utils.js

/*eslint no-process-env: 0*/
import 'core-js/features/url-search-params';
import React from 'react';
import ReactGA from 'react-ga';
import alertifyjs from 'alertifyjs';
import moment from 'moment';
import {
  filter, difference, compact, find, reject, intersectionBy, size, keys, omitBy, isEmpty,
  get, includes, map, isArray, values, pick, sortBy, zipObject, orderBy, isObject, merge,
  uniqBy, cloneDeep, isEqual, without, capitalize, last, nth, startCase
} from 'lodash';
import {
  DATE_FORMAT, DATETIME_FORMAT, OCL_SERVERS_GROUP, OCL_FHIR_SERVERS_GROUP, HAPI_FHIR_SERVERS_GROUP,
  OPENMRS_URL, DEFAULT_FHIR_SERVER_FOR_LOCAL_ID,
} from './constants';
import APIService from '../services/APIService';
import { SERVER_CONFIGS } from './serverConfigs';

export const currentPath = () => window.location.hash.split('?')[0];

export const isAtGlobalSearch = () => window.location.hash.includes('#/search') || isAtRoot();

export const isAtRoot = () => currentPath() === '#/';

export const formatDate = date => moment(date).format(DATE_FORMAT);

export const formatDateTime = date => moment(date).format(DATETIME_FORMAT);

export const formatWebsiteLink = (value, style, text) => {
  if(value && value.trim()) {
    let href = value.trim();
    if(!href.startsWith('http://') && !href.startsWith('https://'))
      href = 'https://' + href;

    return (
      <a
        target='_blank'
        rel="noopener noreferrer"
        href={href}
        className="ellipsis-text"
        style={merge({maxWidth: '100px'}, (style || {}))}>
        {text || value.trim()}
      </a>
    );
  }
  return '';
}

export const getIndirectMappings = (mappings, concept_url) => filter(mappings, {to_concept_url: concept_url});

export const getDirectMappings = (mappings, concept_url) => filter(mappings, {from_concept_url: concept_url});

export const getDirectExternalMappings = (mappings, concept_url) => filter(mappings, mapping => Boolean(mapping.from_concept_url === concept_url && mapping.external_id));

export const getLinkedQuestions = (mappings, concept_url) => filter(mappings, {to_concept_url: concept_url, map_type: 'Q-AND-A'});

export const getLinkedAnswers = (mappings, concept_url) => filter(mappings, {from_concept_url: concept_url, map_type: 'Q-AND-A'});

export const getSetParents = (mappings, concept_url) => filter(mappings, {to_concept_url: concept_url, map_type: 'CONCEPT-SET'});

export const getSetMembers = (mappings, concept_url) => filter(mappings, {from_concept_url: concept_url, map_type: 'CONCEPT-SET'});

export const getMappingsDistributionByMapType = (mappings, concept_url) => {
  const linkedQuestions = getLinkedQuestions(mappings, concept_url);
  const linkedAnswers = getLinkedAnswers(mappings, concept_url);
  const setParents = getSetParents(mappings, concept_url);
  const setMembers = getSetMembers(mappings, concept_url);
  const directExternalMappings = getDirectExternalMappings(
    difference(mappings, [...linkedAnswers, ...linkedQuestions, ...setParents, ...setMembers]),
    concept_url
  );
  const directInternalMappings = getDirectMappings(
    difference(mappings, [...linkedAnswers, ...linkedQuestions, ...setParents, ...setMembers, ...directExternalMappings]),
    concept_url
  );
  const indirectMappings = getIndirectMappings(
    difference(mappings, [...linkedAnswers, ...linkedQuestions, ...setParents, ...setMembers, ...directExternalMappings, ...directInternalMappings]),
    concept_url
  );

  return {
    'Linked Question': linkedQuestions,
    'Linked Answers': linkedAnswers,
    'Set Parent': setParents,
    'Set Members': setMembers,
    'Direct External Mapping': directExternalMappings,
    'Direct Internal Mapping': directInternalMappings,
    'Inverse Mapping': indirectMappings,
  }
}

