Tweaks to the permalinking implementation

Using Date.getDateString() didn't quite work for me: the dates returned
by the date picker never seemed to show up in the mapping. So use the
simpler YYYY-MM-DD date format and manually format the dates. The result
has been reliable for me.

Another tweak is to store the currentVersion, and once the commits are
loaded, identify the date for this version and update the header to
display a date (more user-friendly than a SHA).

Signed-off-by: Stephen Brennan <[email protected]>

index.html

@@ -83,9 +83,9 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
       var selectedConfigs = new Set();
 
       var versionDateMapping = new Map();
+      var currentVersion = "";
 
       function navigateToVersionFromDate(date) {
-        date = new Date(date).toDateString();
         version = versionDateMapping.get(date);
         if(!version) {
           return // if no version present, do not navigate
@@ -97,16 +97,30 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
         window.location.href = url;
       }
 
+      function dateString(date) {
+        const yearStr = date.getUTCFullYear().toString().padStart(4, "0");
+        const monthStr = (date.getUTCMonth() + 1).toString().padStart(2, "0");
+        const dayStr = date.getUTCDate().toString().padStart(2, "0");
+        return `${yearStr}-${monthStr}-${dayStr}`;
+      }
+
       function populateVersionOptions(data) {
         data = JSON.parse(data)
         let resp = Array.from(data);
+        let dates = new Set();
         resp.forEach((res)=>{
-          versionDateMapping.set(new Date(res.commit.committer.date).toDateString(), res.sha)
+          let date = new Date(res.commit.committer.date);
+          dates.add(date);
+          versionDateMapping.set(dateString(date), res.sha)
+          // If we started with a SHA, replace it with the date string
+          // for a better user experience.
+          if (currentVersion == res.sha)
+            setHeading(currentVersion, dateString(date));
         })
         let datepicker = document.getElementById("versionDateTimePicker")
         new tempusDominus.TempusDominus(datepicker, {
           restrictions: {
-            enabledDates: Array.from(versionDateMapping.keys().map(ds => new Date(ds))),
+            enabledDates: Array.from(dates),
           },
           display: {
               viewMode: 'calendar',
@@ -119,7 +133,7 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
               },
             },
             localization: {
-              format: 'MM-dd-yyyy',
+              format: 'yyyy-MM-dd',
             },
           useCurrent: false,
         })
@@ -131,9 +145,16 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
         return `https://raw.githubusercontent.com/oracle/kconfigs/${version}/docs/summary.json`
       }
 
+      function setHeading(version, date) {
+        let sp = document.getElementById("heading")
+        if (date)
+            sp.innerHTML = `Distribution Kernel Configs (date: ${date})`
+        else
+            sp.innerHTML = `Distribution Kernel Configs (version: ${version})`
+      }
+
       function updateVersion(invalid=false) {
         let params = new URLSearchParams(document.location.search);
-        let sp = document.getElementById("heading")
         if(invalid) {
           sp.innerHTML = `Distribution Kernel Configs`
           alert("Invalid Version. Please add a valid version")
@@ -142,9 +163,13 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
           window.location.href = url;
           return
         }
-        var version = params.get("version");
-        if(!version) return "gh-pages";
-        sp.innerHTML = `Distribution Kernel Configs (version: ${version})`
+        let version = params.get("version");
+        let date = "";
+        if(!version) {
+          version = "gh-pages";
+          date = "latest";
+        }
+        setHeading(version, date);
         return version
       }
 
@@ -268,7 +293,7 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
       }
       window.onpopstate = setState;
       setState();
-      let version = updateVersion();
+      currentVersion = updateVersion();
 
       let vor = new XMLHttpRequest()
       vor.open("GET", "https://api.github.com/repos/oracle/kconfigs/commits?sha=gh-pages", true)
@@ -279,7 +304,7 @@ <h5 class="modal-title" id="versionModalLabel">Select Date of Snapshot</h5>
       vor.send(null)
 
       const xhr = new XMLHttpRequest();
-      xhr.open("GET", getSummaryURL(version), true);
+      xhr.open("GET", getSummaryURL(currentVersion), true);
       xhr.onload = (event) => {
           console.log("Loaded kernel config summary")
           if(event.target.status === 200)