filterx keys function

lib/filterx/CMakeLists.txt

@@ -61,6 +61,7 @@ set(FILTERX_HEADERS
     filterx/object-null.h
     filterx/object-primitive.h
     filterx/object-string.h
+    filterx/func-keys.h
     PARENT_SCOPE
     )
 
@@ -127,6 +128,7 @@ set(FILTERX_SOURCES
     filterx/object-null.c
     filterx/object-primitive.c
     filterx/object-string.c
+    filterx/func-keys.c
     PARENT_SCOPE
     )
 

lib/filterx/Makefile.am

@@ -46,6 +46,7 @@ filterxinclude_HEADERS = 			\
 	lib/filterx/func-flags.h \
 	lib/filterx/func-flatten.h \
 	lib/filterx/func-istype.h \
+	lib/filterx/func-keys.h	\
 	lib/filterx/func-len.h \
 	lib/filterx/func-sdata.h \
 	lib/filterx/func-set-fields.h \
@@ -111,6 +112,7 @@ filterx_sources = 				\
 	lib/filterx/filterx-weakrefs.c \
 	lib/filterx/func-flatten.c \
 	lib/filterx/func-istype.c \
+	lib/filterx/func-keys.c	\
 	lib/filterx/func-len.c \
 	lib/filterx/func-sdata.c \
 	lib/filterx/func-set-fields.c \

lib/filterx/filterx-globals.c

@@ -47,6 +47,7 @@
 #include "filterx/expr-regexp.h"
 #include "filterx/expr-unset.h"
 #include "filterx/filterx-eval.h"
+#include "filterx/func-keys.h"
 
 static GHashTable *filterx_builtin_simple_functions = NULL;
 static GHashTable *filterx_builtin_function_ctors = NULL;
@@ -150,6 +151,7 @@ _ctors_init(void)
   g_assert(filterx_builtin_function_ctor_register("endswith", filterx_function_endswith_new));
   g_assert(filterx_builtin_function_ctor_register("includes", filterx_function_includes_new));
   g_assert(filterx_builtin_function_ctor_register("strftime", filterx_function_strftime_new));
+  g_assert(filterx_builtin_function_ctor_register("keys", filterx_function_keys_new));
 }
 