export const getAPIURL = () => {
  const savedConfigs = getSelectedServerConfig();
  /*eslint no-undef: 0*/
  return get(savedConfigs, 'url') || window.API_URL || process.env.API_URL;
}

export const toFullURL = uri => window.location.origin + '/#' + uri;

export const toFullAPIURL = uri => getAPIURL() + uri;

export const toRelativeURL = url => url.replace(getAPIURL(), '');

export const copyURL = url => {
  copyToClipboard(url, 'Copied URL to clipboard!');
}

export const copyToClipboard = (copyText, message) => {
  if(copyText)
    navigator.clipboard.writeText(copyText);

  if(message)
    alertifyjs.success(message);
}

export const toParentURI = uri => uri.split('/').splice(0, 5).join('/') + '/';

export const toOwnerURI = uri => uri.split('/').splice(0, 3).join('/') + '/';

export const headFirst = versions => compact([find(versions, {version: 'HEAD'}), ...reject(versions, {version: 'HEAD'})]);

export const currentUserToken = () => localStorage.token;

export const isLoggedIn = () => Boolean(currentUserToken());

export const getCurrentUser = () => {
  const data = localStorage.user;
  if(data)
    return JSON.parse(data);

  return null;
};

export const getCurrentUserOrgs = () => get(getCurrentUser(), 'subscribed_orgs');

export const getCurrentUserUsername = () => get(getCurrentUser(), 'username');

export const nonEmptyCount = (object, attributes) => size(intersectionBy(keys(omitBy(object, val => (isEmpty(val) || includes(['none', 'None'], val)))), attributes));

export const isCurrentUserMemberOf = orgId => Boolean(orgId && includes(map(getCurrentUserOrgs(), 'id'), orgId));

export const defaultCreatePin = (resourceType, resourceId, service, callback) => {
  if(service) {
    service.post({resource_type: resourceType, resource_id: resourceId}).then(response => {
      if(get(response, 'error')) {
        let error;
        if(isArray(response.error) && !isEmpty(compact(response.error)))
          error = compact(response.error)[0];
        else
          error = get(values(response.error), '0') || 'Something bad happened.';
        alertifyjs.error(error);
      } else if(callback && get(response, 'status') === 201)
        callback(response.data);
    });
  }
}

export const defaultDeletePin = (service, callback) => {
  if(service) {
    service.delete().then(response => {
      if(callback && get(response, 'status') === 204)
        callback();
    });
  }
}

export const isAdminUser = () => {
  const currentUser = getCurrentUser();
  return get(currentUser, 'is_staff') || get(currentUser, 'is_superuser');
}

export const isSuperuser = () => get(getCurrentUser(), 'is_superuser');

export const toObjectArray = obj => isEmpty(obj) ? [] : map(keys(obj), k => pick(obj, k));

export const sortObjectBy = (obj, comparator) => {
  const _keys = sortBy(keys(obj), key => comparator ? comparator(obj[key], key) : key);
  return zipObject(_keys, map(_keys, key => obj[key]));
}

export const arrayToObject = arr => {
  if(isEmpty(arr))
    return {};

  return arr.reduce((prev, curr) => {
    if(curr.key)
      prev[curr.key] = curr.value;
    return prev;
  }, {});
}

export const currentUserHasAccess = () => {
  if(!isLoggedIn())
    return false;
  if(isAdminUser())
    return true;

  const url = window.location.hash.replace('#/', '');
  if(!url)
    return false;

  const url_parts = compact(url.split('/'));

  const ownerType = url_parts[0];
  const owner = url_parts[1];
  if(!owner || !ownerType)
    return false;

  const currentUser = getCurrentUser();
  if(ownerType === 'users')
    return currentUser?.username === owner;
  if(ownerType === 'orgs')
    return isSubscribedTo(owner);

  return false;
}

export const isSubscribedTo = org => Boolean(org && includes(map(get(getCurrentUser(), 'subscribed_orgs'), 'id'), org));

