Add: HTTP API, with scenario tests

5 files changed, 248 insertions, 85 deletions

diff --git a/muck/__init__.py b/muck/__init__.py
index b286cf0..d78e998 100644
--- a/muck/__init__.py
+++ b/muck/__init__.py
@@ -14,6 +14,7 @@
 
 
 from .exc import Error
+from .idgen import IdGenerator
 from .change import (
     Change,
     CreateChange,
diff --git a/muck/idgen.py b/muck/idgen.py
new file mode 100644
index 0000000..a884b8d
--- /dev/null
+++ b/muck/idgen.py
@@ -0,0 +1,22 @@
+# Copyright (C) 2018  Lars Wirzenius
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import uuid
+
+
+class IdGenerator:
+
+    def new_id(self):
+        return str(uuid.uuid4())
diff --git a/muck/idgen_tests.py b/muck/idgen_tests.py
new file mode 100644
index 0000000..ecab4dd
--- /dev/null
+++ b/muck/idgen_tests.py
@@ -0,0 +1,27 @@
+# Copyright (C) 2018  Lars Wirzenius
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import unittest
+
+import muck
+
+
+class IdGeneratorTests(unittest.TestCase):
+
+    def test_returns_different_value_each_time(self):
+        gen = muck.IdGenerator()
+        id1 = gen.new_id()
+        id2 = gen.new_id()
+        self.assertNotEqual(id1, id2)
diff --git a/muck/mem.py b/muck/mem.py
index 437085d..3100a62 100644
--- a/muck/mem.py
+++ b/muck/mem.py
@@ -13,6 +13,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
+import copy
+
 import muck
 
 
@@ -27,6 +29,61 @@ class MemoryStore:
     def as_dict(self):
         return self._dict
 
+    def __contains__(self, key):
+        return key in self._dict
+
+    def __getitem__(self, key):
+        meta, res = self._dict[key]
+        meta = copy.deepcopy(meta)
+        res = copy.deepcopy(res)
+        return meta, res
+
+    def search(self, conds):
+        hits = []
+        for rid in self._dict:
+            meta, res = self._dict[rid]
+            if any(self._matches(meta, res, cond) for cond in conds):
+                hits.append(rid)
+        return hits
+
+    def _matches(self, meta, res, cond):
+        if cond['where'] not in ('meta', 'data'):  # pragma: no cover
+            return False
+
+        if cond['where'] == 'meta':
+            thing = meta
+        else:
+            thing = res
+
+        field = cond['field']
+        pattern = cond['pattern']
+
+        if field not in thing:  # pragma: no cover
+            return False
+        value = thing[field]
+
+        funcs = {
+            '==': self._equal,
+            '>=': self._ge,
+            '<=': self._le,
+        }
+        if cond['op'] not in funcs:  # pragma: no cover
+            return False
+        is_match = funcs[cond['op']]
+
+        if isinstance(value, list):
+            return any(is_match(pattern, item) for item in value)
+        return is_match(pattern, value)
+
+    def _equal(self, expected, actual):
+        return expected.lower() == actual.lower()
+
+    def _ge(self, expected, actual):
+        return expected.lower() == actual.lower()
+
+    def _le(self, expected, actual):
+        return expected.lower() == actual.lower()
+
     def change(self, chg):
         funcs = {
             'create': self._create,
diff --git a/muck/mem_tests.py b/muck/mem_tests.py
index e858a33..6b7a069 100644
--- a/muck/mem_tests.py
+++ b/muck/mem_tests.py
@@ -20,119 +20,175 @@ import muck
 
 class MemoryStoreTests(unittest.TestCase):
 
-    def test_is_initially_empty(self):
-        ms = muck.MemoryStore()
-        self.assertEqual(len(ms), 0)
-        self.assertEqual(ms.as_dict(), {})
-
-    def test_creates_resource(self):
-        meta = {
+    def setUp(self):
+        self.ms = muck.MemoryStore()
+        self.meta1 = {
             'id': 'id-1',
             'rev': 'rev-1',
         }
-
-        res = {
+        self.res1 = {
             'foo': 'bar',
         }
 
-        chg = muck.CreateChange(meta=meta, res=res)
-        ms = muck.MemoryStore()
-        ms.change(chg)
-        self.assertEqual(len(ms), 1)
+    def test_is_initially_empty(self):
+        self.assertEqual(len(self.ms), 0)
+        self.assertEqual(self.ms.as_dict(), {})
+        self.assertFalse('foo' in self.ms)
+
+    def test_creates_resource(self):
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
+
+        rid = self.meta1['id']
+        self.assertEqual(len(self.ms), 1)
+        self.assertTrue(rid in self.ms)
+        self.assertEqual(self.ms[rid], (self.meta1, self.res1))
         self.assertEqual(
-            ms.as_dict(),
+            self.ms.as_dict(),
             {
-                'id-1': (meta, res),
+                rid: (self.meta1, self.res1),
             })
 
     def test_wont_create_resource_with_conflicting_id(self):
-        meta = {
-            'id': 'id-1',
-            'rev': 'rev-1',
-        }
-
-        res = {
-            'foo': 'bar',
-        }
-
-        chg = muck.CreateChange(meta=meta, res=res)
-        ms = muck.MemoryStore()
-        ms.change(chg)
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
         with self.assertRaises(muck.Error):
-            ms.change(chg)
+            self.ms.change(chg)
 
     def test_updates_resource(self):
-        meta_1 = {
-            'id': 'id-1',
-            'rev': 'rev-1',
-        }
+        meta2 = dict(self.meta1)
+        meta2['rev'] = 'rev-2'
 