 static void

lib/filterx/func-keys.c

@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2024 Axoflow
+ * Copyright (c) 2024 shifter
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As an additional exemption you are allowed to compile & link against the
+ * OpenSSL libraries as published by the OpenSSL project. See the file
+ * COPYING for details.
+ *
+ */
+
+#include "filterx/func-keys.h"
+#include "filterx/object-dict-interface.h"
+#include "filterx/object-list-interface.h"
+#include "filterx/object-primitive.h"
+#include "filterx/filterx-eval.h"
+#include "filterx/object-json.h"
+
+typedef struct FilterXFunctionKeys_
+{
+  FilterXFunction super;
+  FilterXExpr *object_expr;
+} FilterXFunctionKeys;
+
+static FilterXObject *
+_eval(FilterXExpr *s)
+{
+  FilterXFunctionKeys *self = (FilterXFunctionKeys *) s;
+
+  FilterXObject *object = filterx_expr_eval(self->object_expr);
+  if (!object)
+    {
+      filterx_eval_push_error("Failed to evaluate first argument. " FILTERX_FUNC_KEYS_USAGE, s, NULL);
+      return NULL;
+    }
+
+  FilterXObject *result = filterx_json_array_new_empty();
+  if (!filterx_dict_keys(object, &result))
+    {
+      filterx_eval_push_error(FILTERX_FUNC_KEYS_ERR_NONDICT FILTERX_FUNC_KEYS_USAGE, s, NULL);
+      filterx_object_unref(result);
+      return NULL;
+    }
+  return result;
+}
+
+static gboolean
+_init(FilterXExpr *s, GlobalConfig *cfg)
+{
+  FilterXFunctionKeys *self = (FilterXFunctionKeys *) s;
+
+  if (!filterx_expr_init(self->object_expr, cfg))
+    return FALSE;
+
+  return filterx_function_init_method(&self->super, cfg);
+}
+
+static void
+_deinit(FilterXExpr *s, GlobalConfig *cfg)
+{
+  FilterXFunctionKeys *self = (FilterXFunctionKeys *) s;
+  filterx_expr_deinit(self->object_expr, cfg);
+  filterx_function_deinit_method(&self->super, cfg);
+}
+
+static void
+_free(FilterXExpr *s)
+{
+  FilterXFunctionKeys *self = (FilterXFunctionKeys *) s;
+  filterx_expr_unref(self->object_expr);
+  filterx_function_free_method(&self->super);
+}
+
+static FilterXExpr *
+_extract_object_expr(FilterXFunctionArgs *args, GError **error)
+{
+  FilterXExpr *object_expr = filterx_function_args_get_expr(args, 0);
+  if (!object_expr)
+    {
+      g_set_error(error, FILTERX_FUNCTION_ERROR, FILTERX_FUNCTION_ERROR_CTOR_FAIL,
+                  "argument must be set: object. " FILTERX_FUNC_KEYS_USAGE);
+      return NULL;
+    }
+
+  return object_expr;
+}
+
+static gboolean
+_extract_args(FilterXFunctionKeys *self, FilterXFunctionArgs *args, GError **error)
+{
+  if (filterx_function_args_len(args) != 1)
+    {
+      g_set_error(error, FILTERX_FUNCTION_ERROR, FILTERX_FUNCTION_ERROR_CTOR_FAIL,
+                  FILTERX_FUNC_KEYS_ERR_NUM_ARGS FILTERX_FUNC_KEYS_USAGE);
+      return FALSE;
+    }
+
+  self->object_expr = _extract_object_expr(args, error);
+  if (!self->object_expr)
+    return FALSE;
+
+  return TRUE;
+}
+
+FilterXExpr *
+filterx_function_keys_new(FilterXFunctionArgs *args, GError **error)
+{
+  FilterXFunctionKeys *self = g_new0(FilterXFunctionKeys, 1);
+  filterx_function_init_instance(&self->super, "keys");
+  self->super.super.eval = _eval;
+  self->super.super.init = _init;
+  self->super.super.deinit = _deinit;
+  self->super.super.free_fn = _free;
+
+  if (!_extract_args(self, args, error) ||
+      !filterx_function_args_check(args, error))
+    goto error;
+
+  filterx_function_args_free(args);
+  return &self->super.super;
+
+error:
+  filterx_function_args_free(args);
+  filterx_expr_unref(&self->super.super);
+  return NULL;
+}

lib/filterx/func-keys.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2024 Axoflow
+ * Copyright (c) 2024 shifter
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As an additional exemption you are allowed to compile & link against the
+ * OpenSSL libraries as published by the OpenSSL project. See the file
+ * COPYING for details.
+ *
+ */
+
+#ifndef FILTERX_FUNC_KEYS_H_INCLUDED
+#define FILTERX_FUNC_KEYS_H_INCLUDED
+
+#include "filterx/expr-function.h"
+
+#define FILTERX_FUNC_KEYS_USAGE "Usage: keys(dict)"
+#define FILTERX_FUNC_KEYS_ERR_NONDICT "Argument must be a dict. "
+#define FILTERX_FUNC_KEYS_ERR_NUM_ARGS "Invalid number of arguments. "
+
+FilterXExpr *filterx_function_keys_new(FilterXFunctionArgs *args, GError **error);
+
+#endif

lib/filterx/object-dict-interface.c

@@ -27,6 +27,7 @@
 #include "filterx/object-json.h"
 #include "filterx/filterx-object-istype.h"
 #include "filterx/filterx-ref.h"
+#include "filterx/object-list-interface.h"
 #include "str-utils.h"
 
 gboolean
@@ -60,6 +61,33 @@ filterx_dict_merge(FilterXObject *s, FilterXObject *other)
   return filterx_dict_iter(other, _add_elem_to_dict, self);
 }
 
