add lastmode function

[apps/agl-service-homescreen.git] / src / hs-helper.cpp

diff --git a/src/hs-helper.cpp b/src/hs-helper.cpp
index d0f5713..30b53b2 100644 (file)
--- a/src/hs-helper.cpp
+++ b/src/hs-helper.cpp
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <cstdarg>
 #include "hs-helper.h"
+#include <unistd.h>
 
 
 const char* evlist[] = {
@@ -28,6 +29,7 @@ const char* evlist[] = {
     "replyShowWindow",
     "showNotification",
     "showInformation",
+    "application-list-changed",
     "reserved"
   };
 
@@ -271,3 +273,88 @@ std::string get_application_id(const afb_req_t request)
 
     return appid;
 }
+
+/**
+ * read json file
+ *
+ * #### Parameters
+ * - file : file name
+ * - obj : json_object
+ *
+ * #### Return
+ * 0 : read success
+ * -1 : read fail
+ *
+ */
+int readJsonFile(const char* file, struct json_object **obj)
+{
+    int ret = -1;
+    FILE *fp = fopen(file, "rb");
+    if(fp == nullptr) {
+        AFB_ERROR("open %s failed", file);
+        return ret;
+    }
+
+    *obj = nullptr;
+    const int buf_size = 128;
+    char buf[buf_size];
+    struct json_tokener *tokener = json_tokener_new();
+    enum json_tokener_error json_error;
+    while(1) {
+        size_t len = fread(buf, sizeof(char), buf_size, fp);
+        *obj = json_tokener_parse_ex(tokener, buf, len);
+        if(nullptr != *obj) {
+            AFB_NOTICE("read %s success", file);
+            ret = 0;
+            break;
+        }
+
+        json_error = json_tokener_get_error(tokener);
+        if ((json_tokener_continue != json_error) || (buf_size > len)) {
+            AFB_ERROR("parse %s error", file);
+            *obj = nullptr;
+            break;
+        }
+       }
+
+       fclose(fp);
+       json_tokener_free(tokener);
+       return ret;
+}
+
+/**
+ * write to json file
+ *
+ * #### Parameters
+ * - file : output file name
+ * - obj : json_object
+ *
+ * #### Return
+ * 0 : write success
+ * -1 : write fail
+ *
+ */
+int writeJsonFile(const char* file,  struct json_object *obj)
+{
+    int ret = -1;
+    FILE *fp = fopen(file, "wb");
+    if(fp == nullptr) {
+        AFB_ERROR("open %s failed", file);
+        return ret;
+    }
+
+    const char *str = json_object_to_json_string(obj);
+    size_t len = sizeof(str);
+    size_t cnt = fwrite(str, len, 1, fp);
+    if(cnt == len) {
+        ret = 0;
+        fflush(fp);
+        fsync(fileno(fp));
+    }
+    else {
+        AFB_WARNING("write to %s failed.", file);
+    }
+
+    fclose(fp);
+    return ret;
+}
\ No newline at end of file