json-express
Version:
Parse JSON expression and transform into another forms.
408 lines (407 loc) • 18.1 kB
JavaScript
;
var __extends = (this && this.__extends) || (function () {
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extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
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function verb(n) { return function (v) { return step([n, v]); }; }
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var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var eventemitter3_1 = __importDefault(require("eventemitter3"));
var template_expression_1 = __importDefault(require("./template-expression"));
var JsonExpressRuntime = /** @class */ (function (_super) {
__extends(JsonExpressRuntime, _super);
function JsonExpressRuntime(handlerItems) {
var _this = _super.call(this) || this;
_this.handlerItems = [];
_this.namedHandlerItems = {};
_this.handlerItems = handlerItems;
for (var _i = 0, handlerItems_1 = handlerItems; _i < handlerItems_1.length; _i++) {
var item = handlerItems_1[_i];
if (item.handlerName) {
_this.namedHandlerItems[item.handlerName] = item;
}
}
return _this;
}
JsonExpressRuntime.prototype.run = function (expression, context) {
var _this = this;
if (context === void 0) { context = {}; }
try {
this.buildExpression(expression, context, function (value, completed) {
if (completed) {
_this.emit('completed', value);
}
else {
_this.emit('update', value);
}
}, 0, null);
}
catch (e) {
this.emit('error', e);
}
};
JsonExpressRuntime.prototype.buildExpression = function (expression, context, continuation, plainLevel, buildType) {
if (buildType) {
if (!this.buildByBuildType(expression, context, continuation, plainLevel, buildType)) {
throw new Error('No matched type: ' + JSON.stringify(expression));
}
}
else {
this.buildAny(expression, context, continuation, plainLevel);
}
};
JsonExpressRuntime.prototype.buildByBuildType = function (expression, context, continuation, plainLevel, buildType) {
switch (buildType.type) {
case '@tuple':
if (!Array.isArray(expression) || expression.length !== buildType.children.length) {
return false;
}
this.buildTuple(expression, context, continuation, plainLevel, buildType.children);
return true;
case '@record':
if (typeof expression !== 'object') {
return false;
}
this.buildRecord(expression, context, continuation, buildType.record);
return true;
case '@choice':
for (var _i = 0, _a = buildType.children; _i < _a.length; _i++) {
var subType = _a[_i];
if (this.buildByBuildType(expression, context, continuation, plainLevel, subType)) {
return true;
}
}
return false;
case 'string':
if (typeof expression !== 'string') {
return false;
}
this.buildString(expression, context, continuation);
return true;
case 'array':
if (!Array.isArray(expression)) {
return false;
}
this.buildArray(expression, context, continuation, plainLevel, buildType.children ? buildType.children[0] : null);
return true;
case 'number':
if (typeof expression !== 'number') {
return false;
}
continuation(expression, true);
return true;
case 'boolean':
if (typeof expression !== 'boolean') {
return false;
}
continuation(expression, true);
return true;
case 'null':
if (expression !== null) {
return false;
}
continuation(expression, true);
return true;
case 'any':
this.buildAny(expression, context, continuation, plainLevel);
return true;
default:
var item = this.namedHandlerItems[buildType.type];
if (!item || typeof item !== 'object') {
return false;
}
if (!item.matcher.test(expression)) {
return false;
}
this.buildWholeObject(expression, context, continuation, item);
return true;
}
};
JsonExpressRuntime.prototype.buildAny = function (expression, context, continuation, plainLevel) {
if (expression === null) {
continuation(null, true);
}
else if (typeof expression === 'string') {
this.buildString(expression, context, continuation);
}
else if (Array.isArray(expression)) {
this.buildArray(expression, context, continuation, plainLevel, null);
}
else if (typeof expression === 'object') {
if (plainLevel === 0) {
var item = this.getHandlerItem(expression);
if (!item) {
throw new Error('No matched schema: ' + JSON.stringify(expression));
}
this.buildWholeObject(expression, context, continuation, item);
}
else {
this.buildPlainObject(expression, context, continuation, plainLevel);
}
}
else {
continuation(expression, true);
}
};
JsonExpressRuntime.prototype.buildString = function (expression, context, continuation) {
var _this = this;
template_expression_1.default
.cache(expression, context)
.then(function (r) { return continuation(r, true); })
.catch(function (e) { return _this.emit('error', e); });
};
JsonExpressRuntime.prototype.buildArray = function (expression, context, continuation, plainLevel, buildType) {
var nextPlainLevel = plainLevel > 0 ? plainLevel - 1 : plainLevel;
var arr = [];
var checker = new Array(expression.length).fill(false);
var checkCount = 0;
var completeCount = 0;
var _loop_1 = function (i) {
this_1.buildExpression(expression[i], context, function (v, completed) {
arr[i] = v;
if (!checker[i]) {
checker[i] = true;
checkCount++;
}
// callbacks that completed is set true will appear exactly once per each
if (completed) {
completeCount++;
}
if (checkCount === checker.length) {
continuation(arr, completeCount === checkCount);
}
}, nextPlainLevel, buildType);
};
var this_1 = this;
