classfilterdata() now supports object of objects and object of arrays

The class expression can be stored in either the key to the object
itself, or key/index inside object.

Ticket: CFE-4562
Changelog: Commit
Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>

Author: larsewi

examples/classfilterdata_object_of_arrays_index_in_obj.cf

@@ -0,0 +1,37 @@
+#+begin_src cfengine3
+bundle agent __main__
+{
+  classes:
+      "role_2";
+
+  vars:
+      "original"
+        data => '{
+            "alice":  [  "role_1", 32 ],
+            "bob":    [ "!role_1", 24 ],
+            "malcom": [  "role_2", 27 ]
+          }';
+
+      "filtered"
+        data => classfilterdata("original", "object_of_arrays", "0");
+
+  reports:
+      "Filtered data: $(with)"
+        with => storejson("filtered");
+}
+#+end_src
+
+#+begin_src example_output
+#@ ```
+#@ R: Filtered data: {
+#@   "bob": [
+#@     "!role_1",
+#@     24
+#@   ],
+#@   "malcom": [
+#@     "role_2",
+#@     27
+#@   ]
+#@ }
+#@ ```
+#+end_src

examples/classfilterdata_object_of_arrays_key_to_obj.cf

@@ -0,0 +1,38 @@
+#+begin_src cfengine3
+bundle agent __main__
+{
+  classes:
+      "role_2";
+
+  vars:
+      "original"
+        data => '{
+            "role_1"  : [  "alice", 32 ],
+            "!role_1" : [    "bob", 24 ],
+            "role_2"  : [ "malcom", 27 ]
+          }';
+
+      # Using exogenous key (i.e., the key of the child array within the parent object)
+      "filtered"
+        data => classfilterdata("original", "object_of_arrays");
+
+  reports:
+      "Filtered data: $(with)"
+        with => storejson("filtered");
+}
+#+end_src
+
+#+begin_src example_output
+#@ ```
+#@ R: Filtered data: {
+#@   "!role_1": [
+#@     "bob",
+#@     24
+#@   ],
+#@   "role_2": [
+#@     "malcom",
+#@     27
+#@   ]
+#@ }
+#@ ```
+#+end_src

examples/classfilterdata_object_of_objects_key_in_obj.cf

@@ -0,0 +1,35 @@
+#+begin_src cfengine3
+bundle agent __main__
+{
+  classes:
+      "role_2";
+
+  vars:
+      "original"
+        data => '{
+            "/tmp/foo": { "ifvarclass":          "role_1" },
+            "/tmp/bar": { "ifvarclass":          "role_2" },
+            "/tmp/baz": { "ifvarclass": "(role_1|role_2)" }
+          }';
+
+      "filtered"
+        data => classfilterdata("original", "object_of_objects", "ifvarclass");
+
+  reports:
+      "Filtered data: $(with)"
+        with => storejson("filtered");
+}
+#+end_src
+
+#+begin_src example_output
+#@ ```
+#@ R: Filtered data: {
+#@   "/tmp/bar": {
+#@     "ifvarclass": "role_2"
+#@   },
+#@   "/tmp/baz": {
+#@     "ifvarclass": "(role_1|role_2)"
+#@   }
+#@ }
+#@ ```
+#+end_src

examples/classfilterdata_object_of_objects_key_to_obj.cf

@@ -0,0 +1,36 @@
+#+begin_src cfengine3
+bundle agent __main__
+{
+  classes:
+      "role_2";
+
+  vars:
+      "original"
+        data => '{
+            "role_1":          { "file": "/tmp/foo" },
+            "role_2":          { "file": "/tmp/bar" },
+            "(role_1|role_2)": { "file": "/tmp/baz" }
+          }';
+
+      # Using exogenous key (i.e., the key of the child object within the parent object)
+      "filtered"
+        data => classfilterdata("original", "object_of_objects");
+
+  reports:
+      "Filtered data: $(with)"
+        with => storejson("filtered");
+}
+#+end_src
+
+#+begin_src example_output
+#@ ```
+#@ R: Filtered data: {
+#@   "(role_1|role_2)": {
+#@     "file": "/tmp/baz"
+#@   },
+#@   "role_2": {
+#@     "file": "/tmp/bar"
+#@   }
+#@ }
+#@ ```
+#+end_src