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batchConnect.js
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batchConnect.js
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'use strict';
const bcPrefix = 'batch_connect_session_context';
const shortNameRex = new RegExp(`${bcPrefix}_([\\w\\-]+)`);
const tokenRex = /([A-Z][a-z]+){1}([\w\-]+)/;
// @example ['NodeType', 'Cluster']
const formTokens = [];
// simple lookup table to indicate that the change handler is setup between two
// elements. I.e., {'cluster': [ 'node_type' ] } means that changes to cluster
// trigger changes to node_type
const optionForHandlerCache = {};
// simples array of string ids for elements that have a handler
const minMaxHandlerCache = [];
const setHandlerCache = [];
const hideHandlerCache = [];
// Lookup tables for setting min & max values
// for different directives.
const minMaxLookup = {};
const setValueLookup = {};
const hideLookup = {};
function bcElement(name) {
return `${bcPrefix}_${name.toLowerCase()}`;
};
// here the simple name for 'batch_connect_session_context_cluster'
// is just 'cluster'.
function shortId(elementId) {
const match = elementId.match(shortNameRex);
if (match.length >= 1) {
return match[1];
} else {
return '';
};
};
/**
* Mountain case the words from a string, by tokenizing on [-_]. In the
* simplest case it simple capitalizes.
*
* @param {string} str The word string to capitalize
*
* @example given 'foo' this returns 'Foo'
* @example given 'foo-bar' this returns 'FooBar'
*/
function mountainCaseWords(str) {
let camelCase = "";
let capitalize = true;
str.split('').forEach((c) => {
if (capitalize) {
camelCase += c.toUpperCase();
capitalize = false;
} else if(c == '-' || c == '_') {
capitalize = true;
} else {
camelCase += c;
}
});
return camelCase;
}
function snakeCaseWords(str) {
if(str === undefined) return undefined;
let snakeCase = "";
let first = true;
str.split('').forEach((c) => {
if (first) {
first = false;
snakeCase += c.toLowerCase();
} else if(c === '-' || c === '_') {
snakeCase += '_';
} else if(c == c.toUpperCase() && !(c >= '0' && c <= '9')) {
snakeCase += `_${c.toLowerCase()}`;
} else {
snakeCase += c;
}
});
return snakeCase;
}
/**
*
* @param {Array} elements
*/
function memorizeElements(elements) {
elements.each((_i, ele) => {
formTokens.push(mountainCaseWords(shortId(ele['id'])));
optionForHandlerCache[ele['id']] = [];
});
};
function makeChangeHandlers(){
const allElements = $(`[id^=${bcPrefix}]`);
memorizeElements(allElements);
allElements.each((_i, element) => {
if (element['type'] == "select-one"){
let optionSearch = `#${element['id']} option`;
let options = $(optionSearch);
options.each((_i, opt) => {
// the variable 'opt' is just a data structure, not a jQuery result.
// it has no attr, data, show or hide methods so we have to query
// for it again
let data = $(`${optionSearch}[value='${opt.value}']`).data();
let keys = Object.keys(data);
if(keys.length !== 0) {
keys.forEach((key) => {
if(key.startsWith('optionFor')) {
let token = key.replace(/^optionFor/,'');
addOptionForHandler(idFromToken(token), element['id']);
} else if(key.startsWith('max') || key.startsWith('min')) {
addMinMaxForHandler(element['id'], opt.value, key, data[key]);
} else if(key.startsWith('set')) {
addSetHandler(element['id'], opt.value, key, data[key]);
} else if(key.startsWith('hide')) {
addHideHandler(element['id'], opt.value, key, data[key]);
}
});
}
});
}
});
};
function addHideHandler(optionId, option, key, configValue) {
const changeId = idFromToken(key.replace(/^hide/,''));
if(hideLookup[optionId] === undefined) hideLookup[optionId] = new Table(changeId, undefined);
const table = hideLookup[optionId];
table.put(option, undefined, configValue);
if(!hideHandlerCache.includes(optionId)) {
const changeElement = $(`#${optionId}`);
changeElement.on('change', (event) => {
updateVisibility(event, changeId);
});
hideHandlerCache.push(optionId);
}
updateVisibility({ target: document.querySelector(`#${optionId}`) }, changeId);
}
/**
*
* @param {*} optionId batch_connect_session_context_node_type
* @param {*} option gpu
* @param {*} key maxNumCoresForClusterAnnieOakley
* @param {*} configValue 42
*
* node_type:
* widget: select
* options:
* - [
* 'gpu',
* data-max-num-cores-for-cluster-annie-oakley: 42
* ]
*/
function addMinMaxForHandler(optionId, option, key, configValue) {
optionId = String(optionId || '');
const configObj = parseMinMaxFor(key);
const id = configObj['subjectId'];
// this is the id of the target object we're setting the min/max for.
