78 lines
2.8 KiB
TypeScript
78 lines
2.8 KiB
TypeScript
|
|
import { PdfFile, RepresentationType } from "../wrappers/PdfFile";
|
|
import { Operator, Progress, oneToOne } from ".";
|
|
|
|
import Joi from "@stirling-tools/joi";
|
|
import { JoiPDFFileSchema } from "../wrappers/PdfFileJoi";
|
|
|
|
import i18next from "i18next";
|
|
|
|
import { getPages } from "./common/getPagesByIndex";
|
|
import { parsePageIndexSpecification } from "./common/pageIndexesUtils";
|
|
|
|
export interface ExtractPagesParamsType {
|
|
file: PdfFile;
|
|
pageIndexes: string | number[];
|
|
}
|
|
export async function extractPages(params: ExtractPagesParamsType): Promise<PdfFile> {
|
|
const { file, pageIndexes } = params;
|
|
const pdfLibDocument = await file.pdfLibDocument;
|
|
|
|
let indexes = pageIndexes;
|
|
|
|
if (!Array.isArray(indexes)) {
|
|
indexes = parsePageIndexSpecification(indexes, pdfLibDocument.getPageCount());
|
|
}
|
|
|
|
const newFile = await getPages(file, indexes);
|
|
newFile.filename += "_extractedPages";
|
|
return newFile;
|
|
}
|
|
|
|
|
|
export class ExtractPages extends Operator {
|
|
static type = "extractPages";
|
|
|
|
/**
|
|
* Validation & Localisation
|
|
*/
|
|
|
|
protected static inputSchema = JoiPDFFileSchema.label(i18next.t("inputs.pdffile.name")).description(i18next.t("inputs.pdffile.description"));
|
|
protected static valueSchema = Joi.object({
|
|
pageIndexes: Joi.array().items(Joi.number().integer()).required()
|
|
.label(i18next.t("values.pageIndexes.friendlyName", { ns: "extractPages" })).description(i18next.t("values.pageIndexes.description", { ns: "extractPages" }))
|
|
.example("3").example("4").required()
|
|
});
|
|
protected static outputSchema = JoiPDFFileSchema.label(i18next.t("outputs.pdffile.name")).description(i18next.t("outputs.pdffile.description"));
|
|
|
|
static schema = Joi.object({
|
|
input: ExtractPages.inputSchema,
|
|
values: ExtractPages.valueSchema.required(),
|
|
output: ExtractPages.outputSchema
|
|
}).label(i18next.t("friendlyName", { ns: "extractPages" })).description(i18next.t("description", { ns: "extractPages" }));
|
|
|
|
|
|
/**
|
|
* Logic
|
|
*/
|
|
|
|
/** PDF-Imposition, PDF-N-Up: Put multiple pages of the input document into a single page of the output document. - see: {@link https://en.wikipedia.org/wiki/N-up} */
|
|
async run(input: PdfFile[], progressCallback: (state: Progress) => void): Promise<PdfFile[]> {
|
|
return oneToOne<PdfFile, PdfFile>(input, async (input, index, max) => {
|
|
const pdfLibDocument = await input.pdfLibDocument;
|
|
|
|
let indexes = this.actionValues.pageIndexes;
|
|
|
|
if (!Array.isArray(indexes)) {
|
|
indexes = parsePageIndexSpecification(indexes, pdfLibDocument.getPageCount());
|
|
}
|
|
|
|
const newFile = await getPages(input, indexes);
|
|
newFile.filename += "_extractedPages";
|
|
progressCallback({ curFileProgress: 1, operationProgress: index/max });
|
|
|
|
return newFile;
|
|
});
|
|
}
|
|
}
|