mirror of
https://github.com/titanscouting/tra-analysis.git
synced 2024-11-10 15:04:45 +00:00
414 lines
11 KiB
JavaScript
414 lines
11 KiB
JavaScript
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'use strict';
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var typeName = require('type-name');
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var forEach = require('core-js/library/fn/array/for-each');
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var arrayFilter = require('core-js/library/fn/array/filter');
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var reduceRight = require('core-js/library/fn/array/reduce-right');
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var indexOf = require('core-js/library/fn/array/index-of');
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var slice = Array.prototype.slice;
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var END = {};
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var ITERATE = {};
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// arguments should end with end or iterate
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function compose () {
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var filters = slice.apply(arguments);
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return reduceRight(filters, function(right, left) {
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return left(right);
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});
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}
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// skip children
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function end () {
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return function (acc, x) {
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acc.context.keys = [];
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return END;
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};
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}
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// iterate children
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function iterate () {
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return function (acc, x) {
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return ITERATE;
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};
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}
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function filter (predicate) {
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return function (next) {
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return function (acc, x) {
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var toBeIterated;
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var isIteratingArray = (typeName(x) === 'Array');
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if (typeName(predicate) === 'function') {
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toBeIterated = [];
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forEach(acc.context.keys, function (key) {
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var indexOrKey = isIteratingArray ? parseInt(key, 10) : key;
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var kvp = {
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key: indexOrKey,
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value: x[key]
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};
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var decision = predicate(kvp);
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if (decision) {
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toBeIterated.push(key);
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}
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if (typeName(decision) === 'number') {
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truncateByKey(decision, key, acc);
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}
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if (typeName(decision) === 'function') {
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customizeStrategyForKey(decision, key, acc);
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}
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});
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acc.context.keys = toBeIterated;
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}
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return next(acc, x);
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};
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};
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}
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function customizeStrategyForKey (strategy, key, acc) {
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acc.handlers[currentPath(key, acc)] = strategy;
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}
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function truncateByKey (size, key, acc) {
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acc.handlers[currentPath(key, acc)] = size;
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}
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function currentPath (key, acc) {
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var pathToCurrentNode = [''].concat(acc.context.path);
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if (typeName(key) !== 'undefined') {
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pathToCurrentNode.push(key);
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}
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return pathToCurrentNode.join('/');
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}
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function allowedKeys (orderedWhiteList) {
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return function (next) {
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return function (acc, x) {
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var isIteratingArray = (typeName(x) === 'Array');
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if (!isIteratingArray && typeName(orderedWhiteList) === 'Array') {
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acc.context.keys = arrayFilter(orderedWhiteList, function (propKey) {
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return x.hasOwnProperty(propKey);
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});
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}
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return next(acc, x);
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};
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};
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}
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function safeKeys () {
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return function (next) {
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return function (acc, x) {
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if (typeName(x) !== 'Array') {
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acc.context.keys = arrayFilter(acc.context.keys, function (propKey) {
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// Error handling for unsafe property access.
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// For example, on PhantomJS,
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// accessing HTMLInputElement.selectionEnd causes TypeError
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try {
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var val = x[propKey];
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return true;
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} catch (e) {
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// skip unsafe key
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return false;
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}
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});
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}
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return next(acc, x);
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};
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};
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}
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function arrayIndicesToKeys () {
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return function (next) {
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return function (acc, x) {
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if (typeName(x) === 'Array' && 0 < x.length) {
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var indices = Array(x.length);
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for(var i = 0; i < x.length; i += 1) {
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indices[i] = String(i); // traverse uses strings as keys
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}
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acc.context.keys = indices;
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}
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return next(acc, x);
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};
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};
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}
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function when (guard, then) {
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return function (next) {
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return function (acc, x) {
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var kvp = {
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key: acc.context.key,
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value: x
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};
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if (guard(kvp, acc)) {
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return then(acc, x);
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}
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return next(acc, x);
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};
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};
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}
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function truncate (size) {
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return function (next) {
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return function (acc, x) {
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var orig = acc.push;
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var ret;
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acc.push = function (str) {
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var savings = str.length - size;
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var truncated;
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if (savings <= size) {
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orig.call(acc, str);
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} else {
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truncated = str.substring(0, size);
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orig.call(acc, truncated + acc.options.snip);
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}
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};
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ret = next(acc, x);
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acc.push = orig;
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return ret;
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};
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};
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}
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function constructorName () {
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return function (next) {
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return function (acc, x) {
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var name = acc.options.typeFun(x);
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if (name === '') {
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name = acc.options.anonymous;
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}
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acc.push(name);
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return next(acc, x);
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};
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};
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}
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function always (str) {
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return function (next) {
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return function (acc, x) {
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acc.push(str);
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return next(acc, x);
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};
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};
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}
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function optionValue (key) {
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return function (next) {
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return function (acc, x) {
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acc.push(acc.options[key]);
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return next(acc, x);
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};
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};
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}
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function json (replacer) {
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return function (next) {
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return function (acc, x) {
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acc.push(JSON.stringify(x, replacer));