// if it's undefined - there's nothing to do, it was likely configured wrong.
if(id === undefined) return;
const secondDimId = configObj['predicateId'];
const secondDimValue = configObj['predicateValue'];
if(minMaxLookup[id] === undefined) minMaxLookup[id] = new Table(optionId, secondDimId);
const table = minMaxLookup[id];
table.put(option, secondDimValue, {[minOrMax(key)] : configValue });
let cacheKey = `${optionId}_${secondDimId}`;
if(!minMaxHandlerCache.includes(cacheKey)) {
const changeElement = $(`#${optionId}`);
changeElement.on('change', (event) => {
toggleMinMax(event, id, secondDimId);
});
minMaxHandlerCache.push(cacheKey);
}
cacheKey = `${secondDimId}_${optionId}`;
if(secondDimId !== undefined && !minMaxHandlerCache.includes(cacheKey)){
const secondEle = $(`#${secondDimId}`);
secondEle.on('change', (event) => {
toggleMinMax(event, id, optionId);
});
minMaxHandlerCache.push(cacheKey);
}
}
/**
*
* @param {*} optionId batch_connect_session_context_classroom
* @param {*} option 'PHY_9000'
* @param {*} key setAccount
* @param {*} configValue 'phy3005'
*
* classroom:
* widget: select
* options:
* - [
* 'Physics Maximum', 'PHY_9000',
* data-set-account: 'phy3005'
* ]
*/
function addSetHandler(optionId, option, key, configValue) {
const k = key.replace(/^set/,'');
const id = String(idFromToken(k));
if(id === 'undefined') return;
// id is account. optionId is classroom
let cacheKey = `${id}_${optionId}`
if(setValueLookup[cacheKey] === undefined) setValueLookup[cacheKey] = new Table(optionId, undefined);
const table = setValueLookup[cacheKey];
table.put(option, undefined, configValue);
if(!setHandlerCache.includes(cacheKey)) {
const changeElement = $(`#${optionId}`);
changeElement.on('change', (event) => {
setValue(event, id);
});
setHandlerCache.push(cacheKey);
}
setValue({ target: document.querySelector(`#${optionId}`) }, id);
}
function setValue(event, changeId) {
const chosenVal = event.target.value;
const cacheKey = `${changeId}_${event.target['id']}`
const table = setValueLookup[cacheKey];
if (table === undefined) return;
const changeVal = table.get(chosenVal, undefined);
if(changeVal !== undefined) {
const innerElement = $(`#${changeId}`);
innerElement.attr('value', changeVal);
innerElement.val(changeVal);
}
}
/**
*
* This is a simple table class to describe the relationship between
* two different element types as a table with named columns.
*
* table.get('gpu','owens') would return the value shown.
*
* 'oakley' | | |
* 'owens' | { min: 3, max: 42} | |
* | 'gpu' | 'hugemem' |
*
* In the simple case, it's a 1d vector instead of a 2d matrix. This
* allows for, say, gpu to have the same min & max across clusters.
*/
class Table {
constructor(x, y) {
// FIXME: probably need to make Vector class? Wouldn't want to add a flag to the constructor.
