[proxy] allow prompting the user when a package suitable for current site is found; add proxy's options page

This commit also causes uncached responses to be forced on all
HTTP request to external servers. This is needed to make sure
that changes Haketilo makes to HTTP response headers are always
picked up by the browser. The drawback is that this increases
network traffic causing a performance hit. We might optimize this
in the future.

3 files changed, 39 insertions, 22 deletions

diff --git a/src/hydrilla/proxy/state_impl/base.py b/src/hydrilla/proxy/state_impl/base.py
index 0559a42..75d733f 100644
--- a/src/hydrilla/proxy/state_impl/base.py
+++ b/src/hydrilla/proxy/state_impl/base.py
@@ -140,10 +140,9 @@ class HaketiloStateWithFields(st.HaketiloState):
     """...."""
     store_dir:      Path
     connection:     sqlite3.Connection
+    settings:       st.HaketiloGlobalSettings
     current_cursor: t.Optional[sqlite3.Cursor] = None
 
-    #settings:       st.HaketiloGlobalSettings
-
     secret: bytes = dc.field(default_factory=(lambda: secrets.token_bytes(16)))
 
     policy_tree:   PolicyTree   = PolicyTree()
diff --git a/src/hydrilla/proxy/state_impl/concrete_state.py b/src/hydrilla/proxy/state_impl/concrete_state.py
index 8bd25a9..3611db1 100644
--- a/src/hydrilla/proxy/state_impl/concrete_state.py
+++ b/src/hydrilla/proxy/state_impl/concrete_state.py
@@ -56,10 +56,24 @@ from . import _operations
 here = Path(__file__).resolve().parent
 
 
-@dc.dataclass(frozen=True, unsafe_hash=True)
-class ConcreteRepoIterationRef(st.RepoIterationRef):
-    pass
-
+def load_settings(cursor: sqlite3.Cursor) -> st.HaketiloGlobalSettings:
+    cursor.execute(
+        '''
+        SELECT
+                default_allow_scripts, repo_refresh_seconds, mapping_use_mode
+        FROM
+                general
+        '''
+    )
+
+    (default_allow_scripts, repo_refresh_seconds,
+     mapping_use_mode), = cursor.fetchall()
+
+    return st.HaketiloGlobalSettings(
+        default_allow_scripts = default_allow_scripts,
+        repo_refresh_seconds  = repo_refresh_seconds,
+        mapping_use_mode      = st.MappingUseMode(mapping_use_mode)
+    )
 
 @dc.dataclass
 class ConcreteHaketiloState(base.HaketiloStateWithFields):
@@ -233,9 +247,6 @@ class ConcreteHaketiloState(base.HaketiloStateWithFields):
     def repo_store(self) -> st.RepoStore:
         return repos.ConcreteRepoStore(self)
 
-    def get_repo_iteration(self, repo_iteration_id: str) -> st.RepoIterationRef:
-        return ConcreteRepoIterationRef(repo_iteration_id)
-
     def mapping_store(self) -> st.MappingStore:
         return items.ConcreteMappingStore(self)
 
@@ -255,11 +266,8 @@ class ConcreteHaketiloState(base.HaketiloStateWithFields):
         return self.secret
 
     def get_settings(self) -> st.HaketiloGlobalSettings:
-        return st.HaketiloGlobalSettings(
-            mapping_use_mode       = st.MappingUseMode.AUTO,
-            default_allow_scripts  = False,
-            repo_refresh_seconds   = 0
-        )
+        with self.lock:
+            return self.settings
 
     def update_settings(
             self,
@@ -268,7 +276,18 @@ class ConcreteHaketiloState(base.HaketiloStateWithFields):
             default_allow_scripts: t.Optional[bool]              = None,
             repo_refresh_seconds:  t.Optional[int]               = None
     ) -> None:
-        raise NotImplementedError()
+        with self.cursor(transaction=True) as cursor:
+            def set_opt(col_name: str, val: t.Union[bool, int, str]) -> None:
+                cursor.execute(f'UPDATE general SET {col_name} = ?;', (val,))
+
+            if mapping_use_mode is not None:
+                set_opt('mapping_use_mode', mapping_use_mode.value)
+            if default_allow_scripts is not None:
+                set_opt('default_allow_scripts', default_allow_scripts)
+            if repo_refresh_seconds is not None:
+                set_opt('repo_refresh_seconds', repo_refresh_seconds)
+
+            self.settings = load_settings(cursor)
 
     @staticmethod
     def make(store_dir: Path) -> 'ConcreteHaketiloState':
@@ -277,7 +296,11 @@ class ConcreteHaketiloState(base.HaketiloStateWithFields):
             isolation_level   = None,
             check_same_thread = False
         )
+
+        global_settings = load_settings(connection.cursor())
+
         return ConcreteHaketiloState(
-            store_dir      = store_dir,
-            connection     = connection
+            store_dir  = store_dir,
+            connection = connection,
+            settings   = global_settings
         )
diff --git a/src/hydrilla/proxy/state_impl/repos.py b/src/hydrilla/proxy/state_impl/repos.py
index 8a3fe64..383d147 100644
--- a/src/hydrilla/proxy/state_impl/repos.py
+++ b/src/hydrilla/proxy/state_impl/repos.py
@@ -363,8 +363,3 @@ class ConcreteRepoStore(st.RepoStore):
             result.append(make_repo_display_info(ref, *rest))
 
         return result
-
-
-@dc.dataclass(frozen=True, unsafe_hash=True)
-class ConcreteRepoIterationRef(st.RepoIterationRef):
-    state: base.HaketiloStateWithFields