123 lines
3.4 KiB
TypeScript
123 lines
3.4 KiB
TypeScript
import constant from '/imports/parser/parseTree/constant';
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import array from '/imports/parser/parseTree/array';
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import ResolvedResult from '/imports/parser/types/ResolvedResult';
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import { getFromScope } from '/imports/api/creature/creatures/CreatureVariables';
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import ResolveLevelFunction from '/imports/parser/types/ResolveLevelFunction';
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export type AccessorNode = {
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parseType: 'accessor' | 'symbol';
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path?: string[];
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name: string;
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}
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type AccessorFactory = {
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create(node: Partial<AccessorNode>): AccessorNode;
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compile: ResolveLevelFunction<AccessorNode>;
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reduce: ResolveLevelFunction<AccessorNode>;
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toString(node: AccessorNode): string;
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}
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const accessor: AccessorFactory = {
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create({ name, path }: { name: string, path?: string[] }): AccessorNode {
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return {
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parseType: 'accessor',
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path,
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name,
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};
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},
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async compile(node, scope, context) {
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let value = getFromScope(node.name, scope);
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// Get the value from the given path
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node.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 valueType = getType(value);
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// If the accessor returns an object, get the object's value instead
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while (valueType === 'object') {
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// Prefer the valueNode over the value
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if (value.valueNode) {
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value = value.valueNode;
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} else {
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value = value.value;
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}
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valueType = getType(value);
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}
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// Return a discovered parse node
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if (valueType === 'parseNode') {
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return {
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result: value,
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context,
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};
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}
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// Return a parse node based on the constant type returned
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if (valueType === 'string' || valueType === 'number' || valueType === 'boolean') {
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return {
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result: constant.create({ value }),
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context,
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};
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}
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// Return a parser array
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if (valueType === 'array') {
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// If the first value is a parse node, assume all the values are
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if (getType(value[0]) === 'parseNode') {
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return {
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result: array.create({
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values: value,
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}),
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context,
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};
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}
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// Create the array from js primitives instead
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return {
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result: array.fromConstantArray(value),
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context,
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};
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}
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if (valueType === 'undefined') {
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// Undefined defaults to zero
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return {
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result: constant.create({
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value: 0,
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}),
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context
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};
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}
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context.error(`Accessing ${accessor.toString(node)} is not supported yet`);
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return {
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result: accessor.create({
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name: node.name,
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path: node.path,
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}),
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context,
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};
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},
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async reduce(node, scope, context, inputProvider, resolveOthers): Promise<ResolvedResult> {
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let { result } = await accessor.compile(node, scope, context, inputProvider, resolveOthers);
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({ result } = await resolveOthers('reduce', result, scope, context, inputProvider));
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if (result.parseType === 'accessor') {
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return {
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result: constant.create({
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value: 0,
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}),
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context
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};
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} else {
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return { result, context };
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}
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},
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toString(node) {
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if (!node.path?.length) return `${node.name}`;
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return `${node.name}.${node.path.join('.')}`;
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}
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}
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function getType(val) {
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if (!val) return typeof val;
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if (Array.isArray(val)) return 'array';
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if (val.parseType) return 'parseNode';
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return typeof val;
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}
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export default accessor;
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