From 7b5bfa4fe1b60ab914317d9870e242011753d848 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rn-Michael=20Miehe?= <jmm@yavook.de>
Date: Tue, 28 May 2019 17:42:21 +0200
Subject: [PATCH] game and session keys

---
 backend/session.coffee | 94 +++++++++++++++++++++++++++++++++++-------
 1 file changed, 78 insertions(+), 16 deletions(-)

diff --git a/backend/session.coffee b/backend/session.coffee
index f315f27..e8f3590 100644
--- a/backend/session.coffee
+++ b/backend/session.coffee
@@ -20,17 +20,19 @@ class FFTCGSESSION
     @db.on 'error', (err) =>
       logger.error err.message
 
-  start: (data) ->
-    new Promise (resolve) =>
-      # hash data
-      hmac = crypto.createHmac 'sha256', Math.random().toString()
-      hmac.update (JSON.stringify data)
-      digest = hmac.digest 'base64'
-      logger.debug 'digest', digest
+  sessionKey: (digest) -> "session.#{digest}"
+  gameKey: (digest) -> "game.#{digest}"
 
-      # push (hash, data) into DB for the configured timespan
-      @db.setex digest, EXPIRY.login * 86400, (JSON.stringify data), (err) ->
-        logger.info "OK '#{digest}' created"
+  start: (userid) ->
+    new Promise (resolve) =>
+      # hash userid
+      hmac = crypto.createHmac 'sha256', Math.random().toString()
+      hmac.update userid.toString()
+      digest = hmac.digest 'base64'
+
+      # push (hash, userid) into DB for the configured timespan
+      @db.setex (@sessionKey digest), EXPIRY.login * 86400, userid, =>
+        logger.info "OK '#{@sessionKey digest}' created"
         # return cookie data
         resolve
           value:  digest
@@ -40,23 +42,83 @@ class FFTCGSESSION
   destroy: (digest) ->
     new Promise (resolve, reject) =>
       # delete hash immediately
-      @db.del digest, (err, res) ->
+      @db.del (@sessionKey digest), (err, res) =>
         if res == 0
           reject null
         else
-          logger.info "OK '#{digest}' deleted"
+          logger.info "OK '#{@sessionKey digest}' deleted"
           resolve null
 
   check: (digest) ->
     new Promise (resolve, reject) =>
       # refresh expiry timer on digest
-      @db.expire digest, EXPIRY.login * 86400, (err, res) =>
+      @db.expire (@sessionKey digest), EXPIRY.login * 86400, (err, res) =>
         if res == 0
           reject null
 
         else
-          @db.get digest, (err, res) ->
-            logger.debug "OK '#{digest}' resumed"
-            resolve (JSON.parse res)
+          @db.get (@sessionKey digest), (err, res) =>
+            logger.debug "OK '#{@sessionKey digest}' resumed"
+            resolve res
+
+  newGame: (userid) ->
+    new Promise (resolve, reject) =>
+      # generate hash
+      hmac = crypto.createHmac 'sha256', Math.random().toString()
+      hmac.update userid.toString()
+      digest = hmac.digest 'base64'
+
+      # insert game key
+      @db.hsetnx (@gameKey digest), 'owner', userid, (err, res) =>
+        if res == 0
+          @db.del (@gameKey digest)
+          reject null
+
+        else
+          @db.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
+            if res == 0
+              @db.del (@gameKey digest)
+              reject null
+
+            else
+              # return game ID
+              logger.info "OK '#{@gameKey digest}' created"
+              resolve digest
+
+  joinGame: (digest, userid) ->
+    new Promise (resolve, reject) =>
+      # refresh expiry timer on digest
+      @db.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
+        if res == 0
+          reject null
+
+        else
+          # insert opponent value
+          @db.hsetnx (@gameKey digest), 'opponent', userid, (err, res) =>
+            if res == 0
+              reject null
+
+            else
+              # return game ID
+              logger.info "OK '#{@gameKey digest}' joined"
+              resolve digest
+
+  updateGame: (digest, state) ->
+    new Promise (resolve, reject) =>
+      # refresh expiry timer on digest
+      @db.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
+        if res == 0
+          reject null
+
+        else
+          # update state value
+          @db.hset (@gameKey digest), 'state', (JSON.stringify state), (err, res) =>
+            if res == 0
+              reject null
+
+            else
+              # return game ID
+              logger.info "OK '#{@gameKey digest}' updated"
+              resolve digest
 
 module.exports = new FFTCGSESSION