From 93d9b5425a87456b83c80d02f2d2887511076e69 Mon Sep 17 00:00:00 2001
From: Andre Staltz <andre@staltz.com>
Date: Fri, 14 Apr 2023 16:13:58 +0300
Subject: [PATCH] add Tangle.has

---
 lib/tangle.js       |  8 ++++++++
 test/tangle.test.js | 19 +++++++++++++++----
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/lib/tangle.js b/lib/tangle.js
index 3b97bd2..8db8ffb 100644
--- a/lib/tangle.js
+++ b/lib/tangle.js
@@ -129,6 +129,14 @@ class Tangle {
     return this.#getAllAtDepth(lipmaaDepth)
   }
 
+  /**
+   * @param {string} msgHash
+   * @returns {boolean}
+   */
+  has(msgHash) {
+    return this.#depth.has(msgHash)
+  }
+
   #shortestPathToRoot(msgHash) {
     const path = []
     let current = msgHash
diff --git a/test/tangle.test.js b/test/tangle.test.js
index c635e52..5892221 100644
--- a/test/tangle.test.js
+++ b/test/tangle.test.js
@@ -83,6 +83,19 @@ test('setup', async (t) => {
   reply3Hi = reply3B.localeCompare(reply3C) < 0 ? reply3C : reply3B
 })
 
+test('Tangle.has', (t) => {
+  const tangle = new Tangle(rootPost, peer.db.records())
+
+  t.true(tangle.has(rootPost), 'has rootPost')
+  t.true(tangle.has(reply1Lo), 'has reply1Lo')
+  t.true(tangle.has(reply1Hi), 'has reply1Hi')
+  t.true(tangle.has(reply2A), 'has reply2A')
+  t.true(tangle.has(reply3Lo), 'has reply3Lo')
+  t.true(tangle.has(reply3Hi), 'has reply3Hi')
+  t.false(tangle.has('nonsense'), 'does not have nonsense')
+  t.end()
+})
+
 test('Tangle.topoSort', (t) => {
   const tangle = new Tangle(rootPost, peer.db.records())
   const sorted = tangle.topoSort()
@@ -95,7 +108,6 @@ test('Tangle.topoSort', (t) => {
     reply3Lo,
     reply3Hi,
   ])
-  console.log(sorted);
   t.end()
 })
 
@@ -121,7 +133,7 @@ test('Tangle.getLipmaa', (t) => {
   t.end()
 })
 
-test('Tangle.getDeletablesAndEmptyables basic', t => {
+test('Tangle.getDeletablesAndEmptyables basic', (t) => {
   const tangle = new Tangle(rootPost, peer.db.records())
   const { deletables, emptyables } = tangle.getDeletablesAndEmptyables(reply2A)
 
@@ -130,8 +142,7 @@ test('Tangle.getDeletablesAndEmptyables basic', t => {
   t.end()
 })
 
-
-test('Tangle.getDeletablesAndEmptyables with lipmaa', t => {
+test('Tangle.getDeletablesAndEmptyables with lipmaa', (t) => {
   const tangle = new Tangle(rootPost, peer.db.records())
   const { deletables, emptyables } = tangle.getDeletablesAndEmptyables(reply3Lo)