export const getCurrentURL = () => window.location.href.replace(new RegExp('/$'), '');

const handleLookupValuesResponse = (data, callback, attr) => {
  const _attr = attr || 'id';
  callback(orderBy(uniqBy(map(data, cc => ({id: get(cc, _attr), name: get(cc, _attr)})), 'name')), 'name');
}

export const fetchLocales = (callback, includeRawName=false) => {
  APIService.locales().get(null, null, {verbose: true}).then(response => {
    const mapper = locale => {
      let data = {id: locale.id, name: locale.display_name, uuid: locale.uuid, locale: locale.locale}
      if(includeRawName) {
        data.name = locale.display_name
        data.displayName = locale.display_name
      }
      return data
    }
    callback(orderBy(map(response.data, mapper), 'displayName'));
  });
}

export const fetchConceptClasses = callback => {
  APIService.orgs('OCL').sources('Classes').appendToUrl('concepts/lookup/')
    .get()
    .then(response => handleLookupValuesResponse(response.data, callback));
}

export const fetchMapTypes = callback => {
  APIService.orgs('OCL').sources('MapTypes').appendToUrl('concepts/lookup/')
    .get()
    .then(response => handleLookupValuesResponse(response.data, callback));
}

export const fetchDatatypes = callback => {
  APIService.orgs('OCL').sources('Datatypes').appendToUrl('concepts/lookup/')
    .get()
    .then(response => handleLookupValuesResponse(response.data, callback));
}

export const fetchNameTypes = callback => {
  APIService.orgs('OCL').sources('NameTypes').appendToUrl('concepts/lookup/')
    .get()
    .then(response => handleLookupValuesResponse(response.data, callback));
}

export const fetchDescriptionTypes = callback => {
  APIService.orgs('OCL').sources('DescriptionTypes').appendToUrl('concepts/lookup/')
    .get()
    .then(response => handleLookupValuesResponse(response.data, callback));
}

export const downloadObject = (obj, format, filename) => {
  const data = new Blob([obj], {type: format});
  downloadFromURL(window.URL.createObjectURL(data), filename);
}

export const downloadFromURL = (url, filename) => {
  const tempLink = document.createElement('a');
  tempLink.href = url;
  tempLink.setAttribute('download', filename);
  tempLink.click();
}

export const arrayToCSV = objArray => {
  const array = typeof objArray !== 'object' ? JSON.parse(objArray) : objArray;
  let str = `${Object.keys(array[0]).map(value => `"${value}"`).join(",")}` + '\r\n';

  return array.reduce((str, next) => {
    str += `${Object.values(next).map(value => isObject(value) ? `"${JSON.stringify(value)}"` : `"${value}"`).join(",")}` + '\r\n';
    return str;
  }, str);
}

export const refreshCurrentUserCache = callback => {
  APIService.user().get(null, null, {includeSubscribedOrgs: true, includeAuthGroups: true}).then(response => {
    if(response.status === 200) {
      localStorage.setItem('user', JSON.stringify(response.data));
      if(callback) callback(response);
    }
  });
}

export const replaceCurrentUserCacheWith = data => localStorage.setItem('user', JSON.stringify(data));

export const formatByteSize = bytes => {
  if(bytes < 1024) return bytes + " bytes";
  else if(bytes < 1048576) return(bytes / 1024).toFixed(3) + " KB";
  else if(bytes < 1073741824) return(bytes / 1048576).toFixed(3) + " MB";
  else return(bytes / 1073741824).toFixed(3) + " GB";
};


export const memorySizeOf = (obj, format=true) => {
  var bytes = 0;

  const sizeOf = obj => {
    if(obj !== null && obj !== undefined) {
      switch(typeof obj) {
        case 'number':
          bytes += 8;
          break;
        case 'string':
          bytes += obj.length * 2;
          break;
        case 'boolean':
          bytes += 4;
          break;
        case 'object':
          var objClass = Object.prototype.toString.call(obj).slice(8, -1);
          if(objClass === 'Object' || objClass === 'Array') {
            for(var key in obj) {
              if(!obj.hasOwnProperty(key)) continue;
              sizeOf(obj[key]);
            }
          } else bytes += obj.toString().length * 2;
          break;
      }
    }
    return bytes;
  };


