iterate() {
let { ref, keyFor, valueTag } = this;
let iterable = ref.value();
if (isProxy(iterable)) {
valueTag.update(VOLATILE_TAG);
} else {
valueTag.update(tagFor(iterable));
}
if (iterable === undefined || iterable === null) {
return EMPTY_ITERATOR;
} else if (isEmberArray(iterable)) {
return new EmberArrayIterator(iterable, keyFor);
} else if (Array.isArray(iterable)) {
return iterable.length > 0 ? new ArrayIterator(iterable, keyFor) : EMPTY_ITERATOR;
} else if (isEachIn(ref)) {
let keys = Object.keys(iterable);
let values = keys.map(key => iterable[key]);
return keys.length > 0 ? new ObjectKeysIterator(keys, values, keyFor) : EMPTY_ITERATOR;
} else {
throw new Error(`Don't know how to {{#each ${iterable}}}`);
}
}
iterate() {
let { ref, keyFor, valueTag } = this;
let iterable = ref.value();
if (isProxy(iterable)) {
valueTag.update(CURRENT_TAG);
} else {
valueTag.update(tagFor(iterable));
}
if (iterable === undefined || iterable === null) {
return EMPTY_ITERATOR;
} else if (isEachIn(ref)) {
let keys = Object.keys(iterable);
let values = keys.map(key => iterable[key]);
return keys.length > 0 ? new ObjectKeysIterator(keys, values, keyFor) : EMPTY_ITERATOR;
} else if (isEmberArray(iterable)) {
return new EmberArrayIterator(iterable, keyFor);
} else if (Array.isArray(iterable)) {
return iterable.length > 0 ? new ArrayIterator(iterable, keyFor) : EMPTY_ITERATOR;
} else if (typeof iterable.forEach === 'function') {
let array = [];
iterable.forEach(function(item) {
array.push(item);
});
return array.length > 0 ? new ArrayIterator(array, keyFor) : EMPTY_ITERATOR;
} else {
throw new Error(`Don't know how to {{#each ${iterable}}}`);
}
}
toBool(predicate) {
this.objectTag.update(tagFor(predicate));
if (isProxy(predicate)) {
return get(predicate, 'isTruthy');
} else {
return emberToBool(predicate);
}
}
static create(reference) {
if (isConst(reference)) {
let value = reference.value();
if (isProxy(value)) {
return new RootPropertyReference(value, 'isTruthy');
} else {
return new PrimitiveReference(emberToBool(value));
}
}
return new ConditionalReference(reference);
}
iterate() {
let { ref, keyFor, valueTag } = this;
let iterable = ref.value();
if (isProxy(iterable)) {
valueTag.update(CURRENT_TAG);
iterable = get(iterable, 'content');
} else {
valueTag.update(tagFor(iterable));
}
if (iterable === undefined || iterable === null) {
return EMPTY_ITERATOR;
}
let typeofIterable = typeof iterable;
if (typeofIterable !== 'object' && typeofIterable !== 'function') {
return EMPTY_ITERATOR;
}
if (isEachIn(ref)) {
let keys = Object.keys(iterable);
let values = keys.map(key => iterable[key]);
return keys.length > 0 ? new ObjectKeysIterator(keys, values, keyFor) : EMPTY_ITERATOR;
}
if (Array.isArray(iterable)) {
return iterable.length > 0 ? new ArrayIterator(iterable, keyFor) : EMPTY_ITERATOR;
} else if (isEmberArray(iterable)) {
return get(iterable, 'length') > 0 ? new EmberArrayIterator(iterable, keyFor) : EMPTY_ITERATOR;
} else if (typeof iterable.forEach === 'function') {
let array = [];
iterable.forEach(function(item) {
array.push(item);
});
return array.length > 0 ? new ArrayIterator(array, keyFor) : EMPTY_ITERATOR;
} else {
return EMPTY_ITERATOR;
}
}