Snippets to get the downvoting power of an user for dsteem and steem-js

Hello,

If you are unfamiliar with steemsnippets I encourage you to read the genesis post : @howo/introducting-steemsnippets

And to check out the repository : https://github.com/drov0/steemsnippets

Since hard fork 21 is out, I see a ton of downvotes, which is great, and I suppose that you will grow tired of manually downvoting, so here's a few snippets to allow you to calculate the remaining downvoting power of an user.

the logic is similar in dsteem and steem-js so I'll only post the dsteem version on the chain :

function get_downvoting_power(username) {

    return new Promise(async resolve => {
        let account = await client.database.getAccounts([username]);

        account = account[0];

        const totalShares = parseFloat(account.vesting_shares) + parseFloat(account.received_vesting_shares) - parseFloat(account.delegated_vesting_shares) - parseFloat(account.vesting_withdraw_rate);

        const elapsed = Math.floor(Date.now() / 1000) - account.downvote_manabar.last_update_time;
        const maxMana = totalShares * 1000000 / 4;
        // 432000 sec = 5 days
        let currentMana = parseFloat(account.downvote_manabar.current_mana) + elapsed * maxMana / 432000;

        if (currentMana > maxMana) {
            currentMana = maxMana;
        }

        const currentManaPerc = currentMana * 100 / maxMana;

        return resolve(currentManaPerc);
    });
}

// example
async function test()
{
    console.log(await  get_downvoting_power("howo"));
}

test();

If you'd rather read them with colors here are the github links :

dsteem :

https://github.com/drov0/steemsnippets/tree/master/dsteem/get_downvoting_power

steem-js :

https://github.com/drov0/steemsnippets/tree/master/steemjs/downvoting_power

That's it for today :)

newsteem on !

@howo