Created
September 13, 2019 15:42
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AngularJS directive wrapper for VueJS components
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import Vue from 'vue' | |
// the list of vue components to install | |
import components from './vueComponents' | |
class SlVueWrapper { | |
constructor($timeout) { | |
this.name = 'vue'; | |
this.restrict = 'A'; | |
this.terminal = true; | |
this.priority = 9999; | |
this.compile = function directive(elem) { | |
// prevents angular to update vue content | |
elem[0].setAttribute('ng-non-bindable', ''); | |
// load vue components | |
function getRequiredComponents(){ | |
var requiredComponents = {}; | |
var tagNames = extractNestedComponentsTagNames(elem[0].outerHTML); | |
for(var index in tagNames){ | |
requiredComponents[tagNames[index]] = components[tagNames[index]]; | |
} | |
return requiredComponents; | |
} | |
// extract from html code the nested vue components to load | |
function extractNestedComponentsTagNames(html){ | |
let components = html.match(/<sl-.+? /g); | |
return components.map(function(tag){ | |
return tag.replace('<', '').replace(' ', '') | |
}); | |
} | |
return { | |
pre: function(scope, elem, attrs){ | |
// all the methods to provide to vue | |
var methods = {}; | |
// all the data to provide to vue | |
var data = {}; | |
// all the watchers to provide to vue | |
var watchers = {}; | |
// register attributes from element | |
for(let key in attrs){ | |
if(!isValidAttribute(key, attrs[key])){ | |
continue; | |
} | |
if(key.indexOf('@') === 0){ | |
registerEvent(key, attrs[key]); | |
} | |
if(scope[attrs[key]] !== undefined){ | |
// register simple variables | |
registerInScope(attrs[key]); | |
}else{ | |
// register variables inside complex expressions | |
if(typeof attrs[key] == 'string'){ | |
var expressionElements = extractVariablesFromExpression(attrs[key]); | |
for(let variable in expressionElements){ | |
registerInScope(expressionElements[variable]); | |
} | |
} | |
} | |
} | |
// register `{{x}}` from children element | |
let html = elem[0].innerHTML; | |
let extractedValues = html.match(/\{\{(.+?)\}\}/g); | |
for(let value in extractedValues){ | |
registerInScope(extractedValues[value].replace(/\{|\}|\s/g, '')); | |
} | |
// register `="x"` from children element | |
let extractedAttributes = html.match(/=\s*"(.+?)"/g); | |
for(let value in extractedAttributes){ | |
registerInScope(extractedAttributes[value].replace(/"|=|\s/g, '')); | |
} | |
// watch in vue for changes and update angular (for v-model and .sync components) | |
function buildVueWatchers(data){ | |
for(let key in data){ | |
watchers[key] = { | |
handler: function(value){ | |
$timeout(function(){ | |
scope[key] = value; | |
}) | |
}, | |
deep:true | |
} | |
} | |
} | |
// watch in angular for changes and update vue | |
function watchAngularData(data){ | |
for(var key in data){ | |
scope.$watch(key, function(value, oldValue){ | |
if(value === oldValue){return;} | |
data[key] = value; | |
}, true) | |
} | |
} | |
// check if an attribute contains angular scope variables | |
function isValidAttribute(attribute, value){ | |
return !(attribute.indexOf('$') == 0 || value === '' || attribute === 'class' || attribute === 'id'); | |
} | |
// propagates vue methods to angular | |
function registerEvent(key, value){ | |
methods[value] = function(...args){ | |
scope[value](...args); | |
} | |
} | |
// propagates vue methods to angular | |
function registerInScope(attribute){ | |
if(typeof scope[attribute] === 'function'){ | |
methods[attribute] = scope[attribute]; | |
}else if(scope[attribute] !== undefined){ | |
data[attribute] = scope[attribute]; | |
scope.$watch(attribute, function(value){ | |
data[attribute] = value; | |
}, true) | |
} | |
} | |
// extract variables used in angular expressions | |
function extractVariablesFromExpression(attribute){ | |
return attribute | |
.split(/;|!|=|>|<|&&|\[|\]|\+|\|\||\(|\)|\.\w+|\s\d+|".*?"|'.*?'|\s/) | |
.filter((e) => !!e); | |
} | |
// init watchers | |
watchAngularMethod(methods); | |
watchAngularData(data); | |
buildVueWatchers(data); | |
// instasnciate vue application | |
var vue = new Vue({ | |
el: elem[0], | |
components: getRequiredComponents(), | |
methods:methods, | |
data:data, | |
watch:watchers, | |
filters: { | |
currency, | |
dotToSpace, | |
humanize, | |
size | |
} | |
}); | |
}, | |
} | |
} | |
} | |
} | |
SlVueWrapper.$inject = ['$timeout']; | |
export default SlVueWrapper; | |
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