DataManager.loadDataFile

[p0_boy]

Howdy, folks-

I have the following code:

let event_to_clone = (eventId_code) => {

    let result = {};

    switch (eventId_code === parseInt(eventId_code, 10)) {
        case false:
            let temporary = eventId_code.toString().split(`.`);
            let mapId = temporary[0];
            let eventId = Number(temporary[1]);

            let filename = `Map` + (mapId.length === 1 ? `00` : (mapId.length === 2 ? `0` : ``)) + mapId + `.json`;

            DataManager.loadDataFile(`$dataTemporary`, filename);

            result = Object.assign({}, $dataTemporary.events[eventId]);
            break;
        case true:
            result = Object.assign({}, $dataMap.events[eventId_code]);
            break;
    }

    return result;

};

However, whenever I execute it, the following error occurs:

There seems to be no problem though if, after the error, I type $dataTemporary into the console window:

I am deducing that:

result = Object.assign({}, $dataTemporary.events[eventId]);

is executing before DataManager.loadDataFile is able to load said file into $dataTemporary?

What am I doing wrong?

As always, thank you in advance for any pointers / insights that you might be able to provide!

 

[gstv87]

*loaded* games won't always have the same data structure if they were saved by a program that didn't create that data structure before saving the file.

you'll probably have to scrap that file and save a new one.

 

[Poryg]

Files need time before they load. The reason is, they are loaded asynchronously. So your assumption was correct.

 

[p0_boy]

Files need time before they load. The reason is, they are loaded asynchronously. So your assumption was correct.

@Poryg thanks for confirming my suspicion. Would you happen to have any suggestions on how to do this with DataManager?

According to the RPGMakerMV Library, .loadDataFile doesn't return anything, so I don't think I can use .then or await.

Edit:
I was trying to avoid writing more functions by using the default library, but apparently using DataManager to load map data is bad practice because the $dataTemporary variable I am creating is global.

Better practice is laid out in this older forum thread.

 

[Poryg]

Actually, await or then wouldn't work anyway, since the main thing happens asynchronously (during xhr.onload) and you cannot use async/await in combo with async calls.
The only way to do it is to do the remaining stuff in next frame.

 

[p0_boy]

This works:

function load_text_file (text_fn) {
 
    let return_value = ``;

    let rawFILE = new XMLHttpRequest();
    rawFILE.open(`GET`, text_fn, false);
    rawFILE.onreadystatechange = function () {

        if (rawFILE.status === 200 || rawFILE.status == 0) {

            let allText = rawFILE.responseText;
            return_value = allText;

        };

    };

    rawFILE.send(null);

    return return_value;

};


let event_to_clone = (eventId_code) => {

    let result = {};

    switch (eventId_code === parseInt(eventId_code, 10)) {
        case false:
            // Parse eventId_code.
            let temporary = eventId_code.toString().split(`.`);
            let mapId = temporary[0];
            let eventId = Number(temporary[1]);

            // Format map filename.
            let folder = document.URL.substring(0,(document.URL.length - (document.URL.substring(document.URL.lastIndexOf(`/`) + 1)).length)) + `/data/`;
            let filename = `Map` + (mapId.length === 1 ? `00` : (mapId.length === 2 ? `0` : ``)) + mapId + `.json`;

            // Load map into temporary object.
            raw_json = load_text_file(folder + filename);
            map_object = JSON.parse(raw_json);

            // Return requested event from that object.
            result = Object.assign({}, map_object.events[eventId]);
            break;
        case true:
            // Return requested event from current map.
            result = Object.assign({}, $dataMap.events[eventId_code]);
            break;
    }

    return result;

};

 

[slimmmeiske2]

This thread is being closed, due to being solved. If for some reason you would like this thread re-opened, please report this post and leave a message why. Thank you.