feat: add user persistence functions

src/persist/persist.c

@@ -1224,3 +1224,81 @@ int neu_persister_delete_node_setting(neu_persister_t *persister,
     return execute_sql(persister->db, "DELETE FROM settings WHERE node_name=%Q",
                        node_name);
 }
+
+int neu_persister_store_user(neu_persister_t *              persister,
+                             const neu_persist_user_info_t *user)
+{
+    return execute_sql(persister->db,
+                       "INSERT INTO users (name, password) VALUES (%Q, %Q)",
+                       user->name, user->hash);
+}
+
+int neu_persister_update_user(neu_persister_t *              persister,
+                              const neu_persist_user_info_t *user)
+{
+    return execute_sql(persister->db,
+                       "UPDATE users SET password=%Q WHERE name=%Q", user->hash,
+                       user->name);
+}
+
+int neu_persister_load_user(neu_persister_t *persister, const char *user_name,
+                            neu_persist_user_info_t **user_p)
+{
+    neu_persist_user_info_t *user  = NULL;
+    sqlite3_stmt *           stmt  = NULL;
+    const char *             query = "SELECT password FROM users WHERE name=?";
+
+    if (SQLITE_OK !=
+        sqlite3_prepare_v2(persister->db, query, -1, &stmt, NULL)) {
+        nlog_error("prepare `%s` with `%s` fail: %s", query, user_name,
+                   sqlite3_errmsg(persister->db));
+        return NEU_ERR_EINTERNAL;
+    }
+
+    if (SQLITE_OK != sqlite3_bind_text(stmt, 1, user_name, -1, NULL)) {
+        nlog_error("bind `%s` with `%s` fail: %s", query, user_name,
+                   sqlite3_errmsg(persister->db));
+        goto error;
+    }
+
+    if (SQLITE_ROW != sqlite3_step(stmt)) {
+        nlog_warn("SQL `%s` with `%s` fail: %s", query, user_name,
+                  sqlite3_errmsg(persister->db));
+        goto error;
+    }
+
+    user = calloc(1, sizeof(*user));
+    if (NULL == user) {
+        goto error;
+    }
+
+    user->hash = strdup((char *) sqlite3_column_text(stmt, 0));
+    if (NULL == user->hash) {
+        nlog_error("strdup fail");
+        goto error;
+    }
+
+    user->name = strdup(user_name);
+    if (NULL == user->name) {
+        nlog_error("strdup fail");
+        goto error;
+    }
+
+    *user_p = user;
+    sqlite3_finalize(stmt);
+    return 0;
+
+error:
+    if (user) {
+        neu_persist_user_info_fini(user);
+        free(user);
+    }
+    sqlite3_finalize(stmt);
+    return NEU_ERR_EINTERNAL;
+}
+
+int neu_persister_delete_user(neu_persister_t *persister, const char *user_name)
+{
+    return execute_sql(persister->db, "DELETE FROM users WHERE name=%Q",
+                       user_name);
+}

src/persist/persist.h

@@ -46,6 +46,11 @@ typedef struct {
     char *group_name;
 } neu_persist_subscription_info_t;
 
+typedef struct {
+    char *name;
+    char *hash;
+} neu_persist_user_info_t;
+
 static inline void neu_persist_plugin_infos_free(UT_array *plugin_infos)
 {
     utarray_free(plugin_infos);
@@ -69,6 +74,12 @@ neu_persist_subscription_info_fini(neu_persist_subscription_info_t *info)
     free(info->group_name);
 }
 
+static inline void neu_persist_user_info_fini(neu_persist_user_info_t *info)
+{
+    free(info->name);
+    free(info->hash);
+}
+
 /**
  * Persister, provide methods to persist data */
 typedef struct neu_persister neu_persister_t;
@@ -305,6 +316,43 @@ int neu_persister_load_node_setting(neu_persister_t *  persister,
 int neu_persister_delete_node_setting(neu_persister_t *persister,
                                       const char *     node_name);
 
+/**
+ * Save user info.
+ * @param persister                 persister object.
+ * @param user                      user info
+ * @return 0 on success, none-zero on failure
+ */
+int neu_persister_store_user(neu_persister_t *              persister,
+                             const neu_persist_user_info_t *user);
+
+/**
+ * Update user info.
+ * @param persister                 persister object.
+ * @param user                      user info
+ * @return 0 on success, none-zero on failure
+ */
+int neu_persister_update_user(neu_persister_t *              persister,
+                              const neu_persist_user_info_t *user);
+
+/**
+ * Load user info.
+ * @param persister                 persister object.
+ * @param user_name                 name of the user.
+ * @param user_p                    output parameter of user info
+ * @return 0 on success, none-zero on failure
+ */
+int neu_persister_load_user(neu_persister_t *persister, const char *user_name,
+                            neu_persist_user_info_t **user_p);
+
+/**
+ * Delete user info.
+ * @param persister                 persister object.
+ * @param user_name                 name of the user.
+ * @return 0 on success, none-zero on failure
+ */
+int neu_persister_delete_user(neu_persister_t *persister,
+                              const char *     user_name);
+
 #ifdef __cplusplus
 }
 #endif