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import {AbstractType} from "../../types/basic/_abstract_type";
import {INode} from "../../nodes/_inode";
import * as Expressions from "../../2_statements/expressions";
import {Dash, DashW, InstanceArrow} from "../../1_lexer/tokens";
import {StructureType, ObjectReferenceType, VoidType, DataReference, TableType, UnknownType, GenericObjectReferenceType} from "../../types/basic";
import {ComponentName} from "./component_name";
import {AttributeName} from "./attribute_name";
import {ReferenceType} from "../_reference";
import {FieldOffset} from "./field_offset";
import {FieldLength} from "./field_length";
import {TableExpression} from "./table_expression";
import {Dereference as DereferenceExpression} from "../../2_statements/expressions";
import {Dereference} from "./dereference";
import {SourceFieldSymbol} from "./source_field_symbol";
import {SourceField} from "./source_field";
import {isFieldSymbolItself, substringType} from "./_substring";
import {CheckSyntaxKey, SyntaxInput, syntaxIssue} from "../_syntax_input";
import {LanguageVersion, Release, releaseAtLeast} from "../../../version";
export class FieldChain {
public static runSyntax(
node: ExpressionNode,
input: SyntaxInput,
refType?: ReferenceType | ReferenceType[] | undefined,
allowGenericDeference = false): AbstractType | undefined {
if (node.getFirstChild()?.get() instanceof Expressions.SourceField
&& node.findDirectExpression(Expressions.ComponentName)) {
// workaround for names with dashes, eg. "sy-repid"
const concat = node.concatTokens().replace(/ /g, "");
const offset = node.findDirectExpression(Expressions.FieldOffset)?.concatTokens().replace(/ /g, "") || "";
const length = node.findDirectExpression(Expressions.FieldLength)?.concatTokens().replace(/ /g, "") || "";
const found = input.scope.findVariable(concat.replace(offset, "").replace(length, ""));
if (found) {
if (refType) {
input.scope.addReference(node.getFirstToken(), found, refType, input.filename);
}
// this is not completely correct, but will work, dashes in names is a mess anyhow
return found.getType();
}
}
let context: AbstractType | undefined;
const children = node.getChildren();
context = this.findTop(children[0], input, refType);
let prev = children[0].concatTokens();
for (let i = 1; i < children.length; i++) {
const current = children[i];
if (current === undefined) {
break;
}
if (current.get() instanceof DashW) {
const message = "Ending with dash";
input.issues.push(syntaxIssue(input, current.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
} else if (current.get() instanceof Dash) {
if (context instanceof UnknownType) {
/*
const message = "Not a structure, type unknown, FieldChain";
input.issues.push(syntaxIssue(input, current.getFirstToken(), message));
*/
return VoidType.get(CheckSyntaxKey);
} else if (!(context instanceof StructureType)
&& !(context instanceof TableType && context.isWithHeader())
&& !(context instanceof VoidType)) {
if (context instanceof TableType && context.isWithHeader() === false) {
let contextName = "";
for (let j = 0; j < i; j++) {
contextName += children[j].concatTokens();
}
if (input.scope.isAllowHeaderUse(contextName)) {
// FOR ALL ENTRIES workaround
context = context.getRowType();
if (!(context instanceof StructureType) && !(context instanceof VoidType)) {
context = new StructureType([{name: "TABLE_LINE", type: context}]);
}
} else {
const message = "Table without header, cannot access fields, " + contextName;
input.issues.push(syntaxIssue(input, current.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
} else {
const message = prev.toUpperCase() + " is not structured (" + context?.constructor.name + ")";
input.issues.push(syntaxIssue(input, current.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
}
} else if (current.get() instanceof InstanceArrow) {
if (!(context instanceof ObjectReferenceType)
&& !(context instanceof DataReference)
&& !(context instanceof VoidType)) {
const message = "Not an object reference, field chain";
input.issues.push(syntaxIssue(input, current.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
} else if (current.get() instanceof DereferenceExpression) {
context = Dereference.runSyntax(current, context, input);
if (allowGenericDeference === false
&& context?.isGeneric() === true
&& !releaseAtLeast(input.scope.getRelease(), Release.v756)
&& input.scope.getLanguageVersion() !== LanguageVersion.Cloud
&& !input.scope.getOpenABAP()) {
throw new Error("A generic reference cannot be dereferenced");
}
} else if (current.get() instanceof Expressions.ComponentName) {
if (context instanceof TableType && context.isWithHeader()) {
context = context.getRowType();
}
context = ComponentName.runSyntax(context, current, input);
} else if (current instanceof ExpressionNode
&& current.get() instanceof Expressions.TableExpression) {
if (!(context instanceof TableType) && !(context instanceof VoidType) && !(context instanceof UnknownType)) {
const message = "Table expression, expected table";
input.issues.push(syntaxIssue(input, current.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
TableExpression.runSyntax(current, input, context);
if (!(context instanceof VoidType) && !(context instanceof UnknownType)) {
context = context.getRowType();
}
} else if (current.get() instanceof Expressions.AttributeName) {
context = AttributeName.runSyntax(context, current, input, refType);
} else if (current.get() instanceof Expressions.FieldOffset && current instanceof ExpressionNode) {
const offset = FieldOffset.runSyntax(current, input);
if (!isFieldSymbolItself(children, i)) {
context = substringType(context, offset, undefined, current, input);
}
} else if (current.get() instanceof Expressions.FieldLength && current instanceof ExpressionNode) {
const length = FieldLength.runSyntax(current, input);
if (!isFieldSymbolItself(children, i)) {
context = substringType(context, undefined, length, current, input);
}
}
prev = current.concatTokens();
}
return context;
}
////////////////
private static findTop(
node: INode | undefined,
input: SyntaxInput,
type: ReferenceType | ReferenceType[] | undefined): AbstractType | undefined {
if (node === undefined) {
return undefined;
}
if (node instanceof ExpressionNode
&& node.get() instanceof Expressions.SourceFieldSymbol) {
return SourceFieldSymbol.runSyntax(node, input);
} else if (node instanceof ExpressionNode
&& node.get() instanceof Expressions.SourceField) {
return SourceField.runSyntax(node, input, type);
} else if (node instanceof ExpressionNode
&& node.get() instanceof Expressions.Field) {
return SourceField.runSyntax(node, input, type);
} else if (node.get() instanceof Expressions.ClassName) {
const classTok = node.getFirstToken();
const classNam = classTok.getStr();
if (classNam.toUpperCase() === "OBJECT") {
return new GenericObjectReferenceType();
}
const found = input.scope.existsObject(classNam);
if (found?.id) {
input.scope.addReference(classTok, found.id, ReferenceType.ObjectOrientedReference, input.filename);
return new ObjectReferenceType(found.id);
} else if (input.scope.getDDIC().inErrorNamespace(classNam) === false) {
input.scope.addReference(classTok, undefined,
ReferenceType.ObjectOrientedVoidReference, input.filename, {ooName: classNam.toUpperCase()});
return VoidType.get(classNam);
} else {
const message = "Unknown class " + classNam;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
}
return undefined;
}
}
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