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import {BasicRuleConfig} from "./_basic_rule_config";
import {IRegistry} from "../_iregistry";
import {IRule, IRuleMetadata, RuleTag} from "./_irule";
import {IObject} from "../objects/_iobject";
import {SyntaxLogic} from "../abap/5_syntax/syntax";
import {ABAPObject} from "../objects/_abap_object";
import {ScopeType} from "../abap/5_syntax/_scope_type";
import {TypedIdentifier} from "../abap/types/_typed_identifier";
import {ISpaghettiScopeNode} from "../abap/5_syntax/_spaghetti_scope";
import {EditHelper, IEdit} from "../edit_helper";
import {ReferenceType} from "../abap/5_syntax/_reference";
import {Identifier} from "../abap/4_file_information/_identifier";
import {ABAPFile} from "../abap/abap_file";
import {StatementNode} from "../abap/nodes";
import {Comment, Unknown} from "../abap/2_statements/statements/_statement";
class WorkArea {
private readonly workarea: TypedIdentifier[] = [];
public push(id: TypedIdentifier) {
for (const w of this.workarea) {
if (id.equals(w)) {
return;
}
}
this.workarea.push(id);
}
public removeIfExists(id: Identifier) {
for (let i = 0; i < this.workarea.length; i++) {
if (id.equals(this.workarea[i])) {
this.workarea.splice(i, 1);
return;
}
}
}
public get(): readonly TypedIdentifier[] {
return this.workarea;
}
public count(): number {
return this.workarea.length;
}
}
export class UnusedTypesConf extends BasicRuleConfig {
/** skip specific names, case insensitive
* @uniqueItems true
*/
public skipNames?: string[] = [];
}
export class UnusedTypes implements IRule {
private conf = new UnusedTypesConf();
private reg: IRegistry;
private workarea: WorkArea;
public getMetadata(): IRuleMetadata {
return {
key: "unused_types",
title: "Unused types",
shortDescription: `Checks for unused TYPE definitions`,
extendedInformation: `Unused types are not reported if the object contains parser or syntax errors.`,
tags: [RuleTag.Quickfix],
pragma: "##NEEDED",
pseudoComment: "EC NEEDED",
};
}
public getConfig() {
return this.conf;
}
public setConfig(conf: UnusedTypesConf) {
this.conf = conf;
if (this.conf.skipNames === undefined) {
this.conf.skipNames = [];
}
}
public initialize(reg: IRegistry) {
this.reg = reg;
return this;
}
public run(obj: IObject): Issue[] {
if (!(obj instanceof ABAPObject)) {
return [];
}
for (const file of obj.getABAPFiles()) {
for (const statement of file.getStatements()) {
if (statement.get() instanceof Unknown) {
return []; // contains parser errors
}
}
}
// dont report unused variables when there are syntax errors
const syntax = new SyntaxLogic(this.reg, obj).run();
if (syntax.issues.length > 0) {
return [];
}
this.workarea = new WorkArea();
this.traverse(syntax.spaghetti.getTop(), obj, true);
this.traverse(syntax.spaghetti.getTop(), obj, false);
if (this.workarea.count() === 0) {
return []; // exit early if all types are used in the current object
}
for (const o of this.reg.getObjects()) {
if (o === obj) {
continue;
} else if (o instanceof ABAPObject) {
if (this.reg.isDependency(o)) {
continue; // do not search in dependencies
}
const syntax = new SyntaxLogic(this.reg, o).run();
this.traverse(syntax.spaghetti.getTop(), o, false);
}
if (this.workarea.count() === 0) {
return []; // exit early if all types are used
}
}
// what is left is unused
const ret: Issue[] = [];
for (const t of this.workarea.get()) {
const message = "Type \"" + t.getName() + "\" not used";
const file = obj.getABAPFileByName(t.getFilename());
if (file === undefined) {
continue;
}
const statement = EditHelper.findStatement(t.getToken(), file);
if (statement === undefined) {
continue;
}
if (statement.getPragmas().some(t => t.getStr() === this.getMetadata().pragma)) {
continue;
} else if (this.suppressedbyPseudo(statement, file)) {
continue;
}
const fix = this.buildFix(file, statement);
ret.push(Issue.atIdentifier(t, message, this.getMetadata().key, this.conf.severity, fix));
}
return ret;
}
private suppressedbyPseudo(statement: StatementNode | undefined, file: ABAPFile): boolean {
if (statement === undefined) {
return false;
}
if (file === undefined) {
return false;
}
let next = false;
for (const s of file.getStatements()) {
if (next === true && s.get() instanceof Comment) {
return s.concatTokens().includes(this.getMetadata().pseudoComment + "");
}
if (s === statement) {
next = true;
}
}
return false;
}
////////////////////////////
private traverse(node: ISpaghettiScopeNode, obj: ABAPObject, add: boolean) {
if (node.getIdentifier().stype !== ScopeType.BuiltIn) {
this.checkNode(node, obj, add);
}
for (const c of node.getChildren()) {
this.traverse(c, obj, add);
}
}
private checkNode(node: ISpaghettiScopeNode, obj: ABAPObject, add: boolean) {
const ret: Issue[] = [];
if (add === true) {
const types = node.getData().types;
for (const name in types) {
const identifier = types[name];
if (obj.containsFile(identifier.getFilename()) === false) {
continue;
} else if (this.conf.skipNames
&& this.conf.skipNames.length > 0
&& this.conf.skipNames.some((a) => a.toUpperCase() === name)) {
continue;
} else if (name !== identifier.getName().toUpperCase()) {
continue; // may have aliases via interfaces
}
this.workarea.push(identifier);
}
}
for (const r of node.getData().references) {
if (r.referenceType === ReferenceType.TypeReference && r.resolved) {
this.workarea.removeIfExists(r.resolved);
}
}
return ret;
}
private buildFix(file: ABAPFile, statement: StatementNode): IEdit | undefined {
if (statement.concatTokens().toUpperCase().includes("BEGIN OF")) {
return undefined;
}
return EditHelper.deleteStatement(file, statement);
}
} |