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import {StatementNode} from "../nodes/statement_node";
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 {MethodDefReturning} from "../5_syntax/expressions/method_def_returning";
import {MethodParam} from "../5_syntax/expressions/method_param";
import {BasicTypes} from "../5_syntax/basic_types";
import {IMethodParameters} from "./_method_parameters";
import {ObjectOriented} from "../5_syntax/_object_oriented";
import {ReferenceType} from "../5_syntax/_reference";
import {Identifier as IdentifierToken} from "../1_lexer/tokens/identifier";
import {ScopeType} from "../5_syntax/_scope_type";
import {SyntaxInput, syntaxIssue} from "../5_syntax/_syntax_input";
// todo:
// this.exceptions = [];
// also consider RAISING vs EXCEPTIONS
export class MethodParameters implements IMethodParameters {
private preferred: string | undefined;
private returning: TypedIdentifier | undefined;
private readonly importing: TypedIdentifier[];
private readonly optional: string[];
private readonly exporting: TypedIdentifier[];
private readonly changing: TypedIdentifier[];
private readonly exceptions: string[]; // todo, not filled
private readonly defaults: {[index: string]: ExpressionNode};
private readonly filename: string;
public constructor(node: StatementNode, input: SyntaxInput, abstractMethod: boolean) {
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 = input.filename;
// need the scope for LIKE typing inside method parameters
const parentName = input.scope.getName();
input.scope.push(ScopeType.MethodDefinition, "method definition", node.getStart(), input.filename);
try {
this.parse(node, input, parentName, abstractMethod);
this.checkNameLengths(input);
this.checkDuplicateNames();
} finally {
input.scope.pop(node.getEnd());
}
}
public getFilename(): string {
return this.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;
} else if (this.preferred?.toUpperCase() === i.getName().toUpperCase()) {
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, input: SyntaxInput, parentName: string, abstractMethod: boolean): void {
const handler = node.findFirstExpression(Expressions.EventHandler);
if (handler) {
const nameToken = node.findFirstExpression(Expressions.ClassName)?.getFirstToken();
const ooName = nameToken?.getStr();
const def = input.scope.findObjectDefinition(ooName);
const doVoid = def ? false : !input.scope.getDDIC().inErrorNamespace(ooName);
if (def) {
input.scope.addReference(nameToken, def, ReferenceType.ObjectOrientedReference, input.filename);
} else if (doVoid && ooName) {
input.scope.addReference(
nameToken, undefined, ReferenceType.ObjectOrientedVoidReference,
this.filename, {ooName: ooName.toUpperCase()});
}
const eventName = node.findFirstExpression(Expressions.EventName)?.getFirstToken().getStr();
const event = new ObjectOriented(input.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, VoidType.get(ooName), [IdentifierMeta.EventParameter]));
} else {
const type = new UnknownType(`handler parameter not found "${search}"`);
this.importing.push(new TypedIdentifier(token, this.filename, type, [IdentifierMeta.EventParameter]));
}
}
return;
}
const importing = node.findFirstExpression(Expressions.MethodDefImporting);
if (importing) {
this.add(this.importing, importing, input, [IdentifierMeta.MethodImporting], abstractMethod);
if (importing.findDirectTokenByText("PREFERRED")) {
this.preferred = importing.getLastToken().getStr().toUpperCase();
if (this.preferred.startsWith("!")) {
this.preferred = this.preferred.substring(1);
}
}
}
const exporting = node.findFirstExpression(Expressions.MethodDefExporting);
if (exporting) {
this.add(this.exporting, exporting, input, [IdentifierMeta.MethodExporting], abstractMethod);
}
const changing = node.findFirstExpression(Expressions.MethodDefChanging);
if (changing) {
this.add(this.changing, changing, input, [IdentifierMeta.MethodChanging], abstractMethod);
}
const returning = node.findFirstExpression(Expressions.MethodDefReturning);
if (returning) {
this.returning = MethodDefReturning.runSyntax(returning, input, [IdentifierMeta.MethodReturning]);
}
this.workaroundRAP(node, input, parentName);
}
private checkDuplicateNames(): void {
const names = new Set<string>();
for (const parameter of this.getAll()) {
const name = parameter.getName().toUpperCase();
if (names.has(name)) {
throw new Error(`Method parameter "${name}" already defined`);
}
names.add(name);
}
}
private checkNameLengths(input: SyntaxInput): void {
for (const parameter of this.getAll()) {
if (parameter.getName().length > 30) {
