esp-studio-examples/Transformations/lua_parse/luaParseJsonSimple.xml at main · sassoftware/esp-studio-examples · GitHub

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<project name="lua_parse_simple" pubsub="auto" threads="4" heartbeat-interval="1" luaroot="@ESP_PROJECT_OUTPUT@/luaroot">
  <description><![CDATA[This project uses a Lua window to parse JSON data from a CSV file to generate events.]]></description>
  <metadata>
    <meta id="layout">{"cq":{"CreateMulti":{"x":50,"y":175},"Source":{"x":50,"y":50}}}</meta>
    <meta id="studioTags">Example</meta>
    <meta id="studioUploadedBy">anonymous</meta>
    <meta id="studioUploaded">1764344209285</meta>
    <meta id="studioModifiedBy">anonymous</meta>
    <meta id="studioModified">1764344260362</meta>
  </metadata>
  <contqueries>
    <contquery name="cq" trace="Source CreateMulti">
      <windows>
        <window-source insert-only="true" index="pi_EMPTY" name="Source">
          <description><![CDATA[This window receives the input CSV file.]]></description>
          <schema>
            <fields>
              <field name="id" type="string" key="true"/>
              <field name="sensorinfo" type="string"/>
            </fields>
          </schema>
          <connectors>
            <connector class="fs" name="lua_parse_input">
              <properties>
                <property name="type"><![CDATA[pub]]></property>
                <property name="fsname"><![CDATA[@ESP_PROJECT_HOME@/test_files/luaParseJsonSimple.csv]]></property>
                <property name="fstype"><![CDATA[csv]]></property>
              </properties>
            </connector>
          </connectors>
        </window-source>
        <window-lua events="create" index="pi_EMPTY" name="CreateMulti">
          <description><![CDATA[This window uses Lua code to parse the JSON data and generate multiple events.]]></description>
          <schema>
            <fields>
              <field name="id" type="string" key="true"/>
              <field name="device_id" type="string"/>
              <field name="sensor_id" type="string"/>
              <field name="value" type="double"/>
            </fields>
          </schema>
          <copy/>
          <code><![CDATA[local   eventId = 1

function create(data,context)

    local   events = {}
    local   sensorinfo = esp_parseJsonFrom("sensorinfo")

    for index,value in ipairs(sensorinfo)
    do
        local   e = {}

        e.id = tostring(eventId)
        e.device_id = value.device_id
        e.sensor_id = value.sensor_id
        e.value = value.value
        events[index] = e

        eventId = eventId + 1
    end

    return(events)
end]]></code>
        </window-lua>
      </windows>
      <edges>
        <edge source="Source" target="CreateMulti"/>
      </edges>
    </contquery>
  </contqueries>
</project>