Fix two bugs. Column misname and case insensitivity

Signed-off-by: Martyn Ranyard <m@rtyn.berlin>

internal/webserver/webserver.go

@@ -1,10 +1,12 @@
 package webserver
 
 import (
+	"container/heap"
 	"errors"
 	"math/rand"
 	"regexp"
 	"sort"
+	"unicode"
 
 	irc "git.martyn.berlin/martyn/twitchsingstools/internal/irc"
 	"github.com/dustin/go-humanize"
@@ -249,6 +251,12 @@ func AdminHandler(response http.ResponseWriter, request *http.Request) {
 	} else {
 		fmt.Printf("Cache of %d performances is younger than an hour - %.1f hours old to be precise... not fetching.\n", len(ircBot.ChannelData[vars["channel"]].VideoCache), time.Now().Sub(ircBot.ChannelData[vars["channel"]].VideoCacheUpdated).Hours())
 	}
+	updateCalculatedFields(channelData.VideoCache)
+	for _, song := range channelData.VideoCache {
+		if song.Duet && song.OtherSinger == "" {
+			fmt.Printf("WARNING: found duet with no other singer! %s", song.SongTitle) // should never happen but debug in case it does!
+		}
+	}
 	topNSongs := calculateTopNSongs(channelData.VideoCache, 10)
 	topNSingers := calculateTopNSingers(channelData.VideoCache, 10)
 	var td = TemplateData{channelData.Name, channelData.Command, channelData.ExtraStrings, channelData.JoinTime, channelData.JoinTime.Format(irc.UTCFormat), false, channelData.HasLeft, AugmentSingsVideoStructSlice(channelData.VideoCache), topNSongs, topNSingers, vars["key"]}
@@ -408,28 +416,102 @@ func calculateTopNSongs(songCache []irc.SingsVideoStruct, howMany int) []SongSin
 	return ret
 }
 
+func IsLower(s string) bool {
+	for _, r := range s {
+		if !unicode.IsLower(r) && unicode.IsLetter(r) {
+			return false
+		}
+	}
+	return true
+}
+
+func unmangleSingerName(MangledCaseName string, songCache []irc.SingsVideoStruct) string {
+	options := make(map[string]string, 0)
+	for _, record := range songCache {
+		if strings.ToUpper(MangledCaseName) == strings.ToUpper(record.OtherSinger) {
+			options[record.OtherSinger] = "WHATEVER"
+		}
+	}
+	// One answer means we don't care upper, lower, mixed.
+	if len(options) == 1 {
+		for key := range options {
+			return key
+		}
+	}
+	// More than one is probably closed-beta where the name was lowercased.
+	for key := range options {
+		if !IsLower(key) {
+			return key
+		}
+	}
+	// Eep, we shouldn't get here, let's just return something.
+	for key := range options {
+		return key
+	}
+	return ""
+}
+
+func prependSong(x []SingerSings, y SingerSings) []SingerSings {
+	x = append(x, SingerSings{})
+	copy(x[1:], x)
+	x[0] = y
+	return x
+}
+
+type kv struct {
+	Key   string
+	Value int
+}
+
+func getHeap(m map[string]int) *KVHeap {
+	h := &KVHeap{}
+	heap.Init(h)
+	for k, v := range m {
+		heap.Push(h, kv{k, v})
+	}
+	return h
+}
+
+type KVHeap []kv
+
+func (h KVHeap) Len() int           { return len(h) }
+func (h KVHeap) Less(i, j int) bool { return h[i].Value > h[j].Value }
+func (h KVHeap) Swap(i, j int)      { h[i], h[j] = h[j], h[i] }
+
+func (h *KVHeap) Push(x interface{}) {
+	*h = append(*h, x.(kv))
+}
+
+func (h *KVHeap) Pop() interface{} {
+	old := *h
+	n := len(old)
+	x := old[n-1]
+	*h = old[0 : n-1]
+	return x
+}
+
 func calculateTopNSingers(songCache []irc.SingsVideoStruct, howMany int) []SingerSings {
 	songMap := map[string]int{}
+	songCount := 0
 	for _, record := range songCache {
 		if record.Duet {
-			sings := songMap[record.OtherSinger]
-			sings += 1
-			songMap[record.OtherSinger] = sings
+			sings := songMap[strings.ToUpper(record.OtherSinger)]
+			sings++
+			songCount++
+			songMap[strings.ToUpper(record.OtherSinger)] = sings
 		}
 	}
 	slice := make([]SingerSings, 0)
-	for key, value := range songMap {
-		ss := SingerSings{key, value}
+	h := getHeap(songMap)
+	for i := 0; i < howMany; i++ {
+		deets := heap.Pop(h)
+		position := i + 1
+		fmt.Printf("%d) %#v\n", position, deets)
+		ss := SingerSings{unmangleSingerName(deets.(kv).Key, songCache), deets.(kv).Value}
 		slice = append(slice, ss)
 	}
-	sort.SliceStable(slice, func(i, j int) bool {
-		return slice[i].Sings > slice[j].Sings
-	})
-	var ret []SingerSings
-	for i := 1; i <= howMany; i++ {
-		ret = append(ret, slice[i])
-	}
-	return ret
+	fmt.Printf("Considered %d songs, Shan has %d\n", songCount, songMap["SHANXOX_"])
+	return slice
 }
 
