D-Net

import { Injectable } from "@angular/core";

import { JsonldDocument, Identifier, Person, License, Citation } from "../model/jsonld-document";

import * as _ from "lodash";

@Injectable()

export class OpenAireJsonldConverterService {

	constructor() { }

	convertPublication(result: any, URL): JsonldDocument {

		const doc = new JsonldDocument();

		doc.title = this.getTitle(result);

		doc.description = this.getDescription(result);

		doc.identifier = this.getIdentifier(result);

		doc.url = URL;

		doc.sameAs = this.getSameAs(result);

		doc.creator = this.getCreator(result);

		doc.dateCreated = this.getDateCreated(result);

		doc.citation = this.getCitation(result);

		doc.license = this.getLicense(result);

		doc.keyword = this.getKeyword(result);

		return doc;

	}

	private getTitle(result: any): String[] {

		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.title.content", null);

		if (!item) return null;

		return [item as String];

	}

	private getDescription(result: any): String[] {

		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.description", null);

		if (!item) return null;

		return [item as String];

	}

	private getDateCreated(result: any): String[] {

		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.dateofacceptance", null);

		if (!item) return null;

		return [item as String];

	}

	private getLicense(result: any): License[] {

		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.bestaccessright", null);

		if (!item) return null;

		if (!_.has(item, "classid")) return null;

		if (!_.has(item, "classname")) return null;

		if (!_.has(item, "schemeid")) return null;

		return [{

			title: [_.get(item, "classname")],

			identifier: [{

				id: _.get(item, "classid"),

				schema: _.get(item, "schemeid")

			}]

		}];

	}

	private getIdentifier(result: any): Identifier[] {

		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.pid", null);

		if (!item) return null;

		const array = new Array<Identifier>();

		if (Array.isArray(item)) {

			const itemArray = item as Array<any>;

			for (var i = 0; i < itemArray.length; i += 1) {

				const val = this.getSingleIdentifier(itemArray[i]);

				if (val) array.push(val);

			}

		}

		else {

			const val = this.getSingleIdentifier(item);

			if (val) array.push(val);

		}

		if (array.length == 0) return null;

		return array;

	}

	private getSingleIdentifier(item: any): Identifier {

		if (!_.has(item, "classname")) return null;

		if (!_.has(item, "content")) return null;

		return {

			schema: _.get(item, "classname"),

			id: _.get(item, "content")

		};

	}

	private getSameAs(result: any): String[] {

		const instances = _.get(result, "result.metadata.oaf:entity.oaf:result.children.instance", null);

		if (!instances) return null;

		if (!Array.isArray(instances)) return null;

		const array = new Array<String>();

		const instanceArray = instances as Array<any>;

		for (var i = 0; i < instanceArray.length; i += 1) {

			const webresources = _.get(instanceArray[i], "webresource", null);

			if (!webresources) continue;

			if (Array.isArray(webresources)) {

				const webresourceArray = webresources as Array<any>;

				for (var q = 0; q < webresourceArray.length; q += 1) {

					const url = _.get(webresourceArray[q], "url", null);

					if (!url) continue;

					array.push(url as String);

				}

			}

			else {

				const url = _.get(webresources, "url", null);

				if (!url) continue;

				array.push(url as String);

			}

		}

		if (array.length == 0) return null;

		return array;

	}

	private getKeyword(result: any): String[] {

		const subjects = _.get(result, "result.metadata.oaf:entity.oaf:result.subject", null);

		if (!subjects) return null;

		if (!Array.isArray(subjects)) return null;

		const array = new Array<String>();

		const subjectArray = subjects as Array<any>;

		for (var i = 0; i < subjectArray.length; i += 1) {

			const classid = _.get(subjectArray[i], "classid", null);

			if (classid !== "keyword") continue;

			const sub = _.get(subjectArray[i], "content", null);

			if (!sub) return null;

			array.push(sub as String);

		}

		if (array.length == 0) return null;

		return array;

	}

	private getCreator(result: any): Person[] {

		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.creator", null);

		if (!item) return null;

		const array = new Array<Person>();

		if (Array.isArray(item)) {

			const itemArray = item as Array<any>;

			for (var i = 0; i < itemArray.length; i += 1) {

				const val = this.getSinglePerson(itemArray[i]);

				if (val) array.push(val);

			}

		}

		else {

			const val = this.getSinglePerson(item);

			if (val) array.push(val);

		}

		if (array.length == 0) return null;

		return array;

	}

	private getSinglePerson(item: any): Person {

		if (!_.has(item, "surname") && !_.has(item, "name") && !_.has(item, "content")) return null;

		return {

			familyName: _.get(item, "surname", null),

			givenName: _.get(item, "name", null),

			name: _.get(item, "content", null)

		};

	}

	private getCitation(result: any): Citation[] {

		const item = _.get(result, "result.metadata.oaf:entity.extraInfo.citations.citation", null);

		if (!item) return null;

		const array = new Array<Citation>();

		if (Array.isArray(item)) {

			const itemArray = item as Array<any>;

			for (var i = 0; i < itemArray.length; i += 1) {

				const val = this.getSingleCitation(itemArray[i]);

				if (val) array.push(val);

			}

		}

		else {

			const val = this.getSingleCitation(item);

			if (val) array.push(val);

		}

		if (array.length == 0) return null;

		return array;

	}

	private getSingleCitation(item: any): Citation {

		if (!_.has(item, "rawText")) return null;

		if (!_.has(item, "id")) return null;

		const array = new Array<Identifier>();

		const ids = _.get(item, "id", null);

		if (Array.isArray(ids)) {

			const idsArray = ids as Array<any>;

			for (var i = 0; i < idsArray.length; i += 1) {

				const type = _.get(idsArray[i], "type", null);

				const value = _.get(idsArray[i], "value", null);

				if (!type || !value) continue;

				array.push({

					id: value,

					schema: type

				});

			}

		}

		else {

			const type = _.get(ids, "type", null);

			const value = _.get(ids, "value", null);

			if (type && value) {

				array.push({

					id: value,

					schema: type

				});

			}

		}

		if (array.length == 0) return null;

		return {

			title: [_.get(item, "rawText")],

			identifier: array

		};

	}

}