give an Exports object (actually, ExportsContex object) to each module, to

facilitate things like !set and !channelset without using the events system

1 files changed, 44 insertions, 0 deletions

diff --git a/Exports.py b/Exports.py
new file mode 100644
index 00000000..8baca50d
--- /dev/null
+++ b/Exports.py
@@ -0,0 +1,44 @@
+
+
+class ExportsContext(object):
+    def __init__(self, parent, context):
+        self._parent = parent
+        self.context = context
+
+    def add(self, setting, value):
+        self._parent._context_add(self.context, setting, value)
+    def get_all(self, setting):
+        return self._parent.get_all(setting)
+
+class Exports(object):
+    def __init__(self):
+        self._exports = {}
+        self._context_exports = {}
+
+    def new_context(self, context):
+        return ExportsContext(self, context)
+
+    def add(self, setting, value):
+        self._add(None, setting, value)
+    def _context_add(self, context, setting, value):
+        self._add(context, setting, value)
+    def _add(self, context, setting, value):
+        if context == None:
+            if not setting in self_exports:
+                self._exports[setting] = []
+            self._exports[setting].append(value)
+        else:
+            if not context in self._context_exports:
+                self._context_exports[context] = {}
+            if not setting in self._context_exports[context]:
+                self._context_exports[context][setting] = []
+            self._context_exports[context][setting].append(value)
+
+    def get_all(self, setting):
+        return self._exports.get(setting, []) + sum([
+            exports.get(setting, []) for exports in
+            self._context_exports.values()], [])
+
+    def purge_context(self, context):
+        if context in self._context_exports:
+            del self._context_exports[context]