  const byteSize = sizeOf(obj);

  if(format)
    return formatByteSize(byteSize);

  return byteSize;
};

export const getCurrentUserCollections = callback => {
  const username = getCurrentUserUsername();
  if(username) {
    APIService.users(username)
              .collections()
              .get(null, null, {limit: 1000})
              .then(response => isArray(response.data) ? callback(response.data) : false);
    APIService.users(username)
              .orgs()
              .appendToUrl('collections/')
              .get(null, null, {limit: 1000})
              .then(response => isArray(response.data) ? callback(response.data) : false);
  }
}

export const isValidPassword = (password, strength, minStrength = 3) => {
  return Boolean(
    password &&
    strength >= minStrength &&
    password.length >= 8 &&
    password.match(new RegExp(/(?=.*[0-9])(?=.*[a-zA-Z])(?=\S+$)./g))
  );
}

export const getUserInitials = user => {
  user = user || getCurrentUser();
  if(!user)
    return '';

  let result = '';
  const first_name = get(user, 'first_name', '').trim();
  const last_name = get(user, 'last_name', '').trim();
  const username = user.username;
  const hasValidFirstName = first_name && first_name !== '-';
  const hasValidLastName = last_name && last_name !== '-';
  if(!hasValidFirstName && !hasValidLastName && username)
    result = username.slice(0, 2);
  if(hasValidFirstName)
    result = first_name[0];
  if(hasValidLastName)
    result += last_name[0];
  if(result.length == 1 && hasValidFirstName)
    result += first_name[1];

  return result.toUpperCase();
}

export const jsonifySafe = data => {
  if(!data)
    return data;

  try {
    return JSON.parse(data);
  } catch (err) {
    return data;
  }
}

export const getSelectedServerConfig = () => {
  const serverConfig = localStorage.getItem('server');
  if(serverConfig)
    return JSON.parse(serverConfig);
}

export const getAppliedServerConfig = () => {
  const selectedConfig = getSelectedServerConfig();

  if(selectedConfig)
    return selectedConfig;

  const APIURL = window.API_URL || process.env.API_URL;
  return find(SERVER_CONFIGS, {url: APIURL});
}

export const isServerSwitched = () => {
  const selectedServer = getSelectedServerConfig()
  return selectedServer && selectedServer.id !== getDefaultServerConfig()?.id;
};

export const getDefaultServerConfig = () => {
  const APIURL = window.API_URL || process.env.API_URL;
  return find(SERVER_CONFIGS, {url: APIURL});
}

export const getLocalFHIRServerConfig = () => find(SERVER_CONFIGS, {type: 'fhir', local: true});
export const getDefaultFHIRServerConfig = () => find(SERVER_CONFIGS, {id: DEFAULT_FHIR_SERVER_FOR_LOCAL_ID});

export const getFHIRServerConfigFromCurrentContext = () => {
  const server = getAppliedServerConfig();
  if(server.type === 'fhir')
    return server;
  if(server.fhirServerId)
    return find(SERVER_CONFIGS, {type: 'fhir', id: server.fhirServerId});
  if(server.local)
    return getLocalFHIRServerConfig() || getDefaultFHIRServerConfig();
}

export const canSwitchServer = () => {
  const user = getCurrentUser();

  return Boolean(
    getSelectedServerConfig() ||
    get(user, 'is_superuser') ||
    !isEmpty(get(user, 'auth_groups'))
  );
}

export const isFHIRServer = () => get(getAppliedServerConfig(), 'type') === 'fhir';

export const isConcept = uri => Boolean(uri.match('/concepts/'));
export const isMapping = uri => Boolean(uri.match('/mappings/'));


