Document
The Document Aptitude provides the ability to interact with documents (currently only XLSX files).
API
Example
Permissions
readPDF provides the ability to input a PDF as a Uint8Array (either from the Filesystem or Network Aptitudes) and parse the text content inside it.import { document, filesystem } from '@oliveai/ldk';
const pdfFile = await filesystem.readFile('./earnings-report.pdf');
const pdfContent = await document.readPDF(pdfFile);
const expected = {
// "1" is the page number
"1": {
"Content": [
{"Value": "Test text", "Type": "text"},
{"Value": "", "Type": "newLine"},
{"Value": "More text on the next line", "Type": "text"},
{"Value": "base64 string", "Type": "photo"},
]
}
}
console.log(pdfContent === expected)
// true
readPDFwithOcr is an enhanced function for readPDF , it provides the ability to input a PDF as a Uint8Array (either from the Filesystem or Network Aptitudes) and parse the text content inside it including ocr any images with text. NOTE: this function will need to have screen permission, check permission tab in Screen Aptitude.import { document, filesystem } from '@oliveai/ldk';
const pdfFile = await filesystem.readFile('./test.pdf');
const pdfContent = await document.readPDFwithOcr(pdfFile);
const expected = {
// "1" is the page number
"1": {
"Content": [
{"Value": "Test text", "Type": "text"},
{"Value": "", "Type": "newLine"},
{"Value": "More text on the next line", "Type": "text"},
{"Value": "base64 string", "Type": "photo"},
{"value": "Text from image", "Type": "photoText"},
]
}
}
console.log(pdfContent === expected)
//true
xlsxEncode provides ability to encode a workbook object into XLSX data. It returns A promise of Uint8Array. import { document } from '@oliveai/ldk';
// Imagine that we have a workbook, that workbook contains a worksheet.
// To locate a single cell, we need the row numbner and cell number.
// We need a workbook object
const workbook = {
worksheets: [
{
hidden: false,
hiddenColumns: [],
hiddenRows: [],
name: 'name',
rows: [{ cells: [{ value: 'cell value' }] }],
},
],
};
const uint8ArrayData = await document.xlsxEncode(workbook);
xlsxDecode Decodes uint8Array into a Workbook Object. It returns a promise of Workbook.import { document } from '@oliveai/ldk';
// Decode Uint8Array to a Workbook Object.
// The uint8ArrayData is the same as the one we get from xlsxEncode method.
const workbook = document.xlsxDecode(uint8ArrayData);
This is the structure of a workbook:
Workbook: { worksheets: Worksheet[];}
Worksheet: { hidden: boolean; // Representation of a basic workbook with a single sheet where some rows and columns are hidden hiddenColumns: number[]; hiddenRows: number[]; name: string; rows: Row[];}
Row: { cells:cell[];}
Cell: { value:string;}Imagine that you want to read a patient's workbook programmatically. A good way to achieve this is to convert a workbook into xlsx data, which is an
Uint8Array if using xlsxEncode(). In this example we created a Workbook object for demonstration, but you can use any XLSX file (workbook file with .xlsx extension) to achieve this.
Let's look at an example to better illustrate the point.
import { document } from '@oliveai/ldk';
import { Workbook } from '@oliveai/ldk/dist/document/types';
// Create a workbook Object.
