Update COVIDcast export integration

src/modes/exportdata/ExportData.svelte

@@ -55,7 +55,8 @@
     startDate = urlParams.has('start_day') ? new Date(urlParams.get('start_day')) : param.sparkLineTimeFrame.min;
     endDate = urlParams.has('end_day') ? new Date(urlParams.get('end_day')) : param.sparkLineTimeFrame.max;
 
-    // Also normalize the dates to the current timezone
+    // Normalize the datest to the current timezone by *subtracting* the timezone
+    // offset (to account for negative timezones), multiplied by 60000 (minutes -> ms)
     startDate = new Date(startDate.getTime() - startDate.getTimezoneOffset() * -60000);
     endDate = new Date(endDate.getTime() - endDate.getTimezoneOffset() * -60000);
   }
@@ -88,7 +89,12 @@
 
     // Populate region based on URL params... but let the user override this later
     if (urlParams.has('geo_value') && !geoURLSet) {
-      let infos = infosByLevel[geoType].filter((d) => d.propertyId == urlParams.get('geo_value'));
+      let geo_value = urlParams.get('geo_value');
+      // Allow for lowercase state names e.g. 'ca' -> 'CA'
+      if (geoType == 'state') {
+        geo_value = geo_value.toUpperCase();
+      }
+      let infos = infosByLevel[geoType].filter((d) => d.propertyId == geo_value);
       addRegion(infos[0]);
       geoURLSet = true;
     }

src/modes/indicator/Indicator.svelte

@@ -96,7 +96,7 @@
         <HistoryLineChart {sensor} {date} {region} {fetcher} />
       </div>
     </div>
-    <IndicatorAbout {sensor} />
+    <IndicatorAbout {sensor} {region} {date} />
     <div class="grid-3-11">
       <hr />
       <GeoTable {sensor} {region} {date} {fetcher} />

src/modes/indicator/IndicatorAbout.svelte

@@ -1,18 +1,44 @@
 <script>
   import { modeByID } from '..';
+  import { formatDateISO } from '../../formats';
   import { currentMode } from '../../stores';
   import AboutSection from '../../components/AboutSection.svelte';
 
   /**
-   * @type {import('../../stores/params').SensorParam}
+   * @type {import("../stores/params").DateParam}
+   */
+  export let date;
+  /**
+   * @type {import("../stores/params").RegionParam}
+   */
+  export let region;
+  /**
+   * @type {import("../stores/params").SensorParam}
    */
   export let sensor;
 
-  function exportData() {
-    sensor.set(sensor.value);
+  function setExportMode() {
     // switch to export mode
     currentMode.set(modeByID.export);
   }
+
+  let exportURL = '';
+  $: {
+    exportURL = '';
+    if (sensor && sensor.key.split('-').length >= 2) {
+      // Given a sensor key formatted "sensor-name-here-signal_name_here", split on the last dash
+      let [last, ...rest] = sensor.key.split('-').reverse();
+      rest = rest.reverse().join('-');
+      exportURL += `data_source=${rest}&signal=${last}`;
+
+      if (region) {
+        exportURL += `&geo_type=${region.level}&geo_value=${region.propertyId}`;
+      }
+      if (date) {
+        exportURL += `&start_day=${formatDateISO(date.value)}&end_day=${formatDateISO(date.value)}`;
+      }
+    }
+  }
 </script>
 
 {#if sensor.value.description}
@@ -33,9 +59,7 @@
             </li>
           {/each}
           <li>
-            <a href={`../${modeByID.export.id}?sensor=${sensor.key}`} on:click|preventDefault={exportData}
-              >Export Data</a
-            >
+            <a href={`../export/?${exportURL}`} on:click={setExportMode}>Export Data</a>
           </li>
         </ul>
       {/if}