ember-legacy-class-transform
Version:
The default blueprint for ember-cli addons.
149 lines (143 loc) • 17.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = traverse;
exports.normalizeVisitor = normalizeVisitor;
var _visitorKeys = require('../types/visitor-keys');
var _visitorKeys2 = _interopRequireDefault(_visitorKeys);
var _errors = require('./errors');
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function visitNode(visitor, node) {
let handler = visitor[node.type] || visitor.All || null;
let result;
if (handler && handler['enter']) {
result = handler['enter'].call(null, node);
}
if (result !== undefined && result !== null) {
if (JSON.stringify(node) === JSON.stringify(result)) {
result = undefined;
} else if (Array.isArray(result)) {
return visitArray(visitor, result) || result;
} else {
return visitNode(visitor, result) || result;
}
}
if (result === undefined) {
let keys = _visitorKeys2.default[node.type];
for (let i = 0; i < keys.length; i++) {
visitKey(visitor, handler, node, keys[i]);
}
if (handler && handler['exit']) {
result = handler['exit'].call(null, node);
}
}
return result;
}
function visitKey(visitor, handler, node, key) {
let value = node[key];
if (!value) {
return;
}
let keyHandler = handler && (handler.keys[key] || handler.keys.All);
let result;
if (keyHandler && keyHandler.enter) {
result = keyHandler.enter.call(null, node, key);
if (result !== undefined) {
throw (0, _errors.cannotReplaceOrRemoveInKeyHandlerYet)(node, key);
}
}
if (Array.isArray(value)) {
visitArray(visitor, value);
} else {
let result = visitNode(visitor, value);
if (result !== undefined) {
assignKey(node, key, result);
}
}
if (keyHandler && keyHandler.exit) {
result = keyHandler.exit.call(null, node, key);
if (result !== undefined) {
throw (0, _errors.cannotReplaceOrRemoveInKeyHandlerYet)(node, key);
}
}
}
function visitArray(visitor, array) {
for (let i = 0; i < array.length; i++) {
let result = visitNode(visitor, array[i]);
if (result !== undefined) {
i += spliceArray(array, i, result) - 1;
}
}
}
function assignKey(node, key, result) {
if (result === null) {
throw (0, _errors.cannotRemoveNode)(node[key], node, key);
} else if (Array.isArray(result)) {
if (result.length === 1) {
node[key] = result[0];
} else {
if (result.length === 0) {
throw (0, _errors.cannotRemoveNode)(node[key], node, key);
} else {
throw (0, _errors.cannotReplaceNode)(node[key], node, key);
}
}
} else {
node[key] = result;
}
}
function spliceArray(array, index, result) {
if (result === null) {
array.splice(index, 1);
return 0;
} else if (Array.isArray(result)) {
array.splice(index, 1, ...result);
return result.length;
} else {
array.splice(index, 1, result);
return 1;
}
}
function traverse(node, visitor) {
visitNode(normalizeVisitor(visitor), node);
}
function normalizeVisitor(visitor) {
let normalizedVisitor = {};
for (let type in visitor) {
let handler = visitor[type] || visitor.All;
let normalizedKeys = {};
if (typeof handler === 'object') {
let keys = handler.keys;
if (keys) {
for (let key in keys) {
let keyHandler = keys[key];
if (typeof keyHandler === 'object') {
normalizedKeys[key] = {
enter: typeof keyHandler.enter === 'function' ? keyHandler.enter : null,
exit: typeof keyHandler.exit === 'function' ? keyHandler.exit : null
};
} else if (typeof keyHandler === 'function') {
normalizedKeys[key] = {
enter: keyHandler,
exit: null
};
}
}
}
normalizedVisitor[type] = {
enter: typeof handler.enter === 'function' ? handler.enter : null,
exit: typeof handler.exit === 'function' ? handler.exit : null,
keys: normalizedKeys
};
} else if (typeof handler === 'function') {
normalizedVisitor[type] = {
enter: handler,
exit: null,
keys: normalizedKeys
};
}
}
return normalizedVisitor;
}
