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import _ from 'lodash'
import React from 'react'
import shallowEqual from 'shallowequal'
window._ = _;
window.React = React;
export var Key = {
UP: 38,
DOWN: 40,
PAGE_UP: 33,
PAGE_DOWN: 34,
HOME: 36,
END: 35,
LEFT: 37,
RIGHT: 39,
ENTER: 13,
ESC: 27,
TAB: 9,
SPACE: 32,
BACKSPACE: 8,
SHIFT: 16
};
// Add A-Z
for (var i = 65; i <= 90; i++) {
Key[String.fromCharCode(i)] = i;
}
export var formatSize = function (bytes) {
if (bytes === 0)
return "0";
var prefix = ["b", "kb", "mb", "gb", "tb"];
for (var i = 0; i < prefix.length; i++) {
if (Math.pow(1024, i + 1) > bytes) {
break;
}
}
var precision;
if (bytes % Math.pow(1024, i) === 0)
precision = 0;
else
precision = 1;
return (bytes / Math.pow(1024, i)).toFixed(precision) + prefix[i];
};
export var formatTimeDelta = function (milliseconds) {
var time = milliseconds;
var prefix = ["ms", "s", "min", "h"];
var div = [1000, 60, 60];
var i = 0;
while (Math.abs(time) >= div[i] && i < div.length) {
time = time / div[i];
i++;
}
return Math.round(time) + prefix[i];
};
export var formatTimeStamp = function (seconds) {
var ts = (new Date(seconds * 1000)).toISOString();
return ts.replace("T", " ").replace("Z", "");
};
// At some places, we need to sort strings alphabetically descending,
// but we can only provide a key function.
// This beauty "reverses" a JS string.
var end = String.fromCharCode(0xffff);
export function reverseString(s) {
return String.fromCharCode.apply(String,
_.map(s.split(""), function (c) {
return 0xffff - c.charCodeAt(0);
})
) + end;
}
function getCookie(name) {
var r = document.cookie.match(new RegExp("\\b" + name + "=([^;]*)\\b"));
return r ? r[1] : undefined;
}
const xsrf = `_xsrf=${getCookie("_xsrf")}`;
export function fetchApi(url, options={}) {
if (options.method && options.method !== "GET") {
if (url.indexOf("?") === -1) {
url += "?" + xsrf;
} else {
url += "&" + xsrf;
}
} else {
url += '.json'
}
return fetch(url, {
credentials: 'same-origin',
...options
});
}
fetchApi.put = (url, json, options) => fetchApi(
url,
{
method: "PUT",
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(json),
...options
}
)
// deep comparison of two json objects (dicts). arrays are handeled as a single value.
// return: json object including only the changed keys value pairs.
export function getDiff(obj1, obj2) {
let result = {...obj2};
for(let key in obj1) {
if(_.isEqual(obj2[key], obj1[key]))
result[key] = undefined
else if(Object.prototype.toString.call(obj2[key]) === '[object Object]' &&
Object.prototype.toString.call(obj1[key]) === '[object Object]' )
result[key] = getDiff(obj1[key], obj2[key])
}
return result
}
export const pure = renderFn => class extends React.Component {
static displayName = renderFn.name
shouldComponentUpdate(nextProps) {
return !shallowEqual(this.props, nextProps)
}
render() {
return renderFn(this.props)
}
}
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