Rules not working

[keendule]

import { PdfReader } from 'pdfreader';
import { Rule } from 'pdfreader/Rule';

const processItem = Rule.makeItemProcessor([
Rule.on(/а/)
.extractRegexpValues()
.then((item) => console.log(item)),
]);

new PdfReader({}).parseFileItems('./pdf/1.pdf', (err, item) => {
if (err) console.error('error:', err);
else if (!item) console.warn('end of file');
else processItem(item);
});

What i need to paste in then() ?

[adrienjoly]

Here's what I think you want to do:

import { PdfReader, Rule } from "./index.js";

const processItem = Rule.makeItemProcessor([
  // detect the first text entry that contain "hello"
  Rule.on(/(hello.*)/i)
    .extractRegexpValues()
    .then((item) => {
      console.log("found match:", item); // => found match: [ 'Hello "world"' ]
    }),
  // trigger the rule above, as soon as "hello" is found in a text entry
  Rule.on(/hello/i).accumulateAfterHeading(),
]);

new PdfReader({}).parseFileItems("./test/sample.pdf", (err, item) => {
  if (err) console.error("error:", err);
  else if (!item) console.warn("end of file");
  else processItem(item);
});

[sebakthapa]

This is not working for me too.

I did the following to import

import { PdfReader, Rule } from 'pdfreader';

Importing Rule is giving me Module '"pdfreader"' has no exported member 'Rule'. This may be because of missing type declarations, so I used ts-ignore to ignore the error for testing.

Then running what was shown in the docs is not printing anything on the console

const displayValue = (val: unknown) => {
  console.log(val);
};

const displayTable = (val: unknown) => {
  console.log(val);
};

const processItem = Rule.makeItemProcessor([
  Rule.on(/^Hello "(.*)"$/)
    .extractRegexpValues()
    .then(displayValue),
  Rule.on(/^Value:/)
    .parseNextItemValue()
    .then(displayValue),
  Rule.on(/^c1$/).parseTable(3).then(displayTable),
  Rule.on(/^Values:/)
    .accumulateAfterHeading()
    .then(displayValue)
]);

new PdfReader().parseFileItems(pdfpath, (err, item) => {
  if (err) console.error(err);
  else {
    processItem(item);
  }
});

What actually is the issue here?
The pdfpath is correct and using it without Rule is working well.

[adrienjoly]

I was able to get the following output:

... from a basic nodejs project containing these files:

• package.json

{
  "name": "npm-pdfreader-test",
  "version": "1.0.0",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "description": "",
  "dependencies": {
    "pdfreader": "^3.0.5"
  }
}

• test-2.js

import { PdfReader, Rule } from "pdfreader";

const displayValue = (val) => {
  console.log(val);
};

const displayTable = (val) => {
  console.log(val);
};

const processItem = Rule.makeItemProcessor([
  Rule.on(/^Hello "(.*)"$/)
    .extractRegexpValues()
    .then(displayValue),
  Rule.on(/^Value:/)
    .parseNextItemValue()
    .then(displayValue),
  Rule.on(/^c1$/).parseTable(3).then(displayTable),
  Rule.on(/^Values:/)
    .accumulateAfterHeading()
    .then(displayValue),
]);

new PdfReader().parseFileItems("../npm-pdfreader/test/sample.pdf", (err, item) => {
  if (err) console.error(err);
  else {
    processItem(item);
  }
});

=> if you want help troubleshooting, please provide us access to a project (e.g. git repo) that we can checkout and run easily on our end.

[Basavarajrp]

@adrienjoly I have created the PR, I think this should solve this issue.

cc: @keendule @sebakthapa

[adrienjoly]

Thank you @Basavarajrp! I'm leaving for a few days trip. => I'll have a look at it in the coming days.