Export, import, merge history

[AlttiRi]

I need to implement export, import, merge download history.

However, I need to totally refactor the related code. Make the localStorage values names more clear.

Also I need to change the archive format for videos, since there multi-videos tweets.
At least for new ones.
So, I need to keep for videos the new and old history arrays.

---

Temporary, you can use in the browsers console the follow code snippets: #12 (comment) for exporting, importing, merging the history.
Just open the browser's console on https://twitter.com and paste the required code snippet.
For importing/merging click on the web page first to focus the page of the web site.

[AlttiRi]

While it is not implemented you can manually import/export (history + settings) by running the follow code in the browser's console:

The outdated version

To export:

let exportObject = [
    "ujs-click-n-save-settings",
    "ujs-images-history-by",
    "ujs-twitter-downloaded-images-names",
    "ujs-twitter-downloaded-image-tweet-ids", 
    "ujs-twitter-downloaded-video-tweet-ids"
    ].reduce((acc, name) => {
        const value = localStorage.getItem(name);
        if (value === null) {
            return acc;
        }
        acc[name] = localStorage.getItem(name);
        return acc;
    }, {});
downloadBlob(new Blob([JSON.stringify(exportObject)]), "ujs-c'n's-export.json");
function downloadBlob(blob, name, url) {
    const anchor = document.createElement("a");
    anchor.setAttribute("download", name || "");
    const blobUrl = URL.createObjectURL(blob);
    anchor.href = blobUrl + (url ? ("#" + url) : "");
    anchor.click();
    setTimeout(() => URL.revokeObjectURL(blobUrl), 8000);
}

To import:

let input = document.createElement("input");
input.type = "file";
input.accept = "application/json";
document.body.prepend(input);
input.addEventListener("change", async event => {
    const json = JSON.parse(await input.files[0].text());

    console.log("json", json);
    globalThis.json = json;

    Object.entries(json).forEach(([key, value]) => {
        localStorage.setItem(key, value);
    });
});
input.click();

The new code snippets: #12 (comment)

[AlttiRi]

In Firefox input.click(); does not work (from the browser's console).

You need manually click here to open the file selector:

[biggestsonicfan]

On twitter the button is unclickable due to the twitter logo. Going to another site it allows me to click the button and select the file but nothing happens.

[AlttiRi]

It should be done exactly on https://twitter.com origin.

Each "site" (origin) has its own LocalStorage database.

---

Just checked it works fine for me.

[AlttiRi]

Also input.click(); (to open the file chooser automatically) works, if you click on the web site first (just click on any element, for example, on a text) before running the script in the console.

[biggestsonicfan]

Ah, got it, it worked that time, thank you!

[biggestsonicfan]

You've got to be kidding me. This import overwrites existing entries and doesn't merge them?! I lost all my history again...

[AlttiRi]

Yes, this temporal workaround overwrites.

I did not write, that it does merge:
#12 (comment)
Here is the export and the import code snippets only.

The merge option should be the third option (export, import and merge).

[AlttiRi]

Here is the new versions.
They use the new, more correct, form of the JSON file (no more "[\"abcd\",\"qwert\"]", now it's ["abcd","qwert"]).

With the merge code snippet.

---

ONLY FOR THE OLD VERSION

To export:

let exportObject = [
    "ujs-click-n-save-settings",
    "ujs-images-history-by",
    "ujs-twitter-downloaded-images-names",
    "ujs-twitter-downloaded-image-tweet-ids",
    "ujs-twitter-downloaded-video-tweet-ids"
].reduce((acc, name) => {
    const value = localStorage.getItem(name);
    if (value === null) {
        return acc;
    }
    acc[name] = JSON.parse(value);
    return acc;
}, {});
downloadBlob(new Blob([JSON.stringify(exportObject)]), "ujs-tcas-export.json");
function downloadBlob(blob, name, url) {
    const anchor = document.createElement("a");
    anchor.setAttribute("download", name || "");
    const blobUrl = URL.createObjectURL(blob);
    anchor.href = blobUrl + (url ? ("#" + url) : "");
    anchor.click();
    setTimeout(() => URL.revokeObjectURL(blobUrl), 8000);
}

To import:

let importInput = document.createElement("input");
importInput.type = "file";
importInput.accept = "application/json";
document.body.prepend(importInput);
importInput.addEventListener("change", async event => {
    const json = JSON.parse(await importInput.files[0].text());

    console.log("json", json);
    globalThis.json = json;

    Object.entries(json).forEach(([key, value]) => {
        localStorage.setItem(key, JSON.stringify(value));
    });
});
importInput.click();

To merge:

let mergeInput = document.createElement("input");
mergeInput.type = "file";
mergeInput.accept = "application/json";
document.body.prepend(mergeInput);
mergeInput.addEventListener("change", async event => {
    const json = JSON.parse(await mergeInput.files[0].text());

    console.log("json", json);
    globalThis.json = json;

    Object.entries(json).forEach(([key, value]) => {
        const existedValue = JSON.parse(localStorage.getItem(key));
        if (Array.isArray(existedValue)) {
            value = [...new Set([...existedValue, ...value])];
        }
        localStorage.setItem(key, JSON.stringify(value));
    });
});
mergeInput.click();

[AlttiRi]

Finally, made it.

• three buttons: "export", "import", "merge".
• changed LocalStorare keys for unification.

---

0838777 Migrate to new LocalStorage names
fe50907 Support "continuous migration"
85da601 Add listeners for historyHelper (export/import/merge history)
ee6664c Add verify, onDone/onError for "import"/"merge"
af79609 Add the browser name in the export file name