/k/ shows a tagcloud now

db_fileutil.go

@@ -3,6 +3,7 @@ package main
 import (
 	"github.com/vbatts/imgsrv/hash"
 	"github.com/vbatts/imgsrv/types"
+	"labix.org/v2/mgo"
 	"labix.org/v2/mgo/bson"
 )
 
@@ -58,3 +59,34 @@ func HasFileByKeyword(keyword string) (exists bool, err error) {
 	exists = (c > 0)
 	return exists, nil
 }
+
+func GetKeywords() (kp []types.KeywordCount, err error) {
+	job := &mgo.MapReduce{
+		Map: `
+    function() {
+        if (!this.metadata.keywords) {
+          return;
+        }
+
+        for (index in this.metadata.keywords) {
+          emit(this.metadata.keywords[index], 1);
+        }
+    }
+    `,
+		Reduce: `
+    function(previous, current) {
+      var count = 0;
+
+      for (index in current) {
+        count += current[index];
+      }
+
+      return count;
+    }
+    `,
+	}
+	if _, err := gfs.Find(nil).MapReduce(job, &kp); err != nil {
+		return kp, err
+	}
+	return kp, nil
+}

layouts.go

@@ -2,9 +2,10 @@ package main
 
 import (
 	"fmt"
-	"github.com/vbatts/imgsrv/types"
 	"io"
 	"text/template"
+
+	"github.com/vbatts/imgsrv/types"
 )
 
 var emptyInterface interface{}
@@ -164,6 +165,28 @@ var listTemplateHTML = `
 {{end}}
 `
 
+var tagcloudTemplate = template.Must(template.New("tagcloud").Parse(tagcloudTemplateHTML))
+var tagcloudTemplateHTML = `
+{{if .}}
+<div id="keywordTagCloud">
+{{range .}}
+<a href="/k/{{.Id}}" rel="{{.Value}}">{{.Id}}</a>
+{{end}}
+</div>
+{{end}}
+
+<script>
+$.fn.tagcloud.defaults = {
+  size: {start: 9, end: 40, unit: 'pt'},
+  color: {start: '#007ab7', end: '#e55b00'}
+};
+
+$(function () {
+  $('#keywordTagCloud a').tagcloud();
+});
+</script>
+`
+
 var fileViewImageTemplate = template.Must(template.New("file").Parse(fileViewImageTemplateHTML))
 var fileViewImageTemplateHTML = `
 {{if .}}
@@ -359,3 +382,30 @@ func ListFilesPage(w io.Writer, files []types.File) (err error) {
 	}
 	return
 }
+
+func ListKeywordsPage(w io.Writer, kc []types.KeywordCount) (err error) {
+	err = headTemplate.Execute(w, map[string]string{"title": "FileSrv"})
+	if err != nil {
+		return err
+	}
+	err = navbarTemplate.Execute(w, nil)
+	if err != nil {
+		return err
+	}
+	err = containerBeginTemplate.Execute(w, nil)
+	if err != nil {
+		return err
+	}
+
+	// main context of this page
+	err = tagcloudTemplate.Execute(w, kc)
+	if err != nil {
+		return err
+	}
+
+	err = tailTemplate.Execute(w, map[string]string{"footer": fmt.Sprintf("Version: %s", VERSION)})
+	if err != nil {
+		return err
+	}
+	return
+}

server.go

@@ -441,7 +441,17 @@ func routeKeywords(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	} else if len(uriChunks) == 1 || (len(uriChunks) == 2 && len(uriChunks[1]) == 0) {
-		routeRoot(w, r)
+		// Path: /k/
+		// show a tag cloud!
+		kc, err := GetKeywords()
+		if err != nil {
+			serverErr(w, r, err)
+			return
+		}
+		err = ListKeywordsPage(w, kc)
+		if err != nil {
+			serverErr(w, r, err)
+		}
 		return
 	}
 
@@ -449,11 +459,13 @@ func routeKeywords(w http.ResponseWriter, r *http.Request) {
 
 	var iter *mgo.Iter
 	if uriChunks[len(uriChunks)-1] == "r" {
+		// Path: /k/
 		// TODO determine how to show a random image by keyword ...
 		log.Println("random isn't built yet")
 		httplog.LogRequest(r, 404)
 		return
 	} else if len(uriChunks) == 2 {
+		// Path: /k/:name
 		log.Println(uriChunks[1])
 		iter = gfs.Find(bson.M{"metadata.keywords": uriChunks[1]}).Sort("-metadata.timestamp").Limit(defaultPageLimit).Iter()
 	}

types/types.go

@@ -42,3 +42,12 @@ func (f *File) IsAudio() bool {
 	f.SetContentType()
 	return strings.HasPrefix(f.ContentType, "audio")
 }
+
+/*
+Structure used for collecting the keyword usage for the tag cloud
+*/
+type KeywordCount struct {
+	Id       string "_id"
+	Value int
+}
+