const workbook: Workbook = {
worksheets: [
{
hidden: false,
hiddenColumns: [],
hiddenRows: [],
name: 'Iron Man',
rows: [{ cells: [{ value: 'Age' }, {value: '48'}] }],
},
],
};
// Use xlseEncode to convert workbook Object to Uint8Array
const uint8ArrayData = document.xlsxEncode(JSON.stringify(workbook));
// Convert uint8Array data to workbook Object
const convertedWorkbook = document.xlsxDecode(uint8ArrayData);
// Check cell Data of converted workbook
const cellData = convertedWorkbook.worksheets[0].rows[0].cells[1].value;
console.log('workbook is:', JSON.stringify(workbook));
console.log('uint8ArrayData is: ', uint8ArrayData);
// The console log results are attached below
// workbook is: {"worksheets":[{"hidden":false,"hiddenColumns":[],"hiddenRows":[],"name":"Iron Man","rows":[{"cells":[{"value":"Age"},{"value":"48"}]}]}]}
// uint8ArrayData is: 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91,137,222,170,255,155,201,162,122,139,15,62,235,187,127,15,138,168,191,7,0,0,255,255,80,75,7,8,159,99,127,136,158,0,0,0,196,0,0,0,80,75,3,4,20,0,8,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,13,0,0,0,120,108,47,115,116,121,108,101,115,46,120,109,108,164,152,95,143,219,42,22,192,223,247,83,32,191,207,216,164,73,38,19,217,174,86,173,42,85,234,174,70,106,87,234,43,193,56,65,195,31,11,112,150,244,234,126,247,43,112,140,157,56,51,165,78,164,216,228,152,243,3,14,231,143,73,254,209,114,6,142,68,105,42,69,145,192,199,44,1,68,96,89,81,177,47,146,255,253,248,242,176,73,128,54,72,84,136,73,65,138,228,68,116,242,177,252,87,174,205,137,145,239,7,66,12,0,150,51,161,139,228,96,76,179,77,83,141,15,132,35,253,40,27,34,44,103,181,84,28,25,253,40,213,62,213,141,34,168,210,78,139,179,116,145,101,235,148,35,42,146,142,176,69,77,12,68,214,53,197,228,179,196,45,39,194,116,20,98,13,17,21,169,30,26,37,27,162,12,37,186,135,202,217,80,220,106,35,249,13,36,138,33,86,10,253,159,138,253,173,117,226,25,250,248,128,148,9,128,74,205,69,124,238,100,129,36,121,148,125,174,81,146,55,200,208,29,101,212,156,122,86,181,231,51,80,21,69,123,133,120,15,97,115,140,195,36,126,37,213,39,36,142,40,108,82,67,231,144,26,138,77,171,72,15,177,179,12,61,114,243,43,115,71,209,110,249,162,34,12,25,42,133,62,208,38,44,177,138,10,186,183,93,251,39,103,61,42,106,231,110,145,56,50,135,96,173,24,200,111,114,128,102,81,16,255,232,27,221,41,164,78,83,8,143,218,122,142,212,107,219,60,92,248,178,103,133,245,184,132,119,197,225,20,43,169,101,109,30,177,228,103,139,164,196,98,114,99,45,92,203,56,125,175,153,193,243,182,180,52,36,154,169,69,223,214,71,216,208,35,249,25,34,187,105,166,222,246,182,54,150,71,162,94,208,158,188,40,57,120,24,174,232,52,61,188,3,241,243,239,29,228,171,232,172,77,165,120,65,130,4,95,195,230,15,144,156,24,84,33,131,82,44,133,33,194,252,56,53,33,58,133,185,81,118,98,80,157,247,235,176,81,236,79,22,25,48,76,138,253,203,164,56,240,105,117,136,96,13,69,198,203,254,109,140,162,187,214,140,176,154,138,215,223,144,169,120,77,23,25,204,46,139,13,92,198,77,232,156,196,220,196,158,210,77,186,152,148,156,63,7,193,236,102,209,65,179,72,227,69,53,116,198,178,96,54,73,239,177,144,73,210,122,78,159,47,38,100,227,205,211,39,11,152,189,83,40,44,92,162,105,18,139,159,27,194,67,145,136,116,238,209,254,111,174,171,50,215,50,118,121,126,2,217,211,36,151,85,123,30,139,184,216,178,171,153,88,184,138,131,92,155,5,102,41,132,151,123,6,23,115,109,12,97,10,71,54