Store yomichan lookups in localstorage

README.md

This script is designed to be used with yomichan's clipboard inserter and stores the frequencies of performed lookups in JSON format.

{
  "version": "0.1-alpha",
  "terms": {
    "母娘": { "frequency": 1 },
    "関与": { "frequency": 1 },
    "少年": { "frequency": 3 }
  }
}

A hacky workaround for: FooSoft/yomichan#93

How to use

1. enable yomichan's clipboard monitor
2. open devtools (inspect element) inside the clipboard monitor window
3. paste the yomichan-store-lookups.js script in the console

How to export the data

1. open devtools (inspect element) inside the clipboard monitor window
2. open the "Application" tab
3. expand the Storage > Local Storage list item
4. copy the content of the Value field where the key is equal to yomichan-lookups
5. perform your own analytics based on the json data

Disclaimer

This script may be modified at any moment without guarantees and it may break. Use with caution.

yomichan-store-lookups.js

(function () {
  const localStorageKey = "yomichan-lookups";
  document.addEventListener("selectionchange", debounce(handleClick));

  function handleClick() {
    const selectedText = window.getSelection().toString();
    if (selectedText?.trim()?.length >= 1) {
      upsertRecord(selectedText);
    }
  }

  function upsertRecord(term) {
    let db =
      JSON.parse(window.localStorage.getItem(localStorageKey)) ?? createDb();
    let affectedRecord = db["terms"][term] ?? { frequency: 0 };
    affectedRecord["frequency"]++;
    db["terms"][term] = affectedRecord;
    window.localStorage.setItem(localStorageKey, JSON.stringify(db));
  }

  function createDb() {
    return {
      version: "0.1-alpha",
      terms: {},
    };
  }

  function debounce(f, timeout) {
    let timer;
    return (...args) => {
      clearTimeout(timer);
      timer = setTimeout(() => f.apply(this, args), timeout);
    };
  }
})();