47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
import ParseNode from '/imports/parser/parseTree/ParseNode.js';
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import ErrorNode from '/imports/parser/parseTree/ErrorNode.js';
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import ConstantNode from '/imports/parser/parseTree/ConstantNode.js';
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export default class AccessorNode extends ParseNode {
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constructor({name, path}) {
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super(...arguments);
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this.name = name;
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this.path = path;
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}
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compile(scope){
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let value = scope && scope[this.name];
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// For objects, get their value
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this.path.forEach(name => {
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if (value === undefined) return;
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value = value[name];
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});
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let type = typeof value;
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if (type === 'string' || type === 'number' || type === 'boolean'){
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return new ConstantNode({value, type, previousNodes: [this]});
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} else if (type === 'undefined'){
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return new AccessorNode({
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name: this.name,
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path: this.path,
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previousNodes: [this],
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});
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} else {
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throw new Meteor.Error(`Unexpected case: ${this.name} resolved to ${value}`);
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}
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}
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reduce(scope){
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let result = this.compile(scope);
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if (result instanceof AccessorNode){
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return new ErrorNode({
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node: result,
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error: `${this.toString()} could not be resolved`,
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previousNodes: [result],
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});
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} else {
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return result;
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}
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}
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toString(){
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return `${this.name}.${this.path.join('.')}`;
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}
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}
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