// we don't use x or y internally, though x is used externally.
this.x = x;
this.xIdxLookup = {};
this.y = y;
this.yIdxLookup = {};
this.table = y === undefined ? [] : [[]];
}
put(x, y, value) {
if(!x) return;
x = snakeCaseWords(x);
y = snakeCaseWords(y);
if(this.xIdxLookup[x] === undefined) this.xIdxLookup[x] = Object.keys(this.xIdxLookup).length;
if(y && this.yIdxLookup[y] === undefined) this.yIdxLookup[y] = Object.keys(this.yIdxLookup).length;
const xIdx = this.xIdxLookup[x];
const yIdx = this.yIdxLookup[y];
if(this.table[xIdx] === undefined ){
this.table[xIdx] = y === undefined ? undefined : [];
}
// if y's index is defined, then it's a 2d matrix. Otherwise a 1d vector.
if(yIdx === undefined) {
if(this.table[xIdx] === undefined){
this.table[xIdx] = value;
} else {
const prev = this.table[xIdx];
const newer = value;
this.table[xIdx] = Object.assign(prev, newer);
}
} else {
if(this.table[xIdx][yIdx] === undefined){
this.table[xIdx][yIdx] = value;
} else {
const prev = this.table[xIdx][yIdx];
const newer = value;
this.table[xIdx][yIdx] = Object.assign(prev, newer);
}
}
}
get(x, y) {
const xIdx = this.xIdxLookup[snakeCaseWords(x)];
const yIdx = this.yIdxLookup[snakeCaseWords(y)];
if(this.table[xIdx] === undefined){
return undefined;
}else if(y === undefined){
return this.table[xIdx];
}else {
return this.table[xIdx][yIdx];
}
}
}
/**
* Update the visibility of `changeId` based on the
* event and what's in the hideLookup table.
*/
function updateVisibility(event, changeId) {
const val = event.target.value;
const id = event.target['id'];
const changeElement = $(`#${changeId}`).parent();
if (changeElement.size() <= 0) return;
// safe to access directly?
const hide = hideLookup[id].get(val, undefined);
if(hide === undefined) {
changeElement.show();
}else if(hide === true) {
changeElement.hide();
}
}
function toggleMinMax(event, changeId, otherId) {
let x = undefined, y = undefined;
// in the example of cluster & node_type, either element can trigger a change
// so let's figure out the axis' based on the change element's id.
if(event.target['id'] == minMaxLookup[changeId].x) {
x = snakeCaseWords(event.target.value);
y = snakeCaseWords($(`#${otherId}`).val());
} else {
y = snakeCaseWords(event.target.value);
x = snakeCaseWords($(`#${otherId}`).val());
}
const changeElement = $(`#${changeId}`);
const mm = minMaxLookup[changeId].get(x, y);
const prev = {
min: changeElement.attr('min'),
max: changeElement.attr('max'),
val: changeElement.val()
};
[ 'max', 'min' ].forEach((dim) => {
if(mm && mm[dim] !== undefined) {
changeElement.attr(dim, mm[dim]);
let val = clamp(prev['val'], prev[dim], mm[dim], dim)
if (val !== undefined) {
changeElement.attr('value', val);
changeElement.val(val);
}
}
});
}
function clamp(previous, previousBoundary, currentBoundary, comparator){
const pb = parseInt(previousBoundary) || undefined;
const p = parseInt(previous) || undefined;
if(comparator == 'min' && p <= pb) {
return currentBoundary;
} else if(comparator == 'max' && p >= pb) {
return currentBoundary;
} else {
return undefined;
}
}
function addOptionForHandler(causeId, targetId) {
const changeId = String(causeId || '');
if(changeId.length == 0 || optionForHandlerCache[causeId].includes(targetId)) {
// nothing to do. invalid causeId or we already have a handler between the 2
return;
}
let causeElement = $(`#${causeId}`);
if(targetId && causeElement) {
// cache the fact that there's a new handler here
optionForHandlerCache[causeId].push(targetId);
causeElement.on('change', (event) => {
toggleOptionsFor(event, targetId);
});
// fake an event to initialize
toggleOptionsFor({ target: document.querySelector(`#${causeId}`) }, targetId);