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visitorKeys from '../types/visitor-keys';\nimport { cannotRemoveNode, cannotReplaceNode, cannotReplaceOrRemoveInKeyHandlerYet } from './errors';\nfunction visitNode(visitor, node) {\n    let handler = visitor[node.type] || visitor.All || null;\n    let result;\n    if (handler && handler['enter']) {\n        result = handler['enter'].call(null, node);\n    }\n    if (result !== undefined && result !== null) {\n        if (JSON.stringify(node) === JSON.stringify(result)) {\n            result = undefined;\n        } else if (Array.isArray(result)) {\n            return visitArray(visitor, result) || result;\n        } else {\n            return visitNode(visitor, result) || result;\n        }\n    }\n    if (result === undefined) {\n        let keys = visitorKeys[node.type];\n        for (let i = 0; i < keys.length; i++) {\n            visitKey(visitor, handler, node, keys[i]);\n        }\n        if (handler && handler['exit']) {\n            result = handler['exit'].call(null, node);\n        }\n    }\n    return result;\n}\nfunction visitKey(visitor, handler, node, key) {\n    let value = node[key];\n    if (!value) {\n        return;\n    }\n    let keyHandler = handler && (handler.keys[key] || handler.keys.All);\n    let result;\n    if (keyHandler && keyHandler.enter) {\n        result = keyHandler.enter.call(null, node, key);\n        if (result !== undefined) {\n            throw cannotReplaceOrRemoveInKeyHandlerYet(node, key);\n        }\n    }\n    if (Array.isArray(value)) {\n        visitArray(visitor, value);\n    } else {\n        let result = visitNode(visitor, value);\n        if (result !== undefined) {\n            assignKey(node, key, result);\n        }\n    }\n    if (keyHandler && keyHandler.exit) {\n        result = keyHandler.exit.call(null, node, key);\n        if (result !== undefined) {\n            throw cannotReplaceOrRemoveInKeyHandlerYet(node, key);\n        }\n    }\n}\nfunction visitArray(visitor, array) {\n    for (let i = 0; i < array.length; i++) {\n        let result = visitNode(visitor, array[i]);\n        if (result !== undefined) {\n            i += spliceArray(array, i, result) - 1;\n        }\n    }\n}\nfunction assignKey(node, key, result) {\n    if (result === null) {\n        throw cannotRemoveNode(node[key], node, key);\n    } else if (Array.isArray(result)) {\n        if (result.length === 1) {\n            node[key] = result[0];\n        } else {\n            if (result.length === 0) {\n                throw cannotRemoveNode(node[key], node, key);\n            } else {\n                throw cannotReplaceNode(node[key], node, key);\n            }\n        }\n    } else {\n        node[key] = result;\n    }\n}\nfunction spliceArray(array, index, result) {\n    if (result === null) {\n        array.splice(index, 1);\n        return 0;\n    } else if (Array.isArray(result)) {\n        array.splice(index, 1, ...result);\n        return result.length;\n    } else {\n        array.splice(index, 1, result);\n        return 1;\n    }\n}\nexport default function traverse(node, visitor) {\n    visitNode(normalizeVisitor(visitor), node);\n}\nexport function normalizeVisitor(visitor) {\n    let normalizedVisitor = {};\n    for (let type in visitor) {\n        let handler = visitor[type] || visitor.All;\n        let normalizedKeys = {};\n        if (typeof handler === 'object') {\n            let keys = handler.keys;\n            if (keys) {\n                for (let key in keys) {\n                    let keyHandler = keys[key];\n                    if (typeof keyHandler === 'object') {\n                        normalizedKeys[key] = {\n                            enter: typeof keyHandler.enter === 'function' ? keyHandler.enter : null,\n                            exit: typeof keyHandler.exit === 'function' ? keyHandler.exit : null\n                        };\n                    } else if (typeof keyHandler === 'function') {\n                        normalizedKeys[key] = {\n                            enter: keyHandler,\n                            exit: null\n                        };\n                    }\n                }\n            }\n            normalizedVisitor[type] = {\n                enter: typeof handler.enter === 'function' ? handler.enter : null,\n                exit: typeof handler.exit === 'function' ? handler.exit : null,\n                keys: normalizedKeys\n            };\n        } else if (typeof handler === 'function') {\n            normalizedVisitor[type] = {\n                enter: handler,\n                exit: null,\n                keys: normalizedKeys\n            };\n        }\n    }\n    return normalizedVisitor;\n}"]}