custom-cards#86 Allow dotted object notation for the data option

This only works for attributes.

flex-table-card.js

@@ -1,7 +1,7 @@
 "use strict";
 
 // VERSION info
-var VERSION = "0.7.1";
+var VERSION = "0.7.3";
 
 // typical [[1,2,3], [6,7,8]] to [[1, 6], [2, 7], [3, 8]] converter
 var transpose = m => m[0].map((x, i) => m.map(x => x[i]));
@@ -281,7 +281,28 @@ class DataRow {
  } else {
  // no matching data found, complain:
  //raw_content.push("[[ no match ]]");
- raw_content.push(null);
+
+ let pos = col_key.indexOf('.');
+ if (pos < 0)
+ {
+ raw_content.push(null);
+ }
+ else
+ {
+ // if the col_key field contains a dotted object (eg: day.monday)
+ // then traverse each object to ensure that it exists
+ // until the final object value is found.
+ // if at any point in the traversal, the object is not found
+ // then null will be used as the value.
+ let objs = col_key.split('.');
+ let value = this.entity.attributes;
+ if (value) {
+ for (let idx = 0; value && idx < objs.length; idx++) {
+ value = (objs[idx] in value) ? value[objs[idx]] : null;
+ }
+ }
+ raw_content.push(value);
+ }
  }
 
  // @todo: not really nice to clean `raw_content` up here, why