form-pdf2json
Version:
NodeJS library to convert pdf to json or vice versa
219 lines (218 loc) • 10.5 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
* There is no @types for utf8-fdf-generator
* So ignore tslint rule temporary
*/
// tslint:disable-next-line:no-var-requires
var fdf = require("utf8-fdf-generator").fdf;
// import { fdf } from "utf8-fdf-generator";
var change_case_1 = require("change-case");
var child_process_1 = require("child_process");
var fs_1 = require("fs");
var lodash_1 = require("lodash");
var helpers_1 = require("./helpers");
var Pdf2Json = /** @class */ (function () {
function Pdf2Json() {
var _this = this;
this.sourcePath = process.env.SOURCE_PATH || "files/";
this.outputPath = process.env.OUTPUT_PATH || "output/";
var files = this.getFiles();
files.forEach(function (fileName) { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
this.exportPdf2Json(fileName);
this.exportJson2Pdf(fileName);
return [2 /*return*/];
});
}); });
}
Pdf2Json.prototype.exportPdf2Json = function (fileName) {
return __awaiter(this, void 0, void 0, function () {
var formName, outputFilePath, data;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
formName = fileName.split(".")[0];
outputFilePath = "" + this.outputPath + formName + ".json";
return [4 /*yield*/, this.convertPdf2Json(fileName)];
case 1:
data = _a.sent();
this.exportFile(outputFilePath, data);
return [2 /*return*/];
}
});
});
};
Pdf2Json.prototype.convertPdf2Json = function (fileName) {
return __awaiter(this, void 0, void 0, function () {
var sourceFile, regStateOption, fieldArray, defaultIFields, stdout, fields;
return __generator(this, function (_a) {
sourceFile = "" + this.sourcePath + fileName;
regStateOption = /IFieldStateOption: ((?!Off)[A-Za-z\t .]+)/;
fieldArray = [];
defaultIFields = ["fieldName", "fieldType", "fieldFlags"];
try {
stdout = child_process_1.execFileSync("pdftk", [
sourceFile,
"dump_data_fields_utf8"
]);
fields = stdout
.toString()
.split("---")
.slice(1);
fields.forEach(function (field) {
var currentIField = {};
field.split("\n").forEach(function (fieldOption) {
if (!fieldOption) {
return;
}
var _a = fieldOption.split(": "), name = _a[0], value = _a[1];
if (defaultIFields.indexOf(change_case_1.camelCase(name)) === -1 || !value) {
return;
}
currentIField[change_case_1.camelCase(name)] = value;
});
if (!!currentIField.fieldType && currentIField.fieldType === "Button") {
currentIField.fieldStateOption = !!field.match(regStateOption)
? field.match(regStateOption)[1]
: "";
}
currentIField.fieldValue = "";
fieldArray.push(currentIField);
});
return [2 /*return*/, fieldArray];
}
catch (e) {
throw helpers_1.error(e);
}
return [2 /*return*/];
});
});
};
Pdf2Json.prototype.exportPdf2Fdf = function (fileName) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/];
});
});
};
Pdf2Json.prototype.convertJson2Fdf = function (fileName) {
return __awaiter(this, void 0, void 0, function () {
var data, keys, values, parsed;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.convertPdf2Json(fileName)];
case 1:
data = _a.sent();
keys = lodash_1.map(data, "fieldName");
values = lodash_1.map(data, "fieldValue");
parsed = values.map(function (val) {
if (val === true) {
return "Yes";
}
else if (val === false) {
return "Off";
}
return val;
});
return [2 /*return*/, lodash_1.zipObject(keys, parsed)];
}
});
});
};
Pdf2Json.prototype.exportJson2Pdf = function (fileName) {
return __awaiter(this, void 0, void 0, function () {
var sourceFile, outputFilePath, fdfData, randomSequence, currentTime, tempFDFFile, e_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 3, , 4]);
sourceFile = "" + this.sourcePath + fileName;
outputFilePath = "" + this.outputPath + fileName;
return [4 /*yield*/, this.convertJson2Fdf(fileName)];
case 1:
fdfData = _a.sent();
randomSequence = Math.random()
.toString(36)
.substring(7);
currentTime = new Date().getTime();
tempFDFFile = "temp_data" + currentTime + randomSequence + ".fdf";
fdf.generator(fdfData, tempFDFFile);
return [4 /*yield*/, child_process_1.execFileSync("pdftk", [
sourceFile,
"fill_form",
tempFDFFile,
"output",
outputFilePath
])];
case 2:
_a.sent();
// Delete the temporary fdf file.
fs_1.unlink(tempFDFFile, function (err) {
if (err) {
return helpers_1.error(err.message);
}
});
return [3 /*break*/, 4];
case 3:
e_1 = _a.sent();
throw helpers_1.error(e_1);
case 4: return [2 /*return*/];
}
});
});
};
Pdf2Json.prototype.exportFile = function (path, data) {
var jsonData = typeof data === "string" ? JSON.parse(data) : data;
var result = JSON.stringify(jsonData, null, "\t");
fs_1.writeFile(path, result, "utf8", function (err) {
if (err) {
return helpers_1.error("An error occured while writing JSON Object to File.");
}
helpers_1.comment("File export: " + path);
});
};
Pdf2Json.prototype.getFiles = function () {
helpers_1.comment("Get list of decrypt Pdf form files");
return fs_1.readdirSync(this.sourcePath);
};
return Pdf2Json;
}());
exports.default = Pdf2Json;
var a = new Pdf2Json();