json_writer.md

JsonWriter

Description

The object_t placeholder companion utility class for writing JSON

class JsonWriter

Constructors

1. 🔹 JsonWriter()

   The JsonWriter constructor.

Functions

1. 🔹 void create(object_t &obj, const String &path, T value)

   Create a JSON object.

   When the path contains "/", the nested JSON object will be created.

   The value supports primitive types values, number_t, boolean_t, string_t objects and object_t.

   void create(object_t &obj, const String &path, T value)

   Params:

   • obj - The object_t to strore the value.

   • path - The JSON path or key.

   • value - The value to set.

2. 🔹 void join(object_t &obj, int nunArgs, ...)

   Put multiple object_t(s) in to a target object_t.

   Example

   object_t json, obj1, obj2, obj3, obj4;
   JsonWriter writer;
   
   writer.create(obj1, "int/value", 9999);
   writer.create(obj2, "string/value", string_t("hello"));
   writer.create(obj3, "float/value", number_t(123.456, 2));
   writer.join(obj4, 3 /* no. of object_t (s) to join */, obj1, obj2, obj3);
   writer.create(json, "node/list", obj4);
   
   object_t arr;
   arr.initArray(); // initialize to be used as array
   writer.join(arr, 4 /* no. of object_t (s) to join */, object_t("[12,34]"), object_t("[56,78]"), object_t(string_t("steve")), object_t(888));
   
   Serial.println(json);
   
   Serial.println(arr);
   

   void join(object_t &obj, int nunArgs, ...)

   Params:

   • obj - The target object_t to store the object_t(s).

   • nunArgs - The numbers of object_t to store.

   • ... - The object_t(s) list.