# All files / blue-button/lib sense.js

88.09% Statements 148/168
90.9% Branches 40/44
100% Functions 2/2
88.09% Lines 148/168

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     //sense.js - Determining file content type e.g. CCDA or C32 or BB.json/JSON or text/other formats.

    "use strict";

    var xml = require("@amida-tech/blue-button-xml").xmlUtil;

    //Sense document type based on XML object
    var senseXml = function (doc) {
      //data must be an object
      if (!doc || typeof (doc) !== "object") {
        //TODO: throw a proper error here
        return null;
      }

      var c32Result = xml.xpath(doc, 'h:templateId[@root=\"2.16.840.1.113883.3.88.11.32.1\"]');
      if (c32Result && c32Result.length > 0) {
        return {
          type: "c32"
        };
      }

      var cdaResult = xml.xpath(doc, 'h:templateId[@root=\"2.16.840.1.113883.10.20.1\"]');
      var cdaTemplateResult = xml.xpath(doc, 'h:code[@code=\"34133-9\"][@codeSystem=\"2.16.840.1.113883.6.1\"]');
      if ((cdaResult && cdaResult.length > 0) && (cdaTemplateResult && cdaTemplateResult.length > 0)) {
        return {
          type: "cda"
        };
      }

      var ccdResult = xml.xpath(doc, 'h:templateId[@root=\"2.16.840.1.113883.10.20.22.1.1\"] | h:templateId[@root=\"2.16.840.1.113883.10.20.22.1.2\"]');
      if (ccdResult && ccdResult.length > 0) {
        return {
          type: "ccda"
        };
      }

      var ncpdpResult = xml.xpath(doc, '//Message/Body/*');
      if (ncpdpResult && ncpdpResult.length > 0) {
        try {
          require.resolve("blue-button-ncpdp"); // check if the module is present
          return {
            type: "ncpdp"
          };
        } catch (ex) {}
      }

      return {
        type: "xml"
      };
    };

    //Sense document type based on String
    var senseString = function (data) {
      //data must be a string

      if (!data || typeof (data) !== "string") {
        //TODO: throw a proper error here
        return null;
      }

      //console.log(data);
      var doc;
      var result;
      var version = "";
      var reg_exp_v;

      //TODO: better xml detection needed
      if (data.indexOf("<?xml") !== -1 || data.indexOf("<ClinicalDocument") !== -1) {
        //parse xml object...
        try {
          doc = xml.parse(data);
        } catch (ex) {
          return {
            type: "unknown",
            error: ex
          };
        }

        result = senseXml(doc);
        result.xml = doc;

        return result;

      } else if (data.trim().indexOf("<") === 0) {
        //sensing xml with no xml declaration
        //TODO: there should be a better way (like comparing first and last tags and see if they match)

        doc;
        try {
          doc = xml.parse(data);
        } catch (ex) {
          return {
            type: "unknown",
            error: ex
          };
        }

        result = senseXml(doc);
        result.xml = doc;

        return result;
      } else {
        //parse json or determine if text object...
        try {
          var json = JSON.parse(data); // {}

          if (json.data && json.meta) {
            return {
              type: "blue-button.js",
              json: json
            };

          } else {

            return {
              type: "json",
              json: json
            };
          }
        } catch (e) {
          //console.error("Parsing error:", e);

          if (data.indexOf("MYMEDICARE.GOV PERSONAL HEALTH INFORMATION") > 0 &&
            data.indexOf("Produced by the Blue Button") > 0) {
            version = "";

            reg_exp_v = /Produced by the Blue Button \(v(\d+\.\d+)\)/g;
            version = reg_exp_v.exec(data)[1];

            return {
              type: "cms",
              version: version
            };
          } else if (data.indexOf("MY HEALTHEVET PERSONAL INFORMATION REPORT") > 0) {
            version = "";

            reg_exp_v = /utton \(v(\d+.\d+|\d+)\)/g;
            version = reg_exp_v.exec(data)[1];

            return {
              type: "va",
              version: version
            };
          } else if (data.indexOf("%PDF") === 0) {
            return {
              type: "pdf"
            };
          } else if (data.indexOf("+\n  Disclaimer:") > 0) {
            return {
              type: "format-x"
            };
          }

          return {
            type: "unknown"
          };
        }
      }

      return {
        type: "unknown"
      };
    };

    module.exports = {
      senseXml: senseXml,
      senseString: senseString
    };