feat(core): add template manager

CMakeLists.txt

@@ -104,6 +104,7 @@ set(NEURON_SOURCES
     src/core/subscribe.c
     src/core/plugin_manager.c
     src/core/node_manager.c
+    src/core/template_manager.c
     src/core/storage.c
     src/adapter/storage.c
     src/adapter/adapter.c

src/core/template_manager.c

@@ -0,0 +1,94 @@
+/**
+ * NEURON IIoT System for Industry 4.0
+ * Copyright (C) 2020-2023 EMQ Technologies Co., Ltd All rights reserved.
+ *
+ * This program 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 3 of the License, or (at your option) any later version.
+ *
+ * This program 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 program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ **/
+
+#include "base/template.h"
+#include "utils/uthash.h"
+
+#include "template_manager.h"
+
+typedef struct {
+    neu_template_t *tmpl;
+    UT_hash_handle  hh;
+} name_entry_t;
+
+static inline void template_entry_free(name_entry_t *ent)
+{
+    neu_template_free(ent->tmpl);
+    free(ent);
+}
+
+struct neu_template_manager_s {
+    name_entry_t *name_map;
+};
+
+neu_template_manager_t *neu_template_manager_create()
+{
+    neu_template_manager_t *mgr = calloc(1, sizeof(*mgr));
+    return mgr;
+}
+
+void neu_template_manager_destroy(neu_template_manager_t *mgr)
+{
+    if (NULL == mgr) {
+        return;
+    }
+
+    name_entry_t *ent = NULL, *tmp = NULL;
+    HASH_ITER(hh, mgr->name_map, ent, tmp)
+    {
+        HASH_DEL(mgr->name_map, ent);
+        template_entry_free(ent);
+    }
+
+    free(mgr);
+}
+
+int neu_template_manager_add(neu_template_manager_t *mgr, neu_template_t *tmpl)
+{
+    name_entry_t *ent = calloc(1, sizeof(*ent));
+    if (NULL == ent) {
+        return -1;
+    }
+
+    ent->tmpl        = tmpl;
+    const char *name = neu_template_name(tmpl);
+    HASH_ADD_KEYPTR(hh, mgr->name_map, name, strlen(name), ent);
+    return 0;
+}
+
+int neu_template_manager_del(neu_template_manager_t *mgr, const char *name)
+{
+    name_entry_t *ent = NULL;
+    HASH_FIND(hh, mgr->name_map, name, strlen(name), ent);
+    if (NULL == ent) {
+        return -1;
+    }
+
+    HASH_DEL(mgr->name_map, ent);
+    template_entry_free(ent);
+    return 0;
+}
+
+const neu_template_t *
+neu_template_manager_find(const neu_template_manager_t *mgr, const char *name)
+{
+    name_entry_t *ent = NULL;
+    HASH_FIND(hh, mgr->name_map, name, strlen(name), ent);
+    return ent ? ent->tmpl : NULL;
+}

src/core/template_manager.h

@@ -0,0 +1,36 @@
+/**
+ * NEURON IIoT System for Industry 4.0
+ * Copyright (C) 2021-2023 EMQ Technologies Co., Ltd All rights reserved.
+ *
+ * This program 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 3 of the License, or (at your option) any later version.
+ *
+ * This program 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 program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ **/
+
+#ifndef _NEU_TEMPLATE_MANAGER_H_
+#define _NEU_TEMPLATE_MANAGER_H_
+
+#include "base/template.h"
+
+typedef struct neu_template_manager_s neu_template_manager_t;
+
+neu_template_manager_t *neu_template_manager_create();
+void neu_template_manager_destroy(neu_template_manager_t *mgr);
+
+int neu_template_manager_add(neu_template_manager_t *mgr, neu_template_t *tmpl);
+int neu_template_manager_del(neu_template_manager_t *mgr, const char *name);
+
+const neu_template_t *
+neu_template_manager_find(const neu_template_manager_t *mgr, const char *name);
+
+#endif