 func calculateLastSungSongDate(songCache []irc.SingsVideoStruct, SongTitle string) time.Time {
@@ -450,6 +532,9 @@ func calculateLastSungSingerDate(songCache []irc.SingsVideoStruct, Singer string
 		if strings.ToUpper(record.OtherSinger) == strings.ToUpper(Singer) {
 			if record.Date.After(t) {
 				t = record.Date
+				if strings.ToUpper(Singer) == "SHANXOX_" {
+					fmt.Printf("Last sang with %s (%s) %s", Singer, record.OtherSinger, t)
+				}
 			}
 		}
 	}

web/admin.html

@@ -147,7 +147,7 @@
                         </div>
                         <div style="width: 100%; overflow-y: scroll; display: none;" id="datapanel" class="controlpanel">
                           <table>
-                            <thead><tr><th>Published</th><th>Who</th><th>What</th><th>Last sang this song</th><th>Last dueted with performer</th></th></thead>
+                            <thead><tr><th>Published</th><th>What</th><th>Who</th><th>Last sang this song</th><th>Last dueted with performer</th></th></thead>
                             {{ range .SongData }}
                             <tr><td title="{{ .Date }}">{{ .NiceDate }}</td><td>{{ .SongTitle }}</td><td>{{ .OtherSinger }}</td><td title="{{ .LastSungSong }}">{{ .NiceLastSungSong }}</td><td title="{{ .LastSungSinger }}">{{ .NiceLastSungSinger }}</td></tr>
                             {{ end }}
@@ -164,6 +164,7 @@
                           <h3>Excel is not very good at handling CSV format it seems...</h3>
                           <p>It is important to "Import Data" not "Open" the csv in many cases (8 year old discussion of this behaviour here) - from that post the instructions are : </p>
                           <blockquote>In Excel, DATA tab, in the Get External Data subsection, click "From Text" and import your CSV in the Wizard.</blockquote>
+                          <p>LibreOffice calc kinda just works...just sayin' ;-)</p>
                         </div>
                         <div style="width: 100%; overflow-y: scroll; display: none;" id="botpanel" class="controlpanel">      
                           <h2>The bot isn't really ready yet... it just has the old Karaokards facility at the moment.  I woudn't bother inviting it yet.</h2>                    

web/data.csv

@@ -1,4 +1,4 @@
-Published,Who,What,Last sang this song,Last dueted with performer
+Published,What,Who,Last sang this song,Last dueted with performer
 {{ range .SongData -}}
 {{- .NiceDate }},"{{ .SongTitle }}",{{ .OtherSinger }},{{ .NiceLastSungSong }},{{ .NiceLastSungSinger }}
 {{ end }}

web/data.tsv

@@ -1,4 +1,4 @@
-Published	Who	What	Last sang this song	Last dueted with performer
+Published	What	Who	Last sang this song	Last dueted with performer
 {{ range .SongData -}}
 {{- .NiceDate }}	"{{ .SongTitle }}"	{{ .OtherSinger }}	{{ .NiceLastSungSong }}	{{ .NiceLastSungSinger }}
 {{ end }}