minor backend rework

backend/db.coffee

@@ -17,14 +17,12 @@ messages =
 
 class FFTCGDB
   constructor: (filename, truncate) ->
-    @filename = filename
+    @db = new sqlite3.Database filename, (err) =>
-
-    @db = new sqlite3.Database @filename, (err) =>
       if err
         logger.error err.message
 
       else
-        logger.info "OK open '#{@filename}'"
+        logger.info "OK opened '#{filename}'"
 
         @db.run 'PRAGMA foreign_keys = ON;', (err) =>
           logger.error err.message if err
@@ -80,14 +78,14 @@ class FFTCGDB
             logger.info 'OK clear'
 
   close: ->
-    logger.info 'shutting down'
+    logger.debug 'shutting down'
     new Promise (resolve, reject) =>
       @db.close (err) ->
         if err
           logger.error "FAIL '#{err.message}'"
           reject null
         else
-          logger.warn  "OK close '#{@filename}'"
+          logger.info  "OK closed"
           resolve null
 
   validate: (login, password) ->
@@ -206,13 +204,14 @@ class FFTCGDB
       INSERT INTO decks (user, json)
       VALUES (?, ?)
       '''
-      stmt.run [userID, JSON.stringify deckCards], (err) ->
+      stmt.run [userID, (JSON.stringify deckCards)], (err) ->
         stmt.finalize()
         if err
           logger.warn "addDeck: FAIL db '#{err.code}' for '#{userID}'"
           reject messages.db
 
         else
+          # eslint-disable-next-line @fellow/coffee/missing-fat-arrows
           logger.debug "addDeck: OK '#{@lastID}'"
           resolve @lastID
 
@@ -225,9 +224,11 @@ class FFTCGDB
       '''
       stmt.run [(JSON.stringify deckCards), deckID, userID], (err) ->
         stmt.finalize()
+        isUnchanged =
         if err
           logger.warn "modDeck: FAIL db '#{err.code}' for '#{deckID}'"
           reject messages.db
+        # eslint-disable-next-line
         else if @changes == 0
           logger.warn "no changes for input (#{userID}, #{deckID}, #{JSON.stringify deckCards})!"
           reject messages.db

backend/server.coffee

@@ -56,5 +56,10 @@ fastify.listen 3001, '0.0.0.0'
 
 # Handle termination
 process.on 'SIGUSR2', ->
-  logger.info 'shutting down after SIGINT'
+  (require './db').close()
+  .then ->
+    logger.info 'shutting down normally after SIGINT'
+  .catch ->
+    logger.info 'error shutting down after SIGINT'
+  .finally ->
     process.exit()

backend/session.coffee

@@ -13,11 +13,11 @@ EXPIRY =
 
 class FFTCGSESSION
   constructor: ->
-    @db = redis.createClient
+    @redis = redis.createClient
       host: 'redis'
       port: 6379
 
-    @db.on 'error', (err) ->
+    @redis.on 'error', (err) ->
       logger.error err.message
 
   sessionKey: (digest) -> "session.#{digest}"
@@ -31,7 +31,7 @@ class FFTCGSESSION
       digest = hmac.digest 'base64'
 
       # push (hash, userid) into DB for the configured timespan
-      @db.setex (@sessionKey digest), EXPIRY.login * 86400, userid, =>
+      @redis.setex (@sessionKey digest), EXPIRY.login * 86400, userid, =>
         logger.info "OK '#{@sessionKey digest}' created"
         # return cookie data
         resolve
@@ -42,7 +42,7 @@ class FFTCGSESSION
   destroy: (digest) ->
     new Promise (resolve, reject) =>
       # delete hash immediately
-      @db.del (@sessionKey digest), (err, res) =>
+      @redis.del (@sessionKey digest), (err, res) =>
         if res == 0
           reject null
         else
@@ -52,12 +52,12 @@ class FFTCGSESSION
   check: (digest) ->
     new Promise (resolve, reject) =>
       # refresh expiry timer on digest
-      @db.expire (@sessionKey digest), EXPIRY.login * 86400, (err, res) =>
+      @redis.expire (@sessionKey digest), EXPIRY.login * 86400, (err, res) =>
         if res == 0
           reject null
 
         else
-          @db.get (@sessionKey digest), (err, res) =>
+          @redis.get (@sessionKey digest), (err, res) =>
             logger.debug "OK '#{@sessionKey digest}' resumed"
             resolve res
 
@@ -69,20 +69,20 @@ class FFTCGSESSION
       digest = hmac.digest 'base64'
 
       # insert game key
-      @db.hsetnx (@gameKey digest), 'owner', userid, (err, res) =>
+      @redis.hsetnx (@gameKey digest), 'owner', userid, (err, res) =>
         if res == 0
-          @db.del (@gameKey digest)
+          @redis.del (@gameKey digest)
           reject null
 
         else
-          @db.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
+          @redis.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
             if res == 0
-              @db.del (@gameKey digest)
+              @redis.del (@gameKey digest)
               reject null
 
             else
               # add game to active set
-              @db.sadd (@gameKey 'active'), (@gameKey digest), (err, res) =>
+              @redis.sadd (@gameKey 'active'), (@gameKey digest), (err, res) =>
                 # return game ID
                 logger.info "OK '#{@gameKey digest}' created"
                 resolve digest
@@ -97,7 +97,7 @@ class FFTCGSESSION
 
         return new Promise (resolve, reject) =>
           # scan "active" gameKey
-          @db.sscan (@gameKey 'active'), cursor, 'COUNT', '100', (err, res) ->
+          @redis.sscan (@gameKey 'active'), cursor, 'COUNT', '100', (err, res) ->
             if err
               reject null
 
@@ -121,7 +121,7 @@ class FFTCGSESSION
 
         for key in Array.from set
           activeGames.push new Promise (resolve) =>
-            @db.hget key, 'owner', (err, res) ->
+            @redis.hget key, 'owner', (err, res) ->
               if(err)
                 resolve null
 
@@ -129,20 +129,19 @@ class FFTCGSESSION
 
         Promise.all activeGames
         .then (activeGames) ->
-          console.log activeGames
           resolve activeGames
 
 
   joinGame: (digest, userid) ->
     new Promise (resolve, reject) =>
       # refresh expiry timer on digest
-      @db.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
+      @redis.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) =>
+          @redis.hsetnx (@gameKey digest), 'opponent', userid, (err, res) =>
             if res == 0
               reject null
 
@@ -154,13 +153,13 @@ class FFTCGSESSION
   updateGame: (digest, state) ->
     new Promise (resolve, reject) =>
       # refresh expiry timer on digest
-      @db.expire (@gameKey digest), EXPIRY.game * 86400, (err, res) =>
+      @redis.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) =>
+          @redis.hset (@gameKey digest), 'state', (JSON.stringify state), (err, res) =>
             if res == 0
               reject null