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parser-util.js
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218 lines (190 loc) · 4.65 KB
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/**
* sqlite-parser utilities
*/
var slice = [].slice;
export function makeArray(arr) {
return !isArray(arr) ? (isOkay(arr) ? [arr] : []) : arr;
}
export function typed(obj) {
return Object.prototype.toString.call(obj);
}
export function isPlain(obj) {
return typed(obj) === '[object Object]';
}
export function isPattern(obj) {
return typed(obj) === '[object RegExp]';
}
export function isFunc(obj) {
return typed(obj) === '[object Function]';
}
export function isString(obj) {
return typed(obj) === '[object String]';
}
export function isArray(obj) {
return Array.isArray ? Array.isArray(obj) : (typed(obj) === '[object Array]');
}
export function isOkay(obj) {
return obj != null;
}
export function collapse(arr) {
var i, len, n, obj, ref, v;
if (isArray(arr) && arr.length) {
obj = {};
for (i = 0, len = arr.length; i < len; i++) {
ref = arr[i], n = ref.name, v = ref.value;
obj[n] = v;
}
return obj;
} else {
return {};
}
}
export function compose(args, glue) {
var conc = isArray(glue), res, start = conc ? [] : '';
if (!isOkay(glue)) {
glue = ' ';
}
res = args.reduce(function (prev, cur) {
return conc ? (isOkay(cur) ? prev.concat(cur) : prev) :
(prev + (isOkay(cur) ? textCompose(cur) + glue : ''));
}, start);
return conc ? res : textNode(res);
}
export function textCompose(arg) {
return nodeToString(isArray(arg) ? arg.join('') : arg);
}
export function stack(arr) {
return (isArray(arr) ?
arr.map(function (elem) {
return elem[1];
}) : []);
}
export function nodeToString(node) {
var elem = ((isArray(node) || isString(node)) ? node : []);
if (isArray(elem)) {
if (elem.length && isArray(elem[0])) {
elem = stack(elem);
}
elem = elem.join('');
}
return elem;
}
export function textNode(elem) {
/*
* A text node has
* - no leading or trailing whitespace
*/
return nodeToString(elem).trim();
}
export function textMerge() {
return compose.call(this, slice.call(arguments, 0), '');
}
export function unescape(str, quoteChar) {
var re;
if (quoteChar == null) {
quoteChar = '\'';
}
re = new RegExp(quoteChar + '{2}', 'g');
return nodeToString(str).replace(re, quoteChar);
}
export function extend() {
var first = arguments[0],
rest = slice.call(arguments, 1);
rest.forEach(function (next) {
if (isOkay(next) && isPlain(next)) {
var key;
for (key in next) {
if (next.hasOwnProperty(key)) {
first[key] = next[key];
}
}
}
});
return first;
}
export function has(thing, item) {
var k, v, len;
if (isArray(thing)) {
if (isString(item)) {
// thing is an array, find substring item
return thing.indexOf(item) !== -1;
} else {
// thing is an array, find item in array
return findWhere(thing, item) !== undefined;
}
} else if (isPlain(thing)) {
if (isFunc(item)) {
return item(thing);
} else if (isPlain(item)) {
// item is an object, find each prop key and value in item within thing
for (k in item) {
v = item[k];
if (!(thing.hasOwnProperty(k) && thing[k] === v)) {
return false;
}
}
return true;
} else if (isArray(item)) {
// item is an array, find each string prop within thing
for (i = 0, len = item.length; i < len; i++) {
k = item[i];
if (!thing.hasOwnProperty(k)) {
return false;
}
}
return true;
} else {
// thing is an object, item is a string, find item string in thing
return thing.hasOwnProperty(item);
}
}
return false;
}
export function findWhere(arr, props) {
var i, len, val;
for (i = 0, len = arr.length; i < len; i++) {
val = arr[i];
if (has(val, props)) {
return val;
}
}
return null;
}
export function key(elem) {
return textNode(elem).toLowerCase();
}
export function keyify(arr, glue) {
return key(compose(arr, glue));
}
export function listify() {
return compose.call(this, slice.call(arguments, 0), []);
}
export function findLastIndex(arr, props) {
return findLast(arr, props, true);
}
export function findLast(arr, props, index) {
var elem, i;
for (i = arr.length - 1; i >= 0; i += -1) {
elem = arr[i];
if (has(elem, props)) {
return index ? i : elem;
}
}
return index ? -1 : null;
}
export function takeWhile(arr, func) {
var elem, i, len;
for (i = 0, len = arr.length; i < len; i++) {
elem = arr[i];
if (!func(elem)) {
break;
}
}
return arr.slice(0, i);
}
export function isArrayOkay(arr) {
if (isArray(arr)) {
return arr.length > 0 && isOkay(arr[0]);
}
return false;
}