X-Git-Url: https://osm.etsi.org/gitweb/?p=osm%2FN2VC.git;a=blobdiff_plain;f=modules%2Flibjuju%2Fjuju%2Ftag.py;fp=modules%2Flibjuju%2Fjuju%2Ftag.py;h=282e0a6edb2f5da1bb187b6c25bf31a3b725e364;hp=0000000000000000000000000000000000000000;hb=e2051cca7dac12aa09f6ed33555dcc4548c4b52b;hpb=9d18c22a0dc9e295adda50601fc5e2f45d2c9b8a

diff --git a/modules/libjuju/juju/tag.py b/modules/libjuju/juju/tag.py
new file mode 100644
index 0000000..282e0a6
--- /dev/null
+++ b/modules/libjuju/juju/tag.py
@@ -0,0 +1,40 @@
+# TODO: Tags should be a proper class, so that we can distinguish whether
+# something is already a tag or not.  For example, 'user-foo' is a valid
+# username, but is ambiguous with the already-tagged username 'foo'.
+
+
+def _prefix(prefix, s):
+    if s and not s.startswith(prefix):
+        return '{}{}'.format(prefix, s)
+    return s
+
+
+def untag(prefix, s):
+    if s and s.startswith(prefix):
+        return s[len(prefix):]
+    return s
+
+
+def cloud(cloud_name):
+    return _prefix('cloud-', cloud_name)
+
+
+def credential(cloud, user, credential_name):
+    credential_string = '{}_{}_{}'.format(cloud, user, credential_name)
+    return _prefix('cloudcred-', credential_string)
+
+
+def model(cloud_name):
+    return _prefix('model-', cloud_name)
+
+
+def user(username):
+    return _prefix('user-', username)
+
+
+def application(app_name):
+    return _prefix('application-', app_name)
+
+
+def action(action_uuid):
+    return _prefix('action-', action_uuid)