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import {MethodDef} from "../2_statements/statements/method_def";
import * as Expressions from "../2_statements/expressions";
import {ExpressionNode} from "../nodes";
import {TypedIdentifier, IdentifierMeta} from "./_typed_identifier";
import {ObjectReferenceType, UnknownType, VoidType} from "./basic";
import {CurrentScope} from "../5_syntax/_current_scope";
import {MethodDefReturning} from "../5_syntax/expressions/method_def_returning";
import {MethodParam} from "../5_syntax/expressions/method_param";
import {IMethodParameters} from "./_method_parameters";
import {ObjectOriented} from "../5_syntax/_object_oriented";
import {ReferenceType} from "../5_syntax/_reference";
// todo:
// this.exceptions = [];
// also consider RAISING vs EXCEPTIONS
export class MethodParameters implements IMethodParameters {
private readonly importing: TypedIdentifier[];
private readonly optional: string[];
private readonly exporting: TypedIdentifier[];
private readonly changing: TypedIdentifier[];
private preferred: string | undefined;
private returning: TypedIdentifier | undefined;
private readonly exceptions: string[]; // todo, not filled
private readonly defaults: {[index: string]: ExpressionNode};
private readonly filename: string;
public constructor(node: StatementNode, filename: string, scope: CurrentScope) {
if (!(node.get() instanceof MethodDef)) {
throw new Error("MethodDefinition, expected MethodDef as part of input node");
}
this.importing = [];
this.exporting = [];
this.changing = [];
this.optional = [];
this.defaults = {};
this.returning = undefined;
this.preferred = undefined;
this.exceptions = [];
this.filename = filename;
this.parse(node, scope, filename);
}
public getOptional(): string[] {
return this.optional;
}
public getAll(): TypedIdentifier[] {
const ret: TypedIdentifier[] = [];
const returning = this.getReturning();
if (returning) {
ret.push(returning);
}
ret.push(...this.getImporting());
ret.push(...this.getExporting());
ret.push(...this.getChanging());
return ret;
}
public getDefaultImporting(): string | undefined {
if (this.importing.length === 0) {
return undefined;
} else if (this.importing.length === 1) {
return this.importing[0].getName().toUpperCase();
} else if (this.preferred) {
return this.preferred;
}
let candidates = this.importing.map(i => i.getName().toUpperCase());
candidates = candidates.filter(c => this.optional.indexOf(c) < 0);
if (candidates.length === 1) {
return candidates[0];
}
return undefined;
}
public getImporting() {
return this.importing;
}
public getRequiredParameters() {
const ret: TypedIdentifier[] = [];
for (const i of this.getImporting()) {
if (this.getOptional().some(o => o.toUpperCase() === i.getName().toUpperCase()) === true) {
continue;
}
ret.push(i);
}
for (const i of this.getChanging()) {
if (this.getOptional().some(o => o.toUpperCase() === i.getName().toUpperCase()) === true) {
continue;
}
ret.push(i);
}
return ret;
}
public getExporting() {
return this.exporting;
}
public getChanging() {
return this.changing;
}
public getReturning() {
return this.returning;
}
public getExceptions() {
return this.exceptions;
}
public getParameterDefault(parameter: string) {
return this.defaults[parameter.toUpperCase()];
}
///////////////////
private parse(node: StatementNode, scope: CurrentScope, filename: string): void {
const handler = node.findFirstExpression(Expressions.EventHandler);
if (handler) {
const nameToken = node.findFirstExpression(Expressions.ClassName)?.getFirstToken();
const ooName = nameToken?.getStr();
const def = scope.findObjectDefinition(ooName);
if (def) {
scope.addReference(nameToken, def, ReferenceType.ObjectOrientedReference, filename);
}
const doVoid = def ? false : !scope.getDDIC().inErrorNamespace(ooName);
const eventName = node.findFirstExpression(Expressions.Field)?.getFirstToken().getStr();
const event = new ObjectOriented(scope).searchEvent(def, eventName);
for (const p of handler.findAllExpressions(Expressions.MethodParamName)) {
const token = p.getFirstToken();
const search = token.getStr().toUpperCase().replace("!", "");
this.optional.push(search); // all parameters optional for event handlers
if (search === "SENDER" && def) {
this.importing.push(new TypedIdentifier(token, this.filename, new ObjectReferenceType(def), [IdentifierMeta.EventParameter]));
continue;
}
const found = event?.getParameters().find(p => p.getName().toUpperCase() === search);
if (found) {
this.importing.push(new TypedIdentifier(token, this.filename, found.getType(), [IdentifierMeta.EventParameter]));
} else if (doVoid) {
this.importing.push(new TypedIdentifier(token, this.filename, new VoidType(ooName), [IdentifierMeta.EventParameter]));
} else {
const type = new UnknownType(`handler parameter not found "${search}"`);
this.importing.push(new TypedIdentifier(token, this.filename, type, [IdentifierMeta.EventParameter]));
}
}
return;
}
const importing = node.findFirstExpression(Expressions.MethodDefImporting);
if (importing) {
this.add(this.importing, importing, scope, [IdentifierMeta.MethodImporting]);
if (importing.concatTokens().toUpperCase().includes(" PREFERRED PARAMETER")) {
this.preferred = importing.getLastToken().getStr().toUpperCase();
}
}
const exporting = node.findFirstExpression(Expressions.MethodDefExporting);
if (exporting) {
this.add(this.exporting, exporting, scope, [IdentifierMeta.MethodExporting]);
}
const changing = node.findFirstExpression(Expressions.MethodDefChanging);
if (changing) {
this.add(this.changing, changing, scope, [IdentifierMeta.MethodChanging]);
}
const returning = node.findFirstExpression(Expressions.MethodDefReturning);
if (returning) {
this.returning = new MethodDefReturning().runSyntax(returning, scope, this.filename, [IdentifierMeta.MethodReturning]);
}
}
private add(target: TypedIdentifier[], source: ExpressionNode, scope: CurrentScope, meta: IdentifierMeta[]): void {
for (const opt of source.findAllExpressions(Expressions.MethodParamOptional)) {
const p = opt.findDirectExpression(Expressions.MethodParam);
if (p === undefined) {
continue;
}
target.push(new MethodParam().runSyntax(p, scope, this.filename, meta));
if (opt.getLastToken().getStr().toUpperCase() === "OPTIONAL") {
const name = target[target.length - 1].getName().toUpperCase();
this.optional.push(name);
} else if (opt.findFirstExpression(Expressions.Default)) {
const name = target[target.length - 1].getName().toUpperCase();
this.optional.push(name);
const val = opt.findFirstExpression(Expressions.Default)?.getLastChild();
if (val && val instanceof ExpressionNode) {
this.defaults[name] = val;
}
}
}
if (target.length > 0) {
return;
}
const params = source.findAllExpressions(Expressions.MethodParam);
for (const param of params) {
target.push(new MethodParam().runSyntax(param, scope, this.filename, meta));
}
}
} |