Save image item's image to disk

Setup, Configuration and Use Beginners
2

Hi,

I had a similar “problem” for the OpenWeatherMap current condition icon. I use a JavaScript rule (with helper libraries) ..


/**
 * Save/ persist current condition weather icon to file ...
 * The icon is available as item of type Image. 
 * The Image type is a RawType item with according methods to read the data.
 * package: org.openhab.core.library.types;
 * link: https://github.com/openhab/openhab-core/blob/master/bundles/org.openhab.core/src/main/java/org/openhab/core/library/types/RawType.java 
 * 
 */
JSRule({
    name: "save current condition weather icon to filesystem",
    description: "persists the OpenWeatherMap current condition icon image to the local filesystem",
    triggers: [
        UpdatedEventTrigger("OpenWeatherMap_Current_Condition_Icon")
    ],
    execute: function( module, input) {

        logInfo( me  + " triggered ");

        var FileUtils = Java.type("org.apache.commons.io.FileUtils");
        var outFilePath = OPENHAB_CONF + "/icons/classic/" + "currentweatherconditionicon.png";
        var outFile = FileUtils.getFile(outFilePath);


        if (isUninitialized("OpenWeatherMap_Current_Condition_Icon")) {
            logInfo( me + " --- item " + "OpenWeatherMap_Current_Condition_Icon" + " not initialized");
            return;
        }


        var imageBytes = getItem("OpenWeatherMap_Current_Condition_Icon").state.getBytes();
        FileUtils.writeByteArrayToFile(outFile, imageBytes);


    }
});

Alexander