smart-docs-parser
Version:
Document Details Parsing using OCR
138 lines • 7.54 kB
JavaScript
;
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.");
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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; }
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}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var lodash_1 = __importDefault(require("lodash"));
var ocr_1 = __importDefault(require("./ocr"));
var document_parser_1 = __importDefault(require("./document-parser"));
var constants_1 = __importDefault(require("./constants"));
var config_1 = __importDefault(require("config"));
var SmartDocuments = {};
// ******************************************************* //
// Logic for internal functions starts here //
// ******************************************************* //
var getAPIKeyFromConfig = function (ocrLibrary) {
if (config_1.default.has("smart-docs-parser.api_keys")) {
var apiKeys = config_1.default.get("smart-docs-parser.api_keys");
return lodash_1.default.get(apiKeys, "" + ocrLibrary, "");
}
return "";
};
var extractRawText = function (documentURL, ocrLibrary, customOCR, ocrTimeout) { return __awaiter(void 0, void 0, void 0, function () {
var apiKey;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
apiKey = getAPIKeyFromConfig(ocrLibrary);
if (!!lodash_1.default.isEmpty(customOCR)) return [3 /*break*/, 2];
return [4 /*yield*/, customOCR.extractDocumentText({
document_url: documentURL,
api_key: apiKey,
timeout: ocrTimeout
})];
case 1: return [2 /*return*/, _a.sent()];
case 2: return [4 /*yield*/, ocr_1.default[ocrLibrary].extractDocumentText({
document_url: documentURL,
api_key: apiKey,
timeout: ocrTimeout
})];
case 3: return [2 /*return*/, _a.sent()];
}
});
}); };
var validateDocumentText = function (rawText) {
var numberOfLines = lodash_1.default.size(rawText);
if (!numberOfLines || numberOfLines > constants_1.default.MAX_LINES) {
return false;
}
return true;
};
var parseDocumentDetails = function (documentType, rawText, customParser) { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!!lodash_1.default.isEmpty(customParser)) return [3 /*break*/, 2];
return [4 /*yield*/, customParser.parseDocumentDetails({
raw_text: rawText
})];
case 1: return [2 /*return*/, _a.sent()];
case 2: return [4 /*yield*/, document_parser_1.default[documentType].parseDocumentDetails({
raw_text: rawText
})];
case 3: return [2 /*return*/, _a.sent()];
}
});
}); };
// ******************************************************* //
// Logic for internal functions ends here //
// ******************************************************* //
// ******************************************************* //
// Logic for API handlers starts here //
// ******************************************************* //
SmartDocuments.extractDocumentDetailsFromImage = function (params) { return __awaiter(void 0, void 0, void 0, function () {
var documentType, documentURL, ocrLibrary, customParser, customOCR, ocrTimeout, ocrResponse, rawText, isValidText, documentDetails;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
documentType = params.document_type, documentURL = params.document_url, ocrLibrary = params.ocr_library, customParser = params.custom_parser, customOCR = params.custom_ocr, ocrTimeout = params.timeout;
return [4 /*yield*/, extractRawText(documentURL, ocrLibrary, customOCR, ocrTimeout)];
case 1:
ocrResponse = _a.sent();
rawText = lodash_1.default.get(ocrResponse, "raw_text", []);
isValidText = validateDocumentText(rawText);
if (!isValidText) {
return [2 /*return*/, constants_1.default.EMPTY_RESPONSE];
}
return [4 /*yield*/, parseDocumentDetails(documentType, rawText, customParser)];
case 2:
documentDetails = _a.sent();
return [2 /*return*/, {
raw_text: rawText,
is_document_valid: lodash_1.default.get(documentDetails, "is_document_valid"),
document_details: lodash_1.default.get(documentDetails, "document_details")
}];
}
});
}); };
// ******************************************************* //
// Logic for API handlers ends here //
// ******************************************************* //
exports.default = SmartDocuments;
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