library-ts/browser/text/lexer/parsing/Parser.ts

import { MultiString } from "../../../i18n/MultiString";
import { MessageType, MessageTypes } from "../../../messages/MessageType";

import { ParserMessage } from "./ParserMessage";
import { ParserPhase } from "./ParserPhase";
import { SourceInfo } from "./SourceInfo";

export abstract class Parser  
{
  _phases:ParserPhase<any>[] = [];
  _source:string;
  get source(){ return this._source; }
  _messages:ParserMessage[] = [];
  get messages():ParserMessage[]{ return this._messages }
  
  _add( phase:ParserPhase<any> )
  {
    this._phases.push( phase );
  }

  get hasErrors()
  {
    return this._messages.find( m => MessageTypes.Error == m.type );
  }

  _message( type:MessageType, content:string|MultiString, sourceInfo:SourceInfo )
  {
    this._messages.push( ParserMessage.create( type, MultiString.resolve( content ), sourceInfo ) );
  }

  verbose( content:string|MultiString, sourceInfo?:SourceInfo )
  {
    this._message( MessageTypes.Verbose, content, sourceInfo );
  }

  info( content:string|MultiString, sourceInfo?:SourceInfo )
  {
    this._message( MessageTypes.Info, content, sourceInfo );
  }

  warn( content:string|MultiString, sourceInfo?:SourceInfo )
  {
    this._message( MessageTypes.Warning, content, sourceInfo );
  }

  error( content:string|MultiString, sourceInfo?:SourceInfo )
  {
    this._message( MessageTypes.Error, content, sourceInfo );
  }


  parse( source:string )
  {
    this._source = source;
    
    for ( let phase of this._phases )
    {
      phase.reset();
    }

    for ( let phase of this._phases )
    {
      phase.process();

      if ( this.hasErrors )
      {
        this.error( "Stopped at: " + phase.phaseInfo );
        return;
      }
    }

    this.info( "Parsed successfully" );
  }
}