-        res_v1 = {
-            'foo': 'bar',
-        }
-
-        meta_2 = dict(meta_1)
-        meta_2['rev'] = 'rev-2'
+        res2 = dict(self.res1)
+        res2['foo'] = 'yo'
 
-        res_v2 = dict(res_v1)
-        res_v2['foo'] = 'yo'
+        create = muck.CreateChange(meta=self.meta1, res=self.res1)
+        update = muck.UpdateChange(meta=meta2, res=res2)
 
-        create = muck.CreateChange(meta=meta_1, res=res_v1)
-        update = muck.UpdateChange(meta=meta_2, res=res_v2)
+        rid = self.meta1['id']
 
-        ms = muck.MemoryStore()
-        ms.change(create)
-        ms.change(update)
-        self.assertEqual(len(ms), 1)
+        self.ms.change(create)
+        self.ms.change(update)
+        self.assertEqual(len(self.ms), 1)
         self.assertEqual(
-            ms.as_dict(),
+            self.ms.as_dict(),
             {
-                'id-1': (meta_2, res_v2),
+                rid: (meta2, res2),
             })
 
     def test_refuses_to_update_resource_that_didnt_exist(self):
-        meta = {
-            'id': 'id-1',
-            'rev': 'rev-1',
-        }
-
-        res = {
-            'foo': 'bar',
-        }
-
-        update = muck.UpdateChange(meta=meta, res=res)
-
-        ms = muck.MemoryStore()
+        update = muck.UpdateChange(meta=self.meta1, res=self.res1)
         with self.assertRaises(muck.Error):
-            ms.change(update)
+            self.ms.change(update)
 
     def test_deletes_resource(self):
-        meta = {
-            'id': 'id-1',
-            'rev': 'rev-1',
-        }
-
-        res = {
-            'foo': 'bar',
-        }
-
-        create = muck.CreateChange(meta=meta, res=res)
-        delete = muck.DeleteChange(meta=meta)
+        create = muck.CreateChange(meta=self.meta1, res=self.res1)
+        delete = muck.DeleteChange(meta=self.meta1)
 
-        ms = muck.MemoryStore()
-        ms.change(create)
-        ms.change(delete)
-        self.assertEqual(len(ms), 0)
-        self.assertEqual(ms.as_dict(), {})
+        self.ms.change(create)
+        self.ms.change(delete)
+        self.assertEqual(len(self.ms), 0)
+        self.assertEqual(self.ms.as_dict(), {})
 
     def test_refuses_to_delete_resource_that_doesnt_exist(self):
-        meta = {
-            'id': 'id-1',
-            'rev': 'rev-1',
-        }
+        delete = muck.DeleteChange(meta=self.meta1)
+        with self.assertRaises(muck.Error):
+            self.ms.change(delete)
 
-        delete = muck.DeleteChange(meta=meta)
+    def test_finds_nothing_for_impossible_condition(self):
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
 
-        ms = muck.MemoryStore()
-        with self.assertRaises(muck.Error):
-            ms.change(delete)
+        cond = [
+            {
+                'where': 'meta',
+                'field': 'id',
+                'pattern': 'does-not-exist',
+                'op': '==',
+            },
+        ]
+        hits = self.ms.search(cond)
+        self.assertEqual(hits, [])
+
+    def test_finds_matching_resources_in_meta(self):
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
+
+        rid = self.meta1['id']
+        cond = [
+            {
+                'where': 'meta',
+                'field': 'id',
+                'pattern': rid,
+                'op': '==',
+            },
+        ]
+        hits = self.ms.search(cond)
+        self.assertEqual(hits, [rid])
+
+    def test_finds_matching_resources_in_data(self):
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
+
+        rid = self.meta1['id']
+        cond = [
+            {
+                'where': 'data',
+                'field': 'foo',
+                'pattern': self.res1['foo'],
+                'op': '==',
+            },
+        ]
+        hits = self.ms.search(cond)
+        self.assertEqual(hits, [rid])
+
+    def test_finds_matches_in_list(self):
+        self.res1['foo'] = ['bar', 'yo']
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
+
+        rid = self.meta1['id']
+        cond = [
+            {
+                'where': 'data',
+                'field': 'foo',
+                'pattern': 'yo',
+                'op': '==',
+            },
+        ]
+        hits = self.ms.search(cond)
+        self.assertEqual(hits, [rid])
+
+    def test_finds_ge(self):
+        self.res1['foo'] = ['bar', 'yo']
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
+
+        rid = self.meta1['id']
+        cond = [
+            {
+                'where': 'data',
+                'field': 'foo',
+                'pattern': 'yo',
+                'op': '>=',
+            },
+        ]
+        hits = self.ms.search(cond)
+        self.assertEqual(hits, [rid])
+
+    def test_finds_le(self):
+        self.res1['foo'] = ['bar', 'yo']
+        chg = muck.CreateChange(meta=self.meta1, res=self.res1)
+        self.ms.change(chg)
+
+        rid = self.meta1['id']
+        cond = [
+            {
+                'where': 'data',
+                'field': 'foo',
+                'pattern': 'bar',
+                'op': '<=',
+            },
+        ]
+        hits = self.ms.search(cond)
+        self.assertEqual(hits, [rid])