// https://stackoverflow.com/questions/10420352/converting-file-size-in-bytes-to-human-readable-string
/**
 * Format bytes as human-readable text.
 *
 * @param bytes Number of bytes.
 * @param si True to use metric (SI) units, aka powers of 1000. False to use
 *           binary (IEC), aka powers of 1024.
 * @param dp Number of decimal places to display.
 *
 * @return Formatted string.
 */
export const humanFileSize = (bytes, si=false, dp=1) => {
  const thresh = si ? 1000 : 1024;

  if (Math.abs(bytes) < thresh) {
    return bytes + ' B';
  }

  const units = si
              ? ['KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
              : ['KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'];
  let u = -1;
  const r = 10**dp;

  do {
    bytes /= thresh;
    ++u;
  } while (Math.round(Math.abs(bytes) * r) / r >= thresh && u < units.length - 1);


  return bytes.toFixed(dp) + ' ' + units[u];
}

export const getServerConfigsForCurrentUser = () => {
  if(isAdminUser())
    return SERVER_CONFIGS;

  const defaultConfig = getDefaultServerConfig();
  const appliedConfig = getAppliedServerConfig();

  let eligible = [];
  if(isLoggedIn()) {
    const { auth_groups } = getCurrentUser();
    if(includes(auth_groups, OCL_SERVERS_GROUP))
      eligible = [...eligible, ...filter(SERVER_CONFIGS, {type: 'ocl'})];
    if(includes(auth_groups, OCL_FHIR_SERVERS_GROUP))
      eligible = [...eligible, ...filter(SERVER_CONFIGS, {type: 'fhir', hapi: false})];
    if(includes(auth_groups, HAPI_FHIR_SERVERS_GROUP))
      eligible = [...eligible, ...filter(SERVER_CONFIGS, {type: 'fhir', hapi: true})];
  } else {
    eligible = JSON.parse(localStorage.getItem('server_configs')) || [];
  }

  eligible = compact([defaultConfig, appliedConfig, ...eligible]);
  return uniqBy(eligible, 'id');
}

export const arrayToSentence = (arr, separator, lastSeparator=' and ') => {
  if(arr.length <= 2)
    return arr.join(lastSeparator);

  const newArr = cloneDeep(arr);
  newArr.push( `${lastSeparator}${newArr.pop()}`);
  return newArr.join(separator);
}

export const generateRandomString = () => Math.random().toString(36).substring(7);

export const getEnv = forURL => {
  const fqdn = window.location.origin;

  if(fqdn.match('app.staging.openconceptlab'))
    return 'staging';
  if(fqdn.match('app.qa.openconceptlab'))
    return 'qa';
  if(fqdn.match('app.demo.openconceptlab'))
    return 'demo';
  if(fqdn.match('app.dev.openconceptlab'))
    return 'dev';
  if(fqdn.match('app.staging.who.openconceptlab'))
    return forURL ? 'staging.who' : 'staging-who';
  if(fqdn.match('app.openconceptlab'))
    return forURL ? '' : 'production';

  return 'development';
}

export const getOpenMRSURL = () => {
  let env = getEnv(true);

  if(env === 'development')
    env = 'qa';

  if(env) env += '.';

  return OPENMRS_URL.replace('openmrs.', `openmrs.${env}`);
}

export const recordGAPageView = () => {
  /*eslint no-undef: 0*/
  ReactGA.initialize(window.GA_ACCOUNT_ID || process.env.GA_ACCOUNT_ID);
  ReactGA.pageview(window.location.pathname + window.location.hash);
}

export const recordGAAction = (category, action, label) => {
  /*eslint no-undef: 0*/
  if(category && action) {
    ReactGA.initialize(window.GA_ACCOUNT_ID || process.env.GA_ACCOUNT_ID);
    ReactGA.event({category: category, action: action, label: label || action});
  }
}

export const recordGAUpsertEvent = (category, edit, resource) => {
  const actionPrefix = edit ? 'update' : 'create'
  resource = resource || category.replaceAll(' ', '_').toLowerCase()
  let action = `${actionPrefix}_${resource}`
  let label = `${startCase(actionPrefix)} ${startCase(resource)}`
  recordGAAction(category, action, label)
}