,182,112,53,155,228,167,53,66,69,38,237,9,103,153,42,114,164,238,53,126,64,45,102,178,86,129,181,24,96,31,102,194,214,1,246,97,128,69,122,194,59,176,229,0,155,235,17,3,108,53,192,214,119,195,134,247,7,245,116,55,236,105,128,109,238,134,109,6,216,243,221,176,231,1,6,179,187,105,48,27,225,224,253,56,56,194,205,13,131,17,110,20,7,240,254,64,128,163,72,136,77,138,239,225,70,177,48,59,61,142,112,67,52,192,185,209,176,156,38,219,245,29,233,40,91,156,97,28,111,191,238,133,84,104,199,72,145,96,184,4,254,197,4,32,184,4,254,165,0,88,247,245,50,95,67,65,165,27,224,203,23,240,21,8,88,184,2,62,243,3,159,181,129,85,192,170,5,176,234,3,176,106,9,172,90,1,171,214,192,170,39,96,213,6,88,245,12,156,131,187,11,116,23,215,21,186,190,142,165,60,204,125,215,192,175,16,112,9,184,5,252,8,36,56,134,234,25,121,12,224,8,143,170,232,230,242,44,17,121,20,112,140,112,28,185,66,28,139,164,85,98,123,214,127,8,250,238,8,180,229,8,111,143,195,129,80,190,215,183,27,235,124,235,53,222,165,119,100,181,109,105,85,36,127,101,231,207,67,150,101,240,161,111,117,151,254,243,119,82,230,181,20,70,3,44,91,97,138,4,158,5,101,174,127,129,35,98,69,2,157,40,213,191,202,28,75,38,21,48,7,194,73,215,49,245,146,50,23,136,147,174,243,39,196,232,78,81,247,204,9,203,188,70,156,178,83,247,112,225,196,157,192,53,252,40,254,166,203,188,166,140,133,73,184,142,78,80,230,13,50,134,40,241,133,50,6,206,109,119,54,41,18,33,5,113,184,81,7,7,243,183,223,168,238,21,58,193,197,234,45,109,127,211,101,190,147,170,34,234,194,48,157,168,204,25,169,221,212,187,155,162,251,131,251,117,190,27,217,148,121,234,175,59,105,140,228,101,158,246,13,247,150,37,5,114,131,140,154,61,245,220,208,101,142,9,99,223,205,137,145,159,245,197,248,182,6,162,229,95,184,249,90,21,73,150,0,103,187,190,73,25,59,55,59,76,247,163,204,83,91,187,141,26,17,59,254,221,104,96,235,233,24,1,239,7,187,24,33,72,129,243,140,34,249,175,59,182,178,1,3,118,45,101,134,138,0,13,10,227,182,46,243,202,14,83,247,29,157,160,204,141,203,86,151,195,102,9,168,72,141,90,102,94,232,81,26,255,176,72,134,246,55,183,101,112,29,122,253,8,136,34,25,218,255,33,21,109,185,119,222,209,24,46,38,194,191,179,229,63,1,0,0,255,255,80,75,7,8,163,250,220,212,193,4,0,0,226,21,0,0,80,75,1,2,20,0,20,0,8,0,8,0,0,0,0,0,232,197,0,177,95,1,0,0,231,4,0,0,19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,91,67,111,110,116,101,110,116,95,84,121,112,101,115,93,46,120,109,108,80,75,1,2,20,0,20,0,8,0,8,0,0,0,0,0,55,48,252,24,76,5,0,0,117,25,0,0,19,0,0,0,0,0,0,0,0,0,0,0,0,0,160,1,0,0,120,108,47,116,104,101,109,101,47,116,104,101,109,101,49,46,120,109,108,80,75,1,2,20,0,20,0,8,0,8,0,0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In this example, we created a
Workbook Object and use xlsxEncode to encode our workbook to Uint8Array. Since Uint8Array represents an array of 8-bit unsigned integer, which means it's not that easy for people to identify its content and value. You may need to convert it to string so it's gonna be readable. But right now we'll skip this part and leave it to you to decide whether you want to convert the Uint8Array data to something else. So we converted the Uint8Array back to a workbook to check if we can still get the same value. To use the Document Aptitude, simply set the following permissions in your
package.json under the ldk object.
...
"ldk": {
"permissions": {
"document": {},
...
}
},
...
Last modified 1yr ago