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import P from "bluebird";
import { prepareData } from "./dataClean";
import getEol from "./getEol";
import { stringToLines } from "./fileline";
import { bufFromString, filterArray } from "./util";
import { RowSplit } from "./rowSplit";
import lineToJson from "./lineToJson";
import { ParseRuntime } from "./ParseRuntime";
export class ProcessorLocal extends Processor {
private rowSplit: RowSplit = new RowSplit(this.converter);
private eolEmitted = false;
private _needEmitEol?: boolean = undefined;
private get needEmitEol() {
if (this._needEmitEol === undefined) {
this._needEmitEol = this.converter.listeners("eol").length > 0;
}
return this._needEmitEol;
}
private headEmitted = false;
private _needEmitHead?: boolean = undefined;
private get needEmitHead() {
Eif (this._needEmitHead === undefined) {
this._needEmitHead = this.converter.listeners("header").length > 0;
}
return this._needEmitHead;
}
process(chunk: Buffer, finalChunk = false): P<ProcessLineResult[]> {
let csvString: string;
if (finalChunk) {
csvString = chunk.toString();
} else {
csvString = prepareData(chunk, this.converter.parseRuntime);
}
return P.resolve()
.then(() => {
if (this.runtime.preRawDataHook) {
return this.runtime.preRawDataHook(csvString);
} else {
return csvString;
}
})
.then((csv) => {
Eif (csv && csv.length > 0) {
return this.processCSV(csv, finalChunk);
} else {
return P.resolve([]);
}
})
}
private processCSV(csv: string, finalChunk: boolean): P<ProcessLineResult[]> {
const params = this.params;
const runtime = this.runtime;
if (!runtime.eol) {
getEol(csv, runtime);
}
if (this.needEmitEol && !this.eolEmitted && runtime.eol) {
this.converter.emit("eol", runtime.eol);
this.eolEmitted = true;
}
// trim csv file has initial blank lines.
if (params.ignoreEmpty && !runtime.started) {
csv = csv.trimLeft();
}
const stringToLineResult = stringToLines(csv, runtime);
if (!finalChunk) {
this.prependLeftBuf(bufFromString(stringToLineResult.partial));
} else {
stringToLineResult.lines.push(stringToLineResult.partial);
stringToLineResult.partial = "";
}
if (stringToLineResult.lines.length > 0) {
let prom: P<string[]>;
if (runtime.preFileLineHook) {
prom = this.runPreLineHook(stringToLineResult.lines);
} else {
prom = P.resolve(stringToLineResult.lines);
}
return prom.then((lines) => {
if (!runtime.started
&& !this.runtime.headers
) {
return this.processDataWithHead(lines);
} else {
return this.processCSVBody(lines);
}
})
} else {
return P.resolve([]);
}
}
private processDataWithHead(lines: string[]): ProcessLineResult[] {
if (this.params.noheader) {
if (this.params.headers) {
this.runtime.headers = this.params.headers;
} else {
this.runtime.headers = [];
}
} else {
let left = "";
let headerRow: string[] = [];
while (lines.length) {
const line = left + lines.shift();
const row = this.rowSplit.parse(line);
if (row.closed) {
headerRow = row.cells;
left = "";
break;
} else {
left = line + getEol(line, this.runtime);
}
}
this.prependLeftBuf(bufFromString(left));
if (headerRow.length === 0) {
return [];
}
if (this.params.headers) {
this.runtime.headers = this.params.headers;
} else {
this.runtime.headers = headerRow;
}
}
if (this.runtime.needProcessIgnoreColumn || this.runtime.needProcessIncludeColumn) {
this.filterHeader();
}
if (this.needEmitHead && !this.headEmitted) {
this.converter.emit("header", this.runtime.headers);
this.headEmitted = true;
}
return this.processCSVBody(lines);
}
private filterHeader() {
this.runtime.selectedColumns = [];
Eif (this.runtime.headers) {
const headers = this.runtime.headers;
for (let i = 0; i < headers.length; i++) {
if (this.params.ignoreColumns) {
if (this.params.ignoreColumns.test(headers[i])) {
Iif (this.params.includeColumns && this.params.includeColumns.test(headers[i])) {
this.runtime.selectedColumns.push(i);
} else {
continue;
}
} else {
this.runtime.selectedColumns.push(i);
}
} else Eif (this.params.includeColumns) {
if (this.params.includeColumns.test(headers[i])) {
this.runtime.selectedColumns.push(i);
}
} else {
this.runtime.selectedColumns.push(i);
}
// if (this.params.includeColumns && this.params.includeColumns.test(headers[i])){
// this.runtime.selectedColumns.push(i);
// }else{
// if (this.params.ignoreColumns && this.params.ignoreColumns.test(headers[i])){
// continue;
// }else{
// if (this.params.ignoreColumns && !this.params.includeColumns){
// this.runtime.selectedColumns.push(i);
// }
// }
// }
}
this.runtime.headers = filterArray(this.runtime.headers, this.runtime.selectedColumns);
}
}
private processCSVBody(lines: string[]): ProcessLineResult[] {
if (this.params.output === "line") {
return lines;
} else {
const result = this.rowSplit.parseMultiLines(lines);
this.prependLeftBuf(bufFromString(result.partial));
if (this.params.output === "csv") {
return result.rowsCells;
} else {
return lineToJson(result.rowsCells, this.converter);
}
}
// var jsonArr = linesToJson(lines.lines, params, this.recordNum);
// this.processResult(jsonArr);
// this.lastIndex += jsonArr.length;
// this.recordNum += jsonArr.length;
}
private prependLeftBuf(buf: Buffer) {
Eif (buf) {
if (this.runtime.csvLineBuffer) {
this.runtime.csvLineBuffer = Buffer.concat([buf, this.runtime.csvLineBuffer]);
} else {
this.runtime.csvLineBuffer = buf;
}
}
}
private runPreLineHook(lines: string[]): P<string[]> {
return new P((resolve,reject)=>{
processLineHook(lines,this.runtime,0,(err)=>{
Iif (err){
reject(err);
}else{
resolve(lines);
}
})
});
}
}
function processLineHook(lines: string[], runtime: ParseRuntime, offset: number,
cb: (err?) => void
) {
Iif (lines.length === 0) {
cb();
} else {
Eif (runtime.preFileLineHook) {
const line = lines[offset];
const res = runtime.preFileLineHook(line, runtime.parsedLineNumber + offset);
offset++;
Iif (res && (res as PromiseLike<string>).then) {
(res as PromiseLike<string>).then((value) => {
lines[offset - 1] = value;
processLineHook(lines, runtime, offset, cb);
});
} else {
lines[offset - 1] = res as string;
while (offset < lines.length) {
lines[offset] = runtime.preFileLineHook(lines[offset], runtime.parsedLineNumber + offset) as string;
offset++;
}
cb();
}
} else {
cb();
}
}
} |