export const setUpRecentHistory = history => {
  history.listen(location => {
    recordGAPageView()
    let visits = JSON.parse(get(localStorage, 'visits', '[]'));
    let urlParts = compact(location.pathname.split('/'));
    let type = '';
    let category = '';
    let format = false;
    if(location.pathname.match('/login') || location.pathname === '/')
      return;
    if(location.pathname.match('/imports')) {
      type = category = 'import';
      format = true;
    } else if(location.pathname.match('/search/')) {
      category = 'search';
      const queryParams = new URLSearchParams(location.search);
      type = queryParams.get('type');
      format = true;
    } else if(location.pathname.match('/compare')) {
      category = 'compare';
      type = 'concepts';
      format = true;
    } else {
      if(urlParts.length <= 3) {
        type = category = urlParts[0];
        urlParts = without(urlParts, 'orgs', 'users');
      }
      if(urlParts.length == 4) {
        type = category = urlParts[2];
        urlParts = without(urlParts, 'orgs', 'users', 'sources', 'collections');
      }
      if(urlParts.length == 5) {
        if(includes(['mappings', 'concepts', 'versions', 'references'], last(urlParts))) {
          type = category = last(urlParts);
        }
        urlParts = without(urlParts, 'orgs', 'users', 'sources', 'collections');
      }
      if(urlParts.length >= 6) {
        if(location.pathname.match('/concepts/')) {
          type = category = 'concept';
        }
        if(location.pathname.match('/mappings/')) {
          type = category = 'mapping';
        }
        if(location.pathname.match('/references')) {
          type = category = 'reference';
        }
        if(location.pathname.match('/expansions')) {
          type = category = 'expansion';
        }
        urlParts = without(urlParts, 'orgs', 'users', 'sources', 'collections');
      }
    }
    if(!includes(['concepts', 'mappings'], last(urlParts)))
      urlParts = without(urlParts, 'concepts', 'mappings');
    let name = format ? map(urlParts, capitalize).join(' / ') : urlParts.join(' / ');
    if(category !== type && type)
      name += ' / ' + type;
    const lastVisit =  visits[0];
    if(isEqual(get(lastVisit, 'name'), name))
      visits.shift();
    visits.push({name: name, location: location, type: type || '', category: category || '', at: new Date().getTime()});
    visits = orderBy(visits, 'at', 'desc').slice(0, 10);
    localStorage.setItem('visits', JSON.stringify(visits));
  });
}

export const getSiteTitle = () => get(getAppliedServerConfig(), 'info.site.title', 'OCL');

export const getRandomColor = () => `#${Math.floor(Math.random()*16777215).toString(16)}`;

export const logoutUser = (alert = true, redirectToLogin) => {
  const clearTokens = () => {
    localStorage.removeItem('token');
    localStorage.removeItem('id_token');
    localStorage.removeItem('user');
    localStorage.removeItem('visits');
  }
  const callback = () => {
    clearTokens()
    if(alert)
      alertifyjs.success('You have signed out.');

    if(redirectToLogin)
      window.location.hash = '#/accounts/login';
    else {
      window.location.hash = '#/';
      window.location.reload();
    }
  }
  const logoutURL = getSSOLogoutURL()
  if(logoutURL) {
    clearTokens()
    window.location = logoutURL
  }
  else
    callback()
}

export const paramsToParentURI = (params, versioned=false) => {
  let uri = '';
  if(params.org)
    uri += `/orgs/${params.org}`;
  else if (params.user)
    uri += `/users/${params.user}`;
  if(params.source)
    uri += `/sources/${params.source}`;
  else if(params.collection)
    uri += `/collections/${params.collection}`;
  if(params.version && !versioned)
    uri += `/${params.version}`;

