  try {
+    const resend = new Resend(process.env.RESEND_API_KEY)
+    const namePart = typeof displayName === 'string' && displayName.trim() ? displayName.trim() : 'friend'
+    const subject = `${copy.subject}${studyTitle ? ` — ${studyTitle}` : ''}`
+    const bodyHtml = (
+      `<p style="margin:0 0 16px;">Hi <strong style="color:#f0ead8;">${escapeHtml(namePart)}</strong>,</p>` +
+      `<p style="margin:0 0 16px;">${escapeHtml(copy.body)}${studyTitle ? ` Your current study: <strong style="color:#f0ead8;">${escapeHtml(studyTitle)}</strong>.` : ''}</p>`
+    )
+    const unsubLine = unsubUrl ? `<p style="margin:16px 0 0;font-size:11px;color:#7a7060;">Not interested? <a href="${escapeHtml(unsubUrl)}" style="color:#7a7060;">Unsubscribe from these reminders.</a></p>` : ''
+    const footerHtml = `<p style="margin:0;font-family:Georgia,serif;font-size:12px;font-weight:300;color:#7a7060;line-height:1.6;">Grace and peace,<br/>Verse by Verse with Nate</p>${unsubLine}`
+    const { error } = await resend.emails.send({
+      from: process.env.RESEND_FROM ?? DEFAULT_RESEND_FROM,
+      to: [email],
+      subject,
+      text: `Hi ${namePart},\n\n${copy.body}${studyTitle ? ` Your current study: ${studyTitle}.` : ''}\n\n${studyUrl}\n\nGrace and peace,\nVerse by Verse with Nate${unsubUrl ? `\n\nUnsubscribe: ${unsubUrl}` : ''}`,
+      html: buildBrandedEmailHtml({
+        title: copy.headline,
+        eyebrow: copy.eyebrow,
+        bodyHtml,
+        ctaLabel: copy.cta,
+        ctaUrl: studyUrl,
+        footerHtml,
+      }),
+    })
+    if (error) console.error('[study-reengagement] send error:', error)
+  } catch (err) {
+    console.error('[study-reengagement] send exception:', err)
+  }
+}