input.issues.push(syntaxIssue(input, parameter.getToken(), "Method parameter name longer than 30 characters"));
}
}
}
private workaroundRAP(node: StatementNode, input: SyntaxInput, parentName: string): void {
const resultName = node.findExpressionAfterToken("RESULT");
const concat = node.concatTokens().toUpperCase();
const isRap = node.findExpressionAfterToken("IMPORTING")
|| (concat.includes(" IMPORTING REQUEST ") ? node.findExpressionAfterToken("REQUEST") : undefined);
if (isRap) {
// "FOR LOCK" handlers have a well defined signature, so the types can be derived
const lockEntity = concat.includes(" FOR LOCK ")
? node.findExpressionAfterToken("LOCK")?.concatTokens()
: undefined;
for (const foo of node.findDirectExpressions(Expressions.MethodParamName)) {
if (foo === resultName) {
continue;
}
const type = lockEntity === undefined
? VoidType.get("RapMethodParameter")
: new BasicTypes(input).rapTableFor(lockEntity);
this.importing.push(new TypedIdentifier(foo.getFirstToken(), input.filename, type, [IdentifierMeta.MethodImporting]));
}
if (lockEntity !== undefined) {
// note: "mapped" is not part of the signature for "FOR LOCK"
const token = isRap.getFirstToken();
this.exporting.push(new TypedIdentifier(new IdentifierToken(token.getStart(), "failed"), input.filename, VoidType.get(`RESPONSE FOR FAILED EARLY ${lockEntity}`), [IdentifierMeta.MethodExporting]));
this.exporting.push(new TypedIdentifier(new IdentifierToken(token.getStart(), "reported"), input.filename, VoidType.get(`RESPONSE FOR REPORTED EARLY ${lockEntity}`), [IdentifierMeta.MethodExporting]));
} else if (concat.includes(" FOR VALIDATE ")
|| concat.includes(" FOR BEHAVIOR ")
|| concat.includes(" FOR DETERMINE ")
|| concat.includes(" FOR FEATURES ")
|| concat.includes(" FOR INSTANCE FEATURES ")
|| concat.includes(" FOR GLOBAL AUTHORIZATION ")
|| concat.includes(" FOR PRECHECK ")
|| concat.includes(" FOR NUMBERING ")
|| concat.includes(" FOR READ ")
|| concat.includes(" FOR VALIDATION ")
|| concat.includes(" FOR MODIFY ")) {
const token = isRap.getFirstToken();
this.exporting.push(new TypedIdentifier(new IdentifierToken(token.getStart(), "failed"), input.filename, VoidType.get("RapMethodParameter"), [IdentifierMeta.MethodExporting]));
this.exporting.push(new TypedIdentifier(new IdentifierToken(token.getStart(), "mapped"), input.filename, VoidType.get("RapMethodParameter"), [IdentifierMeta.MethodExporting]));
this.exporting.push(new TypedIdentifier(new IdentifierToken(token.getStart(), "reported"), input.filename, VoidType.get("RapMethodParameter"), [IdentifierMeta.MethodExporting]));
}
}
if (resultName) {
const token = resultName.getFirstToken();
this.importing.push(new TypedIdentifier(token, input.filename, VoidType.get("RapMethodParameter"), [IdentifierMeta.MethodExporting]));
}
// its some kind of magic
if (parentName.toUpperCase() === "CL_ABAP_BEHAVIOR_SAVER") {
const tempChanging = this.changing.map(c => new TypedIdentifier(c.getToken(), input.filename, VoidType.get("RapMethodParameter"), c.getMeta()));
while (this.changing.length > 0) {
this.changing.shift();
}
this.changing.push(...tempChanging);
const tempImporting = this.importing.map(c => new TypedIdentifier(c.getToken(), input.filename, VoidType.get("RapMethodParameter"), c.getMeta()));
while (this.importing.length > 0) {
this.importing.shift();
}
this.importing.push(...tempImporting);
}
}
private add(target: TypedIdentifier[], source: ExpressionNode, input: SyntaxInput, meta: IdentifierMeta[], abstractMethod: boolean): void {
for (const opt of source.findAllExpressions(Expressions.MethodParamOptional)) {
const p = opt.findDirectExpression(Expressions.MethodParam);
if (p === undefined) {
continue;
}
const extraMeta: IdentifierMeta[] = [];
if (this.isPassByValue(p)) {
extraMeta.push(IdentifierMeta.PassByValue);
} else if (meta.includes(IdentifierMeta.MethodImporting)) {
extraMeta.push(IdentifierMeta.ReadOnly);
}
if (abstractMethod === true) {
extraMeta.push(IdentifierMeta.Abstract);
}
const id = MethodParam.runSyntax(p, input, [...meta, ...extraMeta]);
input.scope.addIdentifier(id);
target.push(id);
if (opt.findDirectTokenByText("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) {
const extraMeta = this.isPassByValue(param) ? [IdentifierMeta.PassByValue] : [];
target.push(MethodParam.runSyntax(param, input, [...meta, ...extraMeta]));
}
}
private isPassByValue(param: ExpressionNode): boolean {
return param.getFirstToken().getStr().toUpperCase() === "VALUE"
&& param.getChildren()[1]?.getFirstToken().getStr() === "(";
}
}
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