Created
August 7, 2018 19:41
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/* eslint-disable no-console */ | |
/* eslint-disable no-undef */ | |
window.client = (function () { | |
function getTiles(success) { | |
return fetch('/api/tiles', { | |
headers: { | |
Accept: 'application/json', | |
}, | |
}).then(checkStatus) | |
.then(parseJSON) | |
.then(shuffle) | |
.then(success); | |
} | |
function updateMoves(tiles, emptyTile) { | |
return setMoves(tiles, emptyTile); | |
} | |
function getSolution(success) { | |
return fetch('/api/tiles/solution', { | |
headers: { | |
Accept: 'application/json', | |
}, | |
}).then(checkStatus) | |
.then(parseJSON) | |
.then(success); | |
} | |
function checkStatus(response) { | |
if (response.status >= 200 && response.status < 300) { | |
return response; | |
} else { | |
const error = new Error(`HTTP Error ${response.statusText}`); | |
error.status = response.statusText; | |
error.response = response; | |
console.log(error); | |
throw error; | |
} | |
} | |
function parseJSON(response) { | |
return response.json(); | |
} | |
function shuffle(array) { | |
var currentIndex = array.length, temporaryValue, randomIndex; | |
var emptyTile = {}; | |
// While there remain elements to shuffle.. | |
while (0 !== currentIndex) { | |
// Pick a remaining element... | |
randomIndex = Math.floor(Math.random() * currentIndex); | |
currentIndex -= 1; | |
// And swap it with the current element. | |
temporaryValue = array[currentIndex]; | |
array[currentIndex] = array[randomIndex]; | |
array[randomIndex] = temporaryValue; | |
// catch empty tile | |
if (array[randomIndex]["empty"]) { | |
emptyTile = array[randomIndex]; | |
} | |
} | |
array = setColumns(array); | |
array = setMoves(array, emptyTile); | |
return array; | |
} | |
function setMoves(array, emptyTile) { | |
var movable = getMovablePositions(emptyTile); | |
return array.map((tile) => { | |
var position = tile.col + tile.row; | |
if (movable.includes(position)) { | |
tile.canMove = true; | |
} | |
return tile; | |
}); | |
} | |
function setColumns(array) { | |
array.map((tile, index) => { | |
// set column value | |
if (index < 4) { | |
tile["col"] = "a"; | |
} else if (index < 8) { | |
tile["col"] = "b"; | |
} else if (index < 12) { | |
tile["col"] = "c"; | |
} else { | |
tile["col"] = "d"; | |
} | |
tile["row"] = getNextRow(array, tile["col"]); | |
array[index] = tile; | |
}); | |
return array; | |
} | |
function getNextRow(tiles, column) | |
{ | |
var count = 0; | |
tiles.map((tile) => { | |
if (tile.col == column) { | |
count++; | |
} | |
}); | |
return count; | |
} | |
function getActiveRows(row) { | |
var possibleRows = [ 1, 2, 3, 4 ]; | |
var actualRows = [ row - 1, row, row + 1 ]; | |
return possibleRows.filter(row => actualRows.includes(row)); | |
} | |
function getActiveColumns(column) { | |
var possibleCols = [ "a", "b", "c", "d" ]; | |
var index = possibleCols.indexOf(column); | |
var actualCols = [ | |
possibleCols[index - 1], | |
column, | |
possibleCols[index + 1] | |
]; | |
return possibleCols.filter(columnName => actualCols.includes(columnName)); | |
} | |
function getMovablePositions(emptyTile) { | |
var rows = getActiveRows(emptyTile.row); | |
var columns = getActiveColumns(emptyTile.col); | |
var movablePositions = []; | |
columns.filter((colName) => { | |
if (colName == emptyTile.col) { | |
rows.map((each) => { | |
movablePositions.push(colName + each); | |
}); | |
} else { | |
movablePositions.push(colName + emptyTile.row); | |
} | |
}); | |
return movablePositions.filter(position => position != emptyTile.col + emptyTile.row); | |
} | |
return { | |
getTiles, | |
getSolution, | |
updateMoves | |
}; | |
}()); |
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