From db967939789333cf7d992900923723160e2d2b2f Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Mon, 23 May 2016 00:49:12 -0400
Subject: save sessions to database

---
 src/guff.cr | 68 +++++++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 53 insertions(+), 15 deletions(-)

diff --git a/src/guff.cr b/src/guff.cr
index 923f8f6..5fa461e 100644
--- a/src/guff.cr
+++ b/src/guff.cr
@@ -478,28 +478,50 @@ module Guff
       end
     end
 
+    # TODO: handle session expiration
     class SessionModel < Model
-      def initialize(context : Context)
-        super(context)
-        @sessions = {} of String => String
-      end
+      SQL = {
+        load: "
+          SELECT data
+
+            FROM sessions
+
+           WHERE id = ?
+             -- TODO:
+             -- AND strftime('%s', created_at, '1 week') > strftime('%s')
+             -- AND strftime('%s', updated_at, '2 hours') > strftime('%s')
+        ",
+
+        save: "
+          UPDATE sessions
+
+             SET updated_at = CURRENT_TIMESTAMP,
+                 data = ?
+
+           WHERE id = ?
+        ",
+
+        delete: "
+          DELETE FROM sessions WHERE id = ?
+        ",
+
+        create: "
+          INSERT INTO sessions(id, data) VALUES (?, ?)
+        ",
+      }
 
       def load(id : String) : String?
-        @sessions[id]?
+        @context.dbs.ro.one(SQL[:load], [id])
       end
 
       def save(id : String, data : String)
-        if @sessions.has_key?(id)
-          @sessions[id] = data
-          true
-        else
-          false
-        end
+        @context.dbs.rw.query(SQL[:save], [data, id])
+        nil
       end
 
       def delete(id : String?)
-        @sessions.delete(id) if id
-        false
+        @context.dbs.rw.query(SQL[:delete], [id]) if id
+        nil
       end
 
       def create(data : String) : String
@@ -507,7 +529,7 @@ module Guff
         r = SecureRandom.hex(32)
 
         # save session
-        @sessions[r] = data
+        @context.dbs.rw.query(SQL[:create], [r, data])
 
         # return session id
         r
@@ -656,7 +678,7 @@ module Guff
 
     def save
       if valid?
-        @context.models.session.save(@session_id, to_json)
+        @context.models.session.save(@session_id.not_nil!, to_json)
 
         # return success
         true
@@ -941,6 +963,10 @@ module Guff
         end
 
         call_next(context)
+
+        if @context.session.valid?
+          @context.session.save
+        end
       end
     end
 
@@ -1618,6 +1644,18 @@ module Guff
             layout_id   INTEGER NOT NULL
                         REFERENCES layouts(layout_id)
           )
+        }, %{
+          CREATE TABLE sessions (
+            id          TEXT PRIMARY KEY,
+
+            created_at  TIMESTAMP WITH TIME ZONE NOT NULL
+                        DEFAULT CURRENT_TIMESTAMP,
+
+            updated_at  TIMESTAMP WITH TIME ZONE NOT NULL
+                        DEFAULT CURRENT_TIMESTAMP,
+
+            data        TEXT NOT NULL
+          )
         }]
 
         def run
-- 
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