From 5f3a1940e578ce61cce783591fed8ce0ba7cfe44 Mon Sep 17 00:00:00 2001
From: garrettmills <shout@garrettmills.dev>
Date: Sat, 10 Apr 2021 07:36:14 -0500
Subject: [PATCH] Add /api/v1/chain endpoint to read blockchain

---
 .../controllers/api/Blockchain.controller.ts  | 19 +++++++++++++++++--
 src/app/http/routes/app.routes.ts             |  2 ++
 src/app/units/Blockchain.ts                   |  7 +++++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/src/app/http/controllers/api/Blockchain.controller.ts b/src/app/http/controllers/api/Blockchain.controller.ts
index f3918b6..4f85729 100644
--- a/src/app/http/controllers/api/Blockchain.controller.ts
+++ b/src/app/http/controllers/api/Blockchain.controller.ts
@@ -1,7 +1,8 @@
 import {Controller} from "@extollo/lib"
-import {Injectable} from "@extollo/di"
+import {Injectable, Inject} from "@extollo/di"
 import {TransactionResource, TransactionResourceItem} from "../../../rtdb/TransactionResource"
-import {one} from "@extollo/util"
+import {many, one} from "@extollo/util"
+import {Blockchain as BlockchainService} from "../../../units/Blockchain"
 
 /**
  * Blockchain Controller
@@ -10,6 +11,20 @@ import {one} from "@extollo/util"
  */
 @Injectable()
 export class Blockchain extends Controller {
+    @Inject()
+    protected readonly blockchain!: BlockchainService
+
+    /**
+     * Read the version of the blockchain held by this host, as it currently exists.
+     */
+    public async readBlockchain() {
+        return many((await this.blockchain.read()).map(x => {
+            // @ts-ignore
+            delete x.firebaseID
+            return x
+        }))
+    }
+
     /**
      * Post a new transaction to the blockchain. This is only intended for testing.
      */
diff --git a/src/app/http/routes/app.routes.ts b/src/app/http/routes/app.routes.ts
index 963a3c6..57313bb 100644
--- a/src/app/http/routes/app.routes.ts
+++ b/src/app/http/routes/app.routes.ts
@@ -4,4 +4,6 @@ Route.group('/api/v1', () => {
     Route.post('/encounter', 'api:Blockchain.postTransaction')
         .pre('DebugOnly')
         .pre('api:ValidateEncounterTransaction')
+
+    Route.get('/chain', 'api:Blockchain.readBlockchain')
 })
diff --git a/src/app/units/Blockchain.ts b/src/app/units/Blockchain.ts
index 6eb8665..b2ecfbd 100644
--- a/src/app/units/Blockchain.ts
+++ b/src/app/units/Blockchain.ts
@@ -213,6 +213,13 @@ export class Blockchain extends Unit {
         return new Block(genesis)
     }
 
+    /**
+     * Get a list of all blocks in the chain, in order.
+     */
+    public async read(): Promise<BlockResourceItem[]> {
+        return BlockResource.collect().all()
+    }
+
     /**
      * Given a client-submitted transaction, generate a block encounter transaction record.
      * @param item