+static gboolean
+_add_elem_to_list(FilterXObject *key_obj, FilterXObject *value_obj, gpointer user_data)
+{
+  FilterXObject *list = (FilterXObject *) user_data;
+
+  return filterx_list_append(list, &key_obj);
+}
+
+gboolean
+filterx_dict_keys(FilterXObject *s, FilterXObject **keys)
+{
+  g_assert(s);
+  g_assert(keys);
+  FilterXObject *obj = filterx_ref_unwrap_ro(s);
+  if (!filterx_object_is_type(obj, &FILTERX_TYPE_NAME(dict)))
+    goto error;
+  g_assert(filterx_object_is_type(*keys, &FILTERX_TYPE_NAME(list)));
+
+  gboolean result = filterx_dict_iter(obj, _add_elem_to_list, *keys);
+
+  filterx_object_unref(s);
+  return result;
+error:
+  filterx_object_unref(s);
+  return FALSE;
+}
+
 static gboolean
 _len(FilterXObject *s, guint64 *len)
 {

lib/filterx/object-dict-interface.h

@@ -45,6 +45,7 @@ struct FilterXDict_
 
 gboolean filterx_dict_iter(FilterXObject *s, FilterXDictIterFunc func, gpointer user_data);
 gboolean filterx_dict_merge(FilterXObject *s, FilterXObject *other);
+gboolean filterx_dict_keys(FilterXObject *s, FilterXObject **keys);
 
 void filterx_dict_init_instance(FilterXDict *self, FilterXType *type);
 

lib/filterx/tests/CMakeLists.txt

@@ -26,3 +26,5 @@ add_unit_test(LIBTEST CRITERION TARGET test_expr_plus_generator DEPENDS json-plu
 add_unit_test(LIBTEST CRITERION TARGET test_metrics_labels DEPENDS json-plugin ${JSONC_LIBRARY})
 add_unit_test(LIBTEST CRITERION TARGET test_expr_regexp_search DEPENDS json-plugin ${JSONC_LIBRARY})
 add_unit_test(LIBTEST CRITERION TARGET test_expr_regexp_subst DEPENDS json-plugin ${JSONC_LIBRARY})
+add_unit_test(LIBTEST CRITERION TARGET test_object_dict_interface DEPENDS json-plugin ${JSONC_LIBRARY})
+add_unit_test(LIBTEST CRITERION TARGET test_func_keys DEPENDS json-plugin ${JSONC_LIBRARY})

lib/filterx/tests/Makefile.am

@@ -28,7 +28,9 @@ lib_filterx_tests_TESTS		 =              \
 		lib/filterx/tests/test_expr_plus	\
 		lib/filterx/tests/test_expr_plus_generator \
 		lib/filterx/tests/test_expr_plus \
-		lib/filterx/tests/test_metrics_labels
+		lib/filterx/tests/test_metrics_labels \
+		lib/filterx/tests/test_object_dict_interface \
+		lib/filterx/tests/test_func_keys
 
 EXTRA_DIST += lib/filterx/tests/CMakeLists.txt
 
@@ -117,3 +119,9 @@ lib_filterx_tests_test_expr_plus_generator_LDADD   = $(TEST_LDADD) $(JSON_LIBS)
 
 lib_filterx_tests_test_metrics_labels_CFLAGS  = $(TEST_CFLAGS)
 lib_filterx_tests_test_metrics_labels_LDADD   = $(TEST_LDADD) $(JSON_LIBS)
+
+lib_filterx_tests_test_object_dict_interface_CFLAGS  = $(TEST_CFLAGS)
+lib_filterx_tests_test_object_dict_interface_LDADD   = $(TEST_LDADD) $(JSON_LIBS)
+
+lib_filterx_tests_test_func_keys_CFLAGS  = $(TEST_CFLAGS)
+lib_filterx_tests_test_func_keys_LDADD   = $(TEST_LDADD) $(JSON_LIBS)