Add little UI script using fzf (#25)

* added Taglist template helper
* added simple fzf ui script

app/db.go

@@ -62,6 +62,10 @@ type DbTag struct {
 	Keys []string `json:"key"`
 }
 
+func (entry *DbEntry) Taglist() string {
+	return strings.Join(entry.Tags, ",")
+}
+
 const BucketData string = "data"
 
 func GetDbFile(file string) string {

contrib/anydbui

@@ -0,0 +1,95 @@
+#!/bin/sh
+
+template="{{.Key}} {{.Created.AsTime.Year}}-{{.Created.AsTime.Month}}-{{.Created.AsTime.Day}} {{.Taglist}} {{.Preview}}"
+header="TITLE DATE TAGS PREVIEW"
+
+# its possible to use another version of anydb for testing purposes
+anydb="${ANYDB:-anydb}"
+
+# list command
+command="( echo '$header'; $anydb ls -m template --template '$template' ) | column -t -l4"
+
+for binary in fzf $anydb column diff awk less; do
+    if ! type $binary > /dev/null 2>&1; then
+        echo "$binary is not installed!"
+        exit 1
+    fi
+done
+
+if type gum > /dev/null 2>&1; then
+    GUM=1
+fi
+
+_rand() {
+    awk 'BEGIN {srand(); printf( "%d\n", 1024 * rand() )}'
+}
+
+_list() {
+    (
+        echo "$header"
+        $anydb ls -m template --template "$template"
+    ) | column -t -l4
+}
+
+_updater() {
+    _port="$1"
+    _cache="/tmp/anydbcache.$port"
+    _current="/tmp/anydbcache.$port.current"
+
+    touch $_current $_cache
+
+    while :; do
+        sleep 10
+
+        _list > $_current
+
+        if ! diff -q $_current $_cache > /dev/null 2>&1; then
+            curl -d "reload($command)+clear-screen" "http://127.0.0.1:$_port"
+        fi
+        cp $_current $_cache
+    done
+}
+
+_cleanup() {
+     # get rid of the update child
+    kill $pid
+
+    # clean up reloader cache
+    rm -f /tmp/anydbcache.${port}*
+}
+
+
+
+# fork background updater
+port=$((8000 + $(_rand) % 1000))
+_updater $port &
+pid=$!
+
+db=$($anydb info | grep Database | cut -d: -f2)
+shorthelp="$db - [enter]read  [c-e]edit  [c-k]kill  [c-c]exit  [c-k]delete"
+
+if test -n "$GUM"; then
+    color="Color \"#ff\" \"#0000ff\"" # white on blue
+    db="{{ $color \"Database:\"}}$db"
+    enter="{{ $color \"[Enter]\"}} Read"
+    edit="{{ $color \"[ctrl-c]\"}} Edit"
+    delete="{{ $color \"[ctrl-k]\"}} Delete"
+    template="$db $enter $edit $delete"
+    shorthelp=$(echo "$template" | gum format -t template)
+fi
+
+trap '_cleanup; (exit $?); exit' INT TERM EXIT
+
+: | command="$command" fzf \
+           --bind "start:reload:$command" \
+            --header-lines 1 --layout=reverse --info=inline \
+            --height 100% --pointer="→" --separator="─" \
+            --scrollbar="│" --preview-window "right:50%" \
+            --border-label="$shorthelp" \
+            --border=bottom --layout=reverse --info=inline \
+            --height 100% --header-first --cycle --header-lines=1 --listen=$port \
+            --bind "enter:execute: clear; $anydb get {1} | less" \
+            --bind "ctrl-e:execute: $anydb edit {1}" \
+            --bind "ctrl-k:execute:$anydb del {1}"
+            
+