GetBlock.js

/*
* Dependency:
* <script src="https://unpkg.com/dsteem@^0.8.0/dist/dsteem.js"></script>
* Return block from dsteem API given the date/time of the block.
* Uses a block anchor (known value) to extrapolate data.
* dateTime string example: "2018-10-03T00:32:45"
* Overloaded to accept integer block_num.
*/
var client = new dsteem.Client('https://api.steemit.com')
var BLOCKS_PER_SECOND = 3
var ANCHOR_BLOCK = 26471727
var ANCHOR_DATE = new Date('2018-10-03T02:24:54'+'Z')
var recursive_counter = 0
var blocks = []
var block_nums = []

async function getBlock(dateTime){
    var block_num = getBlockNum(dateTime)
    console.log(block_num);
    client.database.call('get_block',
            [block_num]).then(function(block){
        if(check(block, dateTime)){
             blocks.unshift(block)
             block_nums.unshift(block_num)
             console.log(block);
             recursive_counter = 0
             findAuthor(block_num, 'atempt')
        } else {
            ANCHOR_BLOCK = block_num
            ANCHOR_DATE = new Date(block.timestamp+'Z')
            recursive_counter++
            if(recursive_counter < 6)
                getBlock(dateTime)
            else {
                console.log("Block " + dateTime + " not found.")

            }
        }
    })
}

function getBlockNum(dateTime){
    /*
    * This fuctionion guesses which block we need to retrieve.
    * The more missed blocks there have been in between the anchor and
    * active date the more inaccurate the guess will be.
    * Testing concludes that only 2 wrong guesses are made for requests
    * as far back as the first block.
    */
    if( !isNaN(dateTime) && !(dateTime instanceof Date)){
        return dateTime  // Overloaded to accept integer block_num.
    }
    if( !(dateTime instanceof Date) ){
        dateTime += 'Z' // UTC conversion.
        var date = new Date(dateTime)
    } else {
        var date = dateTime
    }
    var deltaBlocks = (date - ANCHOR_DATE) / 1000 / BLOCKS_PER_SECOND
    var block_num = parseInt(ANCHOR_BLOCK + deltaBlocks)
    if(block_num < 1) return 1;
    return block_num
}

function check(block, dateTime){
    /*
    * This function checks to see if we got the right block.
    * The date of the block must match the date given.
    */
    if( !isNaN(dateTime) )
        return true
    if(block.timestamp === dateTime.slice(0, 19))
         return true
    else return false
}

function findAuthor(block_num, author){
    //console.log('attempting');
    //block_num = 26585709
    client.database.call('get_ops_in_block',
            [block_num, false]).then(function(operations){
        console.log(operations);
        for(var i = 0; i < operations.length; i++){
            var operation = operations[i]
            var block_number = operation.block
            var op = operation.op
            var action = op[0] // vote, curation_reward, comment, etc
            var info = op[1] // voter, curator, author, permlink, etc
            if(         info.author === author
                    ||  info.curator === author
                    ||  info.voter === author
                    ||  info.from === author
                    ||  info.to === author
                    ||  info.account === author     ){
                console.log('Author match found at index: ' + i);
            }
            //console.log(info);
        }
    })
}

//* Testing
//getBlock("2018-10-06T23:27:21")
//getBlock("2018-10-06T10:29:45")
//getBlock("2018-10-06T22:29:57")
//getBlock("2018-09-30T19:08:57") // got: 26405440  searched: 26585709
//getBlock(26585709)
//getBlock("2018-10-07T01:28:03")
//getBlock("2018-09-30T19:08:57")
//getBlock("2018-10-07T00:51:45")
//getBlock("2018-10-06T23:27:18")
getBlock("2018-10-15T09:51:12")
//getBlock("2018-10-06T23:27:21")
//getBlock("2018-10-07T00:51:42")
//getBlock("2018-10-07T00:51:48")

/*
getBlock(2)
getBlock("2016-09-24T16:05:00")
getBlock("2016-03-24T16:05:36")
getBlock("2016-03-24T16:05:00")
getBlock("2016-03-24T16:10:30")
getBlock("2018-10-03T19:45:54")  // 26492535
getBlock("2018-10-03T20:58:09")  // 26493980
//*/

Inspect.html

<script src="https://unpkg.com/dsteem@^0.8.0/dist/dsteem.js"></script>
<!--<script src="GetBlock.js"></script>-->

Author:
<input type="text" id="author" value="edicted">
<button id="inspect_account"> Inspect Account </button><br>
<button id="inspect_history"> Inspect History </button><br>
Permlink:
<input type="text" id="permlink"
        value="steem-is-missing-a-huge-opportunity-on-twitch">
<button id="inspect_discussion"> Inspect Discussion </button><br>
<input type="number" id="block_num" value=''>
<button id="inspect_block"> Inspect Block </button><br>
<button id="inspect_operations"> Inspect Block Operations </button><br>

<p id='history'> History populates here. </p>

<script>
var client = new dsteem.Client('https://api.steemit.com')
var author = document.getElementById('author').value
var permlink = document.getElementById('permlink').value
var block_num = parseInt(document.getElementById('block_num').value)

function inspectDiscussion(){
    update()
    client.database.call('get_content',
            [author, permlink]).then(function(discussion){
        console.log(discussion)
    })
}

function inspectHistory(){
    update()
    client.database.call('get_account_history',
            [author, -1, 100]).then(function(history_results){
        console.log(history_results);
        var p = document.getElementById('history')
        p.innerHTML = ''
        for(var i = history_results.length-1; i >= 0; i--){
            var operation = history_results[i][1]
            p.innerHTML += ' <button id="' + operation.block
                    + '" onClick="importBlock(this.id)"'
                    + '>' + operation.op[0] + '</button><br>'
        }
    })
}

function importBlock(block_num){
    document.getElementById('block_num').value = parseInt(block_num)
    /*
    client.database.call('get_block_header',
            [block_num]).then(function(header){
        console.log(header);
    })
    //*/
}

function inspectOperations(){
    update()
    console.log(block_num);
    client.database.call('get_ops_in_block',
            [block_num, false]).then(function(operations){
        console.log(operations);
        for(var i = 0; i < operations.length; i++){
            var operation = operations[i]
            var block_number = operation.block
            var op = operation.op
            var action = op[0] // vote, curation_reward, comment, etc
            var info = op[1] // voter, curator, author, permlink, etc
            if(         info.author === author
                    ||  info.curator === author
                    ||  info.voter === author
                    ||  info.from === author
                    ||  info.to === author
                    ||  info.account === author     ){
                console.log('Author match found at index: ' + i);
            }
        }
    })
}

function inspectBlock(){
    update()
    console.log(block_num);
    client.database.call('get_block',
            [block_num]).then(function(block){
        console.log(block);
    })
}

function inspectAccount(){
    update()
    client.database.call('get_accounts',
            [[author]]).then(function(accounts){
        console.log(accounts);
    })
}

function update(){
    // update global variables
    author = document.getElementById('author').value
    permlink = document.getElementById('permlink').value
    block_num = parseInt(document.getElementById('block_num').value)
}

document.getElementById("inspect_discussion").onclick = inspectDiscussion;
document.getElementById("inspect_history").onclick = inspectHistory;
document.getElementById("inspect_operations").onclick = inspectOperations;
document.getElementById("inspect_block").onclick = inspectBlock;
document.getElementById("inspect_account").onclick = inspectAccount;

</script>