git init1.1.103

1 files changed, 168 insertions, 0 deletions

diff --git a/lib/json.c b/lib/json.c
new file mode 100644
index 0000000..0511dcd
--- /dev/null
+++ b/lib/json.c
@@ -0,0 +1,168 @@
+/*
+ * json.c
+ *
+ * See the README file for copyright information and how to reach the author.
+ *
+ */
+
+#include "json.h"
+
+#ifdef USEJSON
+
+const char* charset = "utf-8";  // #TODO, move to configuration?
+
+//***************************************************************************
+// Copy JSON Object to Data Buffer
+//***************************************************************************
+
+int json2Data(json_t* obj, MemoryStruct* data, const char* encoding)
+{
+   int status = success;
+
+   // will be freed by data's dtor
+
+   data->memory = json_dumps(obj, JSON_PRESERVE_ORDER);
+   data->size = strlen(data->memory);
+   sprintf(data->contentType, "application/json; charset=%s", charset);
+
+   // gzip content if supported by browser ...
+
+   if (data->size && encoding && strstr(encoding, "gzip"))
+      status = data->toGzip();
+
+   return status;
+}
+
+//***************************************************************************
+// Add field to json object
+//***************************************************************************
+
+int addFieldToJson(json_t* obj, cDbValue* value, int ignoreEmpty, const char* extName)
+{
+   char* name;
+
+   if (!value || !value->getField())
+      return fail;
+
+   name = strdup(extName ? extName : value->getField()->getName());
+   toCase(cLower, name);   // use always lower case names in json
+
+   switch (value->getField()->getFormat())
+   {
+      case cDBS::ffAscii:
+      case cDBS::ffText:
+      case cDBS::ffMText:
+         if (!ignoreEmpty || !isEmpty(value->getStrValue()))
+            json_object_set_new(obj, name, json_string(value->getStrValue()));
+         break;
+
+      case cDBS::ffInt:
+      case cDBS::ffUInt:
+         json_object_set_new(obj, name, json_integer(value->getIntValue()));
+         break;
+
+      case cDBS::ffFloat:
+         json_object_set_new(obj, name, json_real(value->getFloatValue()));
+         break;
+
+      default:
+         break;
+   }
+
+   free(name);
+
+   return success;
+}
+
+//***************************************************************************
+// Add field to json object
+//***************************************************************************
+
+int addFieldToJson(json_t* obj, cDbTable* table, const char* fname,
+                   int ignoreEmpty, const char* extName)
+{
+   return addFieldToJson(obj, table->getValue(fname), ignoreEmpty, extName);
+}
+
+//***************************************************************************
+// Get Field From Json
+//   - if a default is required put it into the row
+//     before calling this function
+//***************************************************************************
+
+int getFieldFromJson(json_t* obj, cDbRow* row, const char* fname, const char* extName)
+{
+   cDbValue* value = row->getValue(fname);
+   char* jname;
+
+   if (!value)
+      return fail;
+
+   jname = strdup(!isEmpty(extName) ? extName : value->getField()->getName());
+   toCase(cLower, jname);   // use always lower case names in json
+
+   switch (value->getField()->getFormat())
+   {
+      case cDBS::ffAscii:
+      case cDBS::ffText:
+      case cDBS::ffMText:
+      {
+         const char* v = getStringFromJson(obj, jname, "");
+         if (!isEmpty(v) || !value->isEmpty())
+            value->setValue(v);
+         break;
+      }
+
+      case cDBS::ffInt:
+      case cDBS::ffUInt:
+      {
+         int v = getIntFromJson(obj, jname, na);
+         const char* s = getStringFromJson(obj, jname, "");
+
+         if (s && strcmp(s, "null") == 0)
+            value->setNull();
+         else if (v != na || !value->isEmpty())
+            value->setValue(v);
+         break;
+      }
+
+//    case cDBS::ffFloat:    #TODO to be implemented
+//    {
+//       double v = getFloatFromJson(obj, jname, na);
+//       if (v != na) value->setValue(v);
+//       break;
+//    }
+
+      default:
+         break;
+   }
+
+   return success;
+}
+
+//***************************************************************************
+// Get Elements
+//***************************************************************************
+
+const char* getStringFromJson(json_t* obj, const char* name, const char* def)
+{
+   json_t* o = json_object_get(obj, name);
+
+   if (!o)
+      return def;
+
+   return json_string_value(o);
+}
+
+int getIntFromJson(json_t* obj, const char* name, int def)
+{
+   json_t* o = json_object_get(obj, name);
+
+   if (!o)
+      return def;
+
+   return json_integer_value(o);
+}
+
+//***************************************************************************
+#endif // USEJSON