From 6b6e7ce24010672cb6d71260b6cab522b051f8eb Mon Sep 17 00:00:00 2001
From: Daniel Lugo <danlugo92@gmail.com>
Date: Fri, 24 Jan 2020 19:50:31 -0400
Subject: [PATCH] seed backup event

---
 services/gunDB/Mediator/index.js     | 27 +++++++++++++++++++++++++++
 services/gunDB/contact-api/events.js | 28 +++++++++++++++++++++++++++-
 services/gunDB/event-constants.js    |  3 ++-
 3 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/services/gunDB/Mediator/index.js b/services/gunDB/Mediator/index.js
index 32ac03d5..2d765d67 100644
--- a/services/gunDB/Mediator/index.js
+++ b/services/gunDB/Mediator/index.js
@@ -309,6 +309,7 @@ class Mediator {
     socket.on(Event.ON_RECEIVED_REQUESTS, this.onReceivedRequests)
     socket.on(Event.ON_SENT_REQUESTS, this.onSentRequests)
     socket.on(Event.ON_BIO, this.onBio)
+    socket.on(Event.ON_SEED_BACKUP, this.onSeedBackup)
 
     socket.on(IS_GUN_AUTH, this.isGunAuth)
   }
@@ -943,6 +944,32 @@ class Mediator {
       })
     }
   }
+
+  /**
+   * @param {Readonly<{ token: string }>} body
+   */
+  onSeedBackup = async body => {
+    try {
+      const { token } = body
+
+      await throwOnInvalidToken(token)
+
+      API.Events.onSeedBackup(seedBackup => {
+        this.socket.emit(Event.ON_SEED_BACKUP, {
+          ok: true,
+          msg: seedBackup,
+          origBody: body
+        })
+      }, user)
+    } catch (err) {
+      console.log(err)
+      this.socket.emit(Event.ON_SEED_BACKUP, {
+        ok: false,
+        msg: err.message,
+        origBody: body
+      })
+    }
+  }
 }
 
 /**
diff --git a/services/gunDB/contact-api/events.js b/services/gunDB/contact-api/events.js
index 6b5540ee..3c25ae60 100644
--- a/services/gunDB/contact-api/events.js
+++ b/services/gunDB/contact-api/events.js
@@ -1230,6 +1230,31 @@ const onBio = (cb, user) => {
   })
 }
 
+/** @type {string|null} */
+let currentSeedBackup = null
+
+/**
+ * @param {(seedBackup: string|null) => void} cb
+ * @param {UserGUNNode} user
+ * @throws {Error} If user hasn't been auth.
+ * @returns {void}
+ */
+const onSeedBackup = (cb, user) => {
+  if (!user.is) {
+    throw new Error(ErrorCode.NOT_AUTH)
+  }
+
+  const callb = debounce(cb, DEBOUNCE_WAIT_TIME)
+  callb(currentSeedBackup)
+
+  user.get(Key.SEED_BACKUP).on(seedBackup => {
+    if (typeof seedBackup === 'string' || seedBackup === null) {
+      currentSeedBackup = seedBackup
+      callb(seedBackup)
+    }
+  })
+}
+
 module.exports = {
   __onSentRequestToUser,
   __onUserToIncoming,
@@ -1242,5 +1267,6 @@ module.exports = {
   onChats,
   onSimplerReceivedRequests,
   onSimplerSentRequests,
-  onBio
+  onBio,
+  onSeedBackup
 }
diff --git a/services/gunDB/event-constants.js b/services/gunDB/event-constants.js
index 0c9c578f..c4ffdae4 100644
--- a/services/gunDB/event-constants.js
+++ b/services/gunDB/event-constants.js
@@ -6,7 +6,8 @@ const Events = {
   ON_HANDSHAKE_ADDRESS: "ON_HANDSHAKE_ADDRESS",
   ON_RECEIVED_REQUESTS: "ON_RECEIVED_REQUESTS",
   ON_SENT_REQUESTS: "ON_SENT_REQUESTS",
-  ON_BIO: "ON_BIO"
+  ON_BIO: "ON_BIO",
+  ON_SEED_BACKUP: "ON_SEED_BACKUP",
 };
 
 module.exports = Events;