perfectkb-yate/src/autocompleters/utils.js

Yet Another Turtle Editor, forked from YASQE

"use strict";
var $ = require("jquery"), utils = require("./utils.js"), yutils = require("yasgui-utils");
/**
 * Where the base class only contains functionality related to -all- completions, this class contains some utils used here and there in our autocompletions
 */

/**
 * Converts rdf:type to http://.../type and converts <http://...> to http://...
 * Stores additional info such as the used namespace and prefix in the token object
 */
var preprocessResourceTokenForCompletion = function(yate, token) {
  var docPrefixes = yate.getPrefixesFromDocument();
  if (!token.string.indexOf("<") == 0) {
    token.tokenPrefix = token.string.substring(0, token.string.indexOf(":") + 1);

    if (docPrefixes[token.tokenPrefix.slice(0, -1)] != null) {
      token.tokenPrefixUri = docPrefixes[token.tokenPrefix.slice(0, -1)];
    }
  }

  token.autocompletionString = token.string.trim();
  if (!token.string.indexOf("<") == 0 && token.string.indexOf(":") > -1) {
    // hmm, the token is prefixed. We still need the complete uri for autocompletions. generate this!
    for (var prefix in docPrefixes) {
      if (token.tokenPrefix === prefix + ":") {
        token.autocompletionString = docPrefixes[prefix];
        token.autocompletionString += token.string.substring(prefix.length + 1);
        break;
      }
    }
  }

  if (token.autocompletionString.indexOf("<") == 0)
    token.autocompletionString = token.autocompletionString.substring(1);
  if (token.autocompletionString.indexOf(">", token.length - 1) !== -1)
    token.autocompletionString = token.autocompletionString.substring(0, token.autocompletionString.length - 1);
  return token;
};

var postprocessResourceTokenForCompletion = function(yate, token, suggestedString) {
  if (token.tokenPrefix && token.autocompletionString && token.tokenPrefixUri) {
    // we need to get the suggested string back to prefixed form
    suggestedString = token.tokenPrefix + suggestedString.substring(token.tokenPrefixUri.length);
  } else {
    // it is a regular uri. add '<' and '>' to string
    suggestedString = "<" + suggestedString + ">";
  }
  return suggestedString;
};

//Use protocol relative request when served via http[s]*. Otherwise (e.g. file://, fetch via http)
var reqProtocol = window.location.protocol.indexOf("http") === 0 ? "https://" : "http://";
var fetchFromLov = function(yate, completer, token, callback) {
  if (!token || !token.string || token.string.trim().length == 0) {
    yate.autocompleters.notifications.getEl(completer).empty().append("Nothing to autocomplete yet!");
    return false;
  }
  var maxResults = 50;

  var args = {
    q: token.autocompletionString,
    page: 1
  };
  if (completer.name == "classes") {
    args.type = "class";
  } else {
    args.type = "property";
  }
  var results = [];
  var url = "";
  var updateUrl = function() {
    url = reqProtocol + "lov.linkeddata.es/dataset/lov/api/v2/autocomplete/terms?" + $.param(args);
  };
  updateUrl();
  var increasePage = function() {
    args.page++;
    updateUrl();
  };
  var doRequests = function() {
    $.get(url, function(data) {
      for (var i = 0; i < data.results.length; i++) {
        if ($.isArray(data.results[i].uri) && data.results[i].uri.length > 0) {
          results.push(data.results[i].uri[0]);
        } else {
          results.push(data.results[i].uri);
        }
      }
      if (results.length < data.total_results && results.length < maxResults) {
        increasePage();
        doRequests();
      } else {
        //if notification bar is there, show feedback, or close
        if (results.length > 0) {
          yate.autocompleters.notifications.hide(yate, completer);
        } else {
          yate.autocompleters.notifications.getEl(completer).text("0 matches found...");
        }
        callback(results);
        // requests done! Don't call this function again
      }
    }).fail(function(jqXHR, textStatus, errorThrown) {
      yate.autocompleters.notifications.getEl(completer).empty().append("Failed fetching suggestions..");
    });
  };
  //if notification bar is there, show a loader
  yate.autocompleters.notifications
    .getEl(completer)
    .empty()
    .append($("<span>Fetchting autocompletions &nbsp;</span>"))
    .append($(yutils.svg.getElement(require("../imgs.js").loader)).addClass("notificationLoader"));
  doRequests();
};

module.exports = {
  fetchFromLov: fetchFromLov,
  preprocessResourceTokenForCompletion: preprocessResourceTokenForCompletion,
  postprocessResourceTokenForCompletion: postprocessResourceTokenForCompletion
};