Result.ts
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import { Converter } from "./Converter";
import { ProcessLineResult } from "./Processor";
import P from "bluebird";
import CSVError from "./CSVError";
export class Result {
private get needEmitLine(): boolean {
return !!this.converter.parseRuntime.subscribe && !!this.converter.parseRuntime.subscribe.onNext || this.needPushDownstream
}
private _needPushDownstream?: boolean;
private get needPushDownstream(): boolean {
if (this._needPushDownstream === undefined) {
this._needPushDownstream = this.converter.listeners("data").length > 0 || this.converter.listeners("readable").length > 0;
}
return this._needPushDownstream;
}
private get needEmitAll(): boolean {
return !!this.converter.parseRuntime.then;
}
private finalResult: any[] = [];
constructor(private converter: Converter) { }
processResult(resultLines: ProcessLineResult[]): P<any> {
const startPos = this.converter.parseRuntime.parsedLineNumber;
// let prom: P<any>;
return new P((resolve, reject) => {
if (this.needEmitLine) {
processLineByLine(
resultLines,
this.converter,
0,
this.needPushDownstream,
(err) => {
if (err) {
reject(err);
} else {
this.appendFinalResult(resultLines);
resolve();
}
},
)
// resolve();
} else {
this.appendFinalResult(resultLines);
resolve();
}
})
}
appendFinalResult(lines: any[]) {
if (this.needEmitAll) {
this.finalResult = this.finalResult.concat(lines);
}
this.converter.parseRuntime.parsedLineNumber += lines.length;
}
processError(err: CSVError) {
if (this.converter.parseRuntime.subscribe && this.converter.parseRuntime.subscribe.onError) {
this.converter.parseRuntime.subscribe.onError(err);
}
if (this.converter.parseRuntime.then && this.converter.parseRuntime.then.onrejected) {
this.converter.parseRuntime.then.onrejected(err);
}
}
endProcess() {
if (this.needEmitAll) {
if (this.converter.parseRuntime.then && this.converter.parseRuntime.then.onfulfilled) {
this.converter.parseRuntime.then.onfulfilled(this.finalResult);
}
}
if (this.converter.parseRuntime.subscribe && this.converter.parseRuntime.subscribe.onCompleted) {
this.converter.parseRuntime.subscribe.onCompleted();
}
}
}
function processLineByLine(
lines: ProcessLineResult[],
conv: Converter,
offset: number,
needPushDownstream: boolean,
cb: (err?) => void,
) {
if (offset >= lines.length) {
cb();
} else {
if (conv.parseRuntime.subscribe && conv.parseRuntime.subscribe.onNext) {
const hook = conv.parseRuntime.subscribe.onNext;
const nextLine = lines[offset];
const res = hook(nextLine, conv.parseRuntime.parsedLineNumber + offset);
offset++;
// if (isAsync === undefined) {
if (res && res.then) {
res.then(function () {
processRecursive(lines, hook, conv, offset, needPushDownstream, cb, nextLine);
}, cb);
} else {
// processRecursive(lines, hook, conv, offset, needPushDownstream, cb, nextLine, false);
if (needPushDownstream){
pushDownstream(conv,nextLine);
}
while (offset<lines.length){
const line=lines[offset];
hook(line, conv.parseRuntime.parsedLineNumber + offset);
offset++;
if (needPushDownstream){
pushDownstream(conv,line);
}
}
cb();
}
// } else if (isAsync === true) {
// (res as PromiseLike<void>).then(function () {
// processRecursive(lines, hook, conv, offset, needPushDownstream, cb, nextLine, true);
// }, cb);
// } else if (isAsync === false) {
// processRecursive(lines, hook, conv, offset, needPushDownstream, cb, nextLine, false);
// }
} else {
if (needPushDownstream) {
while (offset<lines.length) {
const line = lines[offset++];
pushDownstream(conv, line);
}
}
cb();
}
}
}
function processRecursive(
lines: ProcessLineResult[],
hook: (data: any, lineNumber: number) => void | PromiseLike<void>,
conv: Converter,
offset: number,
needPushDownstream: boolean,
cb: (err?) => void,
res: ProcessLineResult,
) {
if (needPushDownstream) {
pushDownstream(conv, res);
}
processLineByLine(lines, conv, offset, needPushDownstream, cb);
}
function pushDownstream(conv: Converter, res: ProcessLineResult) {
if (typeof res === "object" && !conv.options.objectMode) {
conv.push(JSON.stringify(res) + "\n", "utf8");
} else {
conv.push(res);
}
}