103 lines
3.1 KiB
JavaScript
103 lines
3.1 KiB
JavaScript
import _objectSpread from "@babel/runtime/helpers/esm/objectSpread2";
|
|
import _typeof from "@babel/runtime/helpers/esm/typeof";
|
|
export var STATUS_ADD = 'add';
|
|
export var STATUS_KEEP = 'keep';
|
|
export var STATUS_REMOVE = 'remove';
|
|
export var STATUS_REMOVED = 'removed';
|
|
export function wrapKeyToObject(key) {
|
|
var keyObj;
|
|
if (key && _typeof(key) === 'object' && 'key' in key) {
|
|
keyObj = key;
|
|
} else {
|
|
keyObj = {
|
|
key: key
|
|
};
|
|
}
|
|
return _objectSpread(_objectSpread({}, keyObj), {}, {
|
|
key: String(keyObj.key)
|
|
});
|
|
}
|
|
export function parseKeys() {
|
|
var keys = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
|
|
return keys.map(wrapKeyToObject);
|
|
}
|
|
export function diffKeys() {
|
|
var prevKeys = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
|
|
var currentKeys = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
|
|
var list = [];
|
|
var currentIndex = 0;
|
|
var currentLen = currentKeys.length;
|
|
var prevKeyObjects = parseKeys(prevKeys);
|
|
var currentKeyObjects = parseKeys(currentKeys);
|
|
|
|
// Check prev keys to insert or keep
|
|
prevKeyObjects.forEach(function (keyObj) {
|
|
var hit = false;
|
|
for (var i = currentIndex; i < currentLen; i += 1) {
|
|
var currentKeyObj = currentKeyObjects[i];
|
|
if (currentKeyObj.key === keyObj.key) {
|
|
// New added keys should add before current key
|
|
if (currentIndex < i) {
|
|
list = list.concat(currentKeyObjects.slice(currentIndex, i).map(function (obj) {
|
|
return _objectSpread(_objectSpread({}, obj), {}, {
|
|
status: STATUS_ADD
|
|
});
|
|
}));
|
|
currentIndex = i;
|
|
}
|
|
list.push(_objectSpread(_objectSpread({}, currentKeyObj), {}, {
|
|
status: STATUS_KEEP
|
|
}));
|
|
currentIndex += 1;
|
|
hit = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If not hit, it means key is removed
|
|
if (!hit) {
|
|
list.push(_objectSpread(_objectSpread({}, keyObj), {}, {
|
|
status: STATUS_REMOVE
|
|
}));
|
|
}
|
|
});
|
|
|
|
// Add rest to the list
|
|
if (currentIndex < currentLen) {
|
|
list = list.concat(currentKeyObjects.slice(currentIndex).map(function (obj) {
|
|
return _objectSpread(_objectSpread({}, obj), {}, {
|
|
status: STATUS_ADD
|
|
});
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Merge same key when it remove and add again:
|
|
* [1 - add, 2 - keep, 1 - remove] -> [1 - keep, 2 - keep]
|
|
*/
|
|
var keys = {};
|
|
list.forEach(function (_ref) {
|
|
var key = _ref.key;
|
|
keys[key] = (keys[key] || 0) + 1;
|
|
});
|
|
var duplicatedKeys = Object.keys(keys).filter(function (key) {
|
|
return keys[key] > 1;
|
|
});
|
|
duplicatedKeys.forEach(function (matchKey) {
|
|
// Remove `STATUS_REMOVE` node.
|
|
list = list.filter(function (_ref2) {
|
|
var key = _ref2.key,
|
|
status = _ref2.status;
|
|
return key !== matchKey || status !== STATUS_REMOVE;
|
|
});
|
|
|
|
// Update `STATUS_ADD` to `STATUS_KEEP`
|
|
list.forEach(function (node) {
|
|
if (node.key === matchKey) {
|
|
// eslint-disable-next-line no-param-reassign
|
|
node.status = STATUS_KEEP;
|
|
}
|
|
});
|
|
});
|
|
return list;
|
|
} |