}
};
/**
*
* @param {*} key minNumCoresForClusterAnnieOakley
* @returns
*
* {
* 'subjectId': 'batch_connect_session_context_num_cores',
* 'predicateId': 'batch_connect_session_context_cluster',
* 'predicateValue': 'annie_oakley'
* }
*/
function parseMinMaxFor(key) {
let k = undefined;
let predicateId = undefined;
let predicateValue = undefined;
let subjectId = undefined;
if(key.startsWith('min')) {
k = key.replace(/^min/,'');
} else if(key.startsWith('max')) {
k = key.replace(/^max/, '')
}
//trying to parse maxNumCoresForClusterOwens
const tokens = k.match(/^(\w+)For(\w+)$/);
if(tokens == null) {
// the key is likely just maxNumCores with no For clause
subjectId = idFromToken(k);
} else if(tokens.length == 3) {
const subject = tokens[1];
const predicateFull = tokens[2];
subjectId = idFromToken(subject);
const predicateTokens = predicateFull.split(/(?=[A-Z])/);
if(predicateTokens && predicateTokens.length >= 2) {
// if there are only 2 tokens then it's like 'ClusterOwens' which is easy
if(predicateTokens.length == 2) {
predicateId = idFromToken(predicateTokens[0]);
predicateValue = predicateTokens[1];
// else it's like NodeTypeFooBar, so it's a little more difficult
} else {
let tokenString = '';
let done = false;
predicateTokens.forEach((pt, idx) => {
if(done) { return; }
tokenString = `${tokenString}${pt}`
let tokenId = idFromToken(tokenString);
if(tokenId !== undefined) {
done = true;
predicateId = tokenId;
predicateValue = predicateTokens.slice(idx+1).join('');
}
})
}
}
}
return {
'subjectId': subjectId,
'predicateId': predicateId,
'predicateValue': snakeCaseWords(predicateValue),
}
}
function minOrMax(key) {
if(key.startsWith('min')){
return 'min';
} else if(key.startsWith('max')){
return 'max';
} else {
return null;
}
}
/**
* Turn a MountainCase token into a form element id
*
* @example
* NodeType -> batch_connect_session_context_node_type
*
* @param {*} str
* @returns
*/
function idFromToken(str) {
return formTokens.map((token) => {
let match = str.match(`^${token}{1}`);
if (match && match.length >= 1) {
let ele = snakeCaseWords(match[0]);
return bcElement(ele);
}
}).filter((id) => {
return id !== undefined;
})[0];
}
/**
* Hide or show options of an element based on which cluster is
* currently selected and the data-option-for-CLUSTER attributes
* for each option
*
* @param {string} element_name The name of the element with options to toggle
*/
function toggleOptionsFor(event, elementId) {
const options = $(`#${elementId} option`);
// If I'm changing cluster to 'oakely', optionFor is 'Cluster'
// and optionTo is 'Oakley'.
const optionTo = mountainCaseWords(event.target.value);
const optionFor = optionForEvent(event.target);
options.each(function(_i, option) {
// the variable 'option' is just a data structure. it has no attr, data, show
// or hide methods so we have to query for it again
let optionElement = $(`#${elementId} option[value='${option.value}']`);
let data = optionElement.data();
let hide = data[`optionFor${optionFor}${optionTo}`] === false;
if(hide) {
optionElement.hide();
if(optionElement.prop('selected')) {
optionElement.prop('selected', false);
// when de-selecting something, the default is to fallback to the very first
// option. But there's an edge case where you want to hide the very first option,
// and deselecting it does nothing.
if(optionElement.next()){
optionElement.next().prop('selected', true);
}
}
} else {
optionElement.show();
}
});
};
function optionForEvent(target) {
let simpleName = shortId(target['id']);
return mountainCaseWords(simpleName);
};
jQuery(function() {
makeChangeHandlers();
});