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return next(acc, x);
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};
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};
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}
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function toStr () {
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return function (next) {
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return function (acc, x) {
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acc.push(x.toString());
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return next(acc, x);
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};
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};
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}
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function decorateArray () {
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return function (next) {
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return function (acc, x) {
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acc.context.before(function (node) {
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acc.push('[');
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});
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acc.context.after(function (node) {
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afterAllChildren(this, acc.push, acc.options);
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acc.push(']');
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});
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acc.context.pre(function (val, key) {
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beforeEachChild(this, acc.push, acc.options);
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});
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acc.context.post(function (childContext) {
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afterEachChild(childContext, acc.push);
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});
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return next(acc, x);
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};
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};
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}
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function decorateObject () {
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return function (next) {
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return function (acc, x) {
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acc.context.before(function (node) {
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acc.push('{');
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});
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acc.context.after(function (node) {
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afterAllChildren(this, acc.push, acc.options);
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acc.push('}');
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});
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acc.context.pre(function (val, key) {
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beforeEachChild(this, acc.push, acc.options);
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acc.push(sanitizeKey(key) + (acc.options.indent ? ': ' : ':'));
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});
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acc.context.post(function (childContext) {
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afterEachChild(childContext, acc.push);
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});
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return next(acc, x);
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};
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};
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}
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function sanitizeKey (key) {
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return /^[A-Za-z_]+$/.test(key) ? key : JSON.stringify(key);
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}
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function afterAllChildren (context, push, options) {
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if (options.indent && 0 < context.keys.length) {
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push(options.lineSeparator);
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for(var i = 0; i < context.level; i += 1) { // indent level - 1
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push(options.indent);
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}
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}
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}
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function beforeEachChild (context, push, options) {
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if (options.indent) {
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push(options.lineSeparator);
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for(var i = 0; i <= context.level; i += 1) {
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push(options.indent);
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}
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}
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}
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function afterEachChild (childContext, push) {
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if (!childContext.isLast) {
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push(',');
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}
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}
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function nan (kvp, acc) {
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return kvp.value !== kvp.value;
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}
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function positiveInfinity (kvp, acc) {
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return !isFinite(kvp.value) && kvp.value === Infinity;
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}
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function negativeInfinity (kvp, acc) {
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return !isFinite(kvp.value) && kvp.value !== Infinity;
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}
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function circular (kvp, acc) {
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return acc.context.circular;
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}
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function maxDepth (kvp, acc) {
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return (acc.options.maxDepth && acc.options.maxDepth <= acc.context.level);
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}
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var prune = compose(
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always('#'),
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constructorName(),
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always('#'),
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end()
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);
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var omitNaN = when(nan, compose(
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always('NaN'),
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end()
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));
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var omitPositiveInfinity = when(positiveInfinity, compose(
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always('Infinity'),
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end()
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));
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var omitNegativeInfinity = when(negativeInfinity, compose(
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always('-Infinity'),
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end()
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));
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var omitCircular = when(circular, compose(
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optionValue('circular'),
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end()
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));
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var omitMaxDepth = when(maxDepth, prune);
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module.exports = {
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filters: {
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always: always,
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optionValue: optionValue,
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constructorName: constructorName,
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json: json,
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toStr: toStr,
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prune: prune,
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truncate: truncate,
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decorateArray: decorateArray,
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decorateObject: decorateObject
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},
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flow: {
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compose: compose,
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when: when,
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allowedKeys: allowedKeys,
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safeKeys: safeKeys,
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arrayIndicesToKeys: arrayIndicesToKeys,
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filter: filter,
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iterate: iterate,
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end: end
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},
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symbols: {
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END: END,
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ITERATE: ITERATE
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},
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always: function (str) {
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return compose(always(str), end());
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},
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json: function () {
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return compose(json(), end());
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},
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toStr: function () {
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return compose(toStr(), end());
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},
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prune: function () {
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return prune;
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},
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number: function () {
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return compose(
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omitNaN,
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omitPositiveInfinity,
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omitNegativeInfinity,
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json(),
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end()
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);
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},
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newLike: function () {
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return compose(
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always('new '),
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constructorName(),
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always('('),
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json(),
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always(')'),
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end()
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);
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},
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array: function (predicate) {
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return compose(
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omitCircular,
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omitMaxDepth,
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decorateArray(),
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arrayIndicesToKeys(),
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filter(predicate),
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iterate()
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);
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},
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object: function (predicate, orderedWhiteList) {
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return compose(
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omitCircular,
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omitMaxDepth,
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constructorName(),
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decorateObject(),
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allowedKeys(orderedWhiteList),
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safeKeys(),
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filter(predicate),
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iterate()
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);
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}
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};
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