for (var i = 0; i < expression.length; i++) {
_loop_1(i);
}
};
JsonExpressRuntime.prototype.buildTuple = function (expression, context, continuation, plainLevel, buildTypes) {
var nextPlainLevel = plainLevel > 0 ? plainLevel - 1 : plainLevel;
var arr = [];
var checker = new Array(expression.length).fill(false);
var checkCount = 0;
var completeCount = 0;
var _loop_2 = function (i) {
this_2.buildExpression(expression[i], context, function (v, completed) {
arr[i] = v;
if (!checker[i]) {
checker[i] = true;
checkCount++;
}
// callbacks that completed is set true will appear exactly once per each
if (completed) {
completeCount++;
}
if (checkCount === checker.length) {
continuation(arr, completeCount === checkCount);
}
}, nextPlainLevel, buildTypes[i]);
};
var this_2 = this;
for (var i = 0; i < expression.length; i++) {
_loop_2(i);
}
};
JsonExpressRuntime.prototype.buildWholeObject = function (expression, context, continuation, _a) {
var _b;
var _this = this;
var handler = _a.handler, matcher = _a.matcher, typeCheckers = _a.typeCheckers;
var rest = {};
var target = matcher.restColumn ? (_b = {}, _b[matcher.restColumn.name] = rest, _b) : {};
var keys = Object.keys(expression);
var _loop_3 = function (key) {
var v = expression[key];
if (matcher.columns.some(function (col) { return col.name === key; })) {
target[key] = v;
}
else {
rest[key] = v;
}
};
for (var _i = 0, keys_1 = keys; _i < keys_1.length; _i++) {
var key = keys_1[_i];
_loop_3(key);
}
var checker = new Set();
var propertyNames = Object.keys(target);
var completeCount = 0;
var _loop_4 = function (key) {
var column = matcher.schema[key];
var typeChecker = typeCheckers[key];
if (column.lazy) {
var oldValue_1 = target[key];
var thunk = function (lazyContext) { return __awaiter(_this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (resolve) {
_this.buildExpression(oldValue_1, lazyContext, function (v, completed) {
if (completed) {
if (typeChecker) {
typeChecker(v);
}
resolve(v);
}
}, column.plainLevel, matcher.buildTypes[key]);
})];
});
}); };
target[key] = thunk;
checker.add(key);
completeCount++;
if (checker.size === propertyNames.length) {
this_3.buildObject(target, context, continuation, handler, checker.size === completeCount);
}
}
else {
this_3.buildExpression(target[key], context, function (v, completed) {
target[key] = v;
checker.add(key);
if (completed) {
if (typeChecker) {
typeChecker(v);
}
completeCount++;
}
if (checker.size === propertyNames.length) {
_this.buildObject(target, context, continuation, handler, checker.size === completeCount);
}
}, column.plainLevel, matcher.buildTypes[key]);
}
};
var this_3 = this;
for (var _c = 0, propertyNames_1 = propertyNames; _c < propertyNames_1.length; _c++) {
var key = propertyNames_1[_c];
_loop_4(key);
}
};
JsonExpressRuntime.prototype.buildRecord = function (expression, context, continuation, record) {
var target = {};
var checker = new Set();
var propertyNames = Object.keys(expression);
var completeCount = 0;
for (var key in record) {
if (!record[key].optional && key !== '...' && !(key in expression)) {
throw new TypeError('No matched record type: ' + JSON.stringify(expression));
}
}
var _loop_5 = function (key) {
var buildType = null;
if (!(key in record)) {
if (!('...' in record)) {
throw new TypeError('No matched record type: ' + JSON.stringify(expression));
}
buildType = record['...'];
}
else {
buildType = record[key];
}
this_4.buildExpression(expression[key], context, function (value, completed) {
target[key] = value;
checker.add(key);
if (completed) {
completeCount++;
}
if (checker.size === propertyNames.length) {
var allCompleted = checker.size === completeCount;
continuation(target, allCompleted);
}
}, 0, buildType);
};
var this_4 = this;
for (var _i = 0, propertyNames_2 = propertyNames; _i < propertyNames_2.length; _i++) {
var key = propertyNames_2[_i];
_loop_5(key);
}
};
JsonExpressRuntime.prototype.buildPlainObject = function (expression, context, continuation, plainLevel) {
var nextPlainLevel = plainLevel > 0 ? plainLevel - 1 : plainLevel;
var target = {};
var checker = new Set();
var propertyNames = Object.keys(expression);
var completeCount = 0;
var _loop_6 = function (key) {
this_5.buildAny(expression[key], context, function (v, completed) {
target[key] = v;
checker.add(key);
if (completed) {
completeCount++;
}
if (checker.size === propertyNames.length) {
var allCompleted = checker.size === completeCount;
continuation(target, allCompleted);
}
}, nextPlainLevel);
};
var this_5 = this;
for (var _i = 0, propertyNames_3 = propertyNames; _i < propertyNames_3.length; _i++) {
var key = propertyNames_3[_i];
_loop_6(key);
}
};
JsonExpressRuntime.prototype.buildObject = function (expression, context, continuation, handler, allCompleted) {
if ('placeholder' in handler) {
continuation(handler.placeholder(expression), false);
}
var result = handler.build(expression, context);
if (result instanceof Promise) {
result.then(function (r) { return continuation(r, allCompleted); });
}
else {
continuation(result, allCompleted);
}
};
JsonExpressRuntime.prototype.getHandlerItem = function (expression) {
var item = this.handlerItems.find(function (item) { return !item.handler.exclusive && item.matcher.test(expression); });
return item;
};
return JsonExpressRuntime;
}(eventemitter3_1.default));
exports.default = JsonExpressRuntime;