From b15cddd562760c4bee28534a75a0523efdaad03e Mon Sep 17 00:00:00 2001
From: Thomas Lauf <thomas.lauf@tngtech.com>
Date: Thu, 30 May 2019 14:49:39 +0200
Subject: [PATCH] Create tag database from existing interval database on
 startup

- Closes #224

Signed-off-by: Thomas Lauf <thomas.lauf@tngtech.com>
---
 src/Database.cpp | 41 ++++++++++++++++++++++++++++++-----------
 test/cli.t       | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+), 11 deletions(-)

diff --git a/src/Database.cpp b/src/Database.cpp
index 4d9b3333..689e0c11 100644
--- a/src/Database.cpp
+++ b/src/Database.cpp
@@ -375,22 +375,41 @@ void Database::initializeTagDatabase ()
 
   if (!File::read (_location + "/tags.data", content))
   {
-    return;
-  }
+    auto intervals = getAllInclusions (*this);
+
+    if (intervals.empty ())
+    {
+      return;
+    }
 
-  auto* json = (json::object*) json::parse (content);
+    std::cout << "Tag info database does not exist. Recreating from interval data..." << std::endl  ;
 
-  for (auto& pair : json->_data)
+    for (auto& interval : intervals)
+    {
+      for (auto& tag : interval.tags ())
+      {
+        _tagInfoDatabase.incrementTag (tag);
+      }
+    }
+  }
+  else
   {
-    auto key = pair.first;
-    auto* value = (json::object*) pair.second;
-    auto iter = value->_data.find ("count");
-    if (iter == value->_data.end ())
+    auto *json = (json::object *) json::parse (content);
+
+    for (auto &pair : json->_data)
     {
-      throw format ("Failed to find \"count\" member for tag \"{1}\" in tags database. Database corrupted?", key);
+      auto key = pair.first;
+      auto *value = (json::object *) pair.second;
+      auto iter = value->_data.find ("count");
+
+      if (iter == value->_data.end ())
+      {
+        throw format ("Failed to find \"count\" member for tag \"{1}\" in tags database. Database corrupted?", key);
+      }
+
+      auto number = dynamic_cast<json::number *> (iter->second);
+      _tagInfoDatabase.add (key, TagInfo{(unsigned int) number->_dvalue});
     }
-    auto number = dynamic_cast<json::number *> (iter->second);
-    _tagInfoDatabase.add (key, TagInfo {(unsigned int) number->_dvalue});
   }
 }
 
diff --git a/test/cli.t b/test/cli.t
index 9036459f..8818f3c3 100755
--- a/test/cli.t
+++ b/test/cli.t
@@ -30,6 +30,9 @@ import os
 import shutil
 import sys
 import unittest
+import json
+
+from datetime import datetime, timedelta
 
 # Ensure python finds the local simpletap module
 sys.path.append(os.path.dirname(os.path.abspath(__file__)))
@@ -52,6 +55,37 @@ class TestCLI(TestCase):
 
         assert os.path.isdir(self.t.env["TIMEWARRIORDB"])
         assert os.path.exists(self.t.env["TIMEWARRIORDB"])
+        assert os.path.exists(os.path.join(self.t.env["TIMEWARRIORDB"], "data"))
+        assert os.path.exists(os.path.join(self.t.env["TIMEWARRIORDB"], "data", "tags.data"))
+        assert not os.path.exists(os.path.join(self.t.env["TIMEWARRIORDB"], "data", "undo.data"))
+
+    def test_tag_database_is_recreated(self):
+        """Verify that calling 'timew' recreates tag database"""
+        now_utc = datetime.now().utcnow()
+
+        four_hours_before_utc = now_utc - timedelta(hours=4)
+        three_hours_before_utc = now_utc - timedelta(hours=3)
+        two_hours_before_utc = now_utc - timedelta(hours=2)
+        one_hour_before_utc = now_utc - timedelta(hours=1)
+
+        self.t("track {:%Y-%m-%dT%H:%M:%S} - {:%Y-%m-%dT%H:%M:%S} FOO".format(four_hours_before_utc, three_hours_before_utc))
+        self.t("track {:%Y-%m-%dT%H:%M:%S} - {:%Y-%m-%dT%H:%M:%S} BAR".format(three_hours_before_utc, two_hours_before_utc))
+        self.t("track {:%Y-%m-%dT%H:%M:%S} - {:%Y-%m-%dT%H:%M:%S} FOO".format(two_hours_before_utc, one_hour_before_utc))
+
+        os.remove(os.path.join(self.t.env["TIMEWARRIORDB"], "data", "tags.data"))
+
+        assert not os.path.exists(os.path.join(self.t.env["TIMEWARRIORDB"], "data", "tags.data"))
+
+        self.t.runError("")
+
+        assert os.path.exists(os.path.join(self.t.env["TIMEWARRIORDB"], "data", "tags.data"))
+
+        with open(os.path.join(self.t.env["TIMEWARRIORDB"], "data", "tags.data")) as f:
+            data = json.load(f)
+            self.assertIn("FOO", data)
+            self.assertEqual(data["FOO"]["count"], 2)
+            self.assertIn("BAR", data)
+            self.assertEqual(data["BAR"]["count"], 1)
 
     def test_TimeWarrior_without_command_without_active_time_tracking(self):
         """Call 'timew' without active time tracking"""