  return uri + '/';
}

export const paramsToURI = (params, versioned=false, expansion=false) => {
  let uri = '';
  if(params.org)
    uri += `/orgs/${params.org}`;
  else if (params.user)
    uri += `/users/${params.user}`;
  if(params.source)
    uri += `/sources/${params.source}`;
  else if(params.collection)
    uri += `/collections/${params.collection}`;
  if(params.version && !versioned)
    uri += `/${params.version}`;
  if(params.expansion && !expansion)
    uri += `/expansions/${params.expansion}`;
  if(params.concept)
    uri += `/concepts/${params.concept}`;
  else if(params.mapping)
    uri += `/mappings/${params.mapping}`;
  if(params.conceptVersion && !versioned)
    uri += `/${params.conceptVersion}`;
  if(params.mappingVersion && !versioned)
    uri += `/${params.mappingVersion}`;

  return uri + '/';
}

export const getWidthOfText = (txt, fontname, fontsize) => {
  if(getWidthOfText.c === undefined){
    getWidthOfText.c=document.createElement('canvas');
    getWidthOfText.ctx=getWidthOfText.c.getContext('2d');
  }
  var fontspec = fontsize + ' ' + fontname;
  if(getWidthOfText.ctx.font !== fontspec)
    getWidthOfText.ctx.font = fontspec;
  return getWidthOfText.ctx.measureText(txt).width + 60;
}

export const getParamsFromObject = item => {
  let params = {};
  if(item.owner_type === 'Organization')
    params.org = item.owner;
  else if(item.owner_type === 'User')
    params.user = item.owner;
  if(item.source)
    params.source = item.source;
  if(item.map_type)
    params.mapping = item.id;
  else if (item.concept_class)
    params.concept = item.id;

  return params;
}

export const dropVersion = uri => {
  if(!uri)
    return uri

  const parts = uri.split('/')

  if (parts.length <= 4)
    return uri

  const resource = nth(parts, -4)
  const name = nth(parts, -3)
  const version = nth(parts, -2)
  if (['concepts', 'mappings', 'sources', 'collections'].includes(resource) && name && version)
    return parts.splice(0, parts.indexOf(nth(parts, -2))).join('/') + '/'

  return uri

}

// Internet Explorer 6-11
export const isIE = () => /*@cc_on!@*/false || !!document.documentMode;

// Chrome 1 - 71
export const isChrome = () => !!window.chrome && (!!window.chrome.webstore || !!window.chrome.runtime);

// Opera 8.0+
export const isOpera = () => (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;

export const isDeprecatedBrowser = () => isIE() || isOpera();

export const isSSOEnabled = () => {
  const redirectURL = window.LOGIN_REDIRECT_URL || process.env.LOGIN_REDIRECT_URL
  const oidClientID = window.OIDC_RP_CLIENT_ID || process.env.OIDC_RP_CLIENT_ID
  const oidClientSecret = window.OIDC_RP_CLIENT_SECRET || process.env.OIDC_RP_CLIENT_SECRET

  return Boolean(redirectURL && oidClientID && oidClientSecret)
}

export const getLoginURL = returnTo => {
  const redirectURL = window.LOGIN_REDIRECT_URL || process.env.LOGIN_REDIRECT_URL
  const oidClientID = window.OIDC_RP_CLIENT_ID || process.env.OIDC_RP_CLIENT_ID
  if(isSSOEnabled())
    return `${getAPIURL()}/users/login/?client_id=${oidClientID}&state=fj8o3n7bdy1op5&nonce=13sfaed52le09&redirect_uri=${redirectURL}`
  let url = '/#/accounts/login'
  if(returnTo)
    url += `?returnTo=${returnTo}`
  return url
}

export const getSSOLogoutURL = () => {
  const redirectURL = window.LOGIN_REDIRECT_URL || process.env.LOGIN_REDIRECT_URL
  const idToken = localStorage.id_token
  if(redirectURL && idToken)
    return `${getAPIURL()}/users/logout/?&post_logout_redirect_uri=${redirectURL}&id_token_hint=${idToken}`
}


export const urlSearchParamsToObject = urlSearchParams => {
  const result = {}
  for(const [key, value] of urlSearchParams.entries()) { // each 'entry' is a [key, value] tuple
    result[key] = value;
  }
  return result;
}