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-rw-r--r--bin-src/util/date.go51
1 files changed, 51 insertions, 0 deletions
diff --git a/bin-src/util/date.go b/bin-src/util/date.go
new file mode 100644
index 0000000..3b5c457
--- /dev/null
+++ b/bin-src/util/date.go
@@ -0,0 +1,51 @@
+package util
+
+import (
+ "html/template"
+ "time"
+)
+
+func Date2HTML(t time.Time) template.HTML {
+ return template.HTML(t.Local().Format("<time datetime=\"2006-01-02 15:04:05\" title=\"2006-01-02 15:04:05\">2006-01-02 <span class=time>15:04:05</span></time>"))
+}
+
+func DateTime2HTML(t time.Time) template.HTML {
+ return template.HTML(t.Local().Format("<time datetime=\"2006-01-02 15:04:05\">2006-01-02 15:04:05</time>"))
+}
+
+func DateTime2ColorHTML(t time.Time) template.HTML {
+ return template.HTML(t.Local().Format("<time class=daily datetime=\"2006-01-02 15:04:05\">2006-01-02 15:04:05</time>"))
+}
+
+type TimeRange struct {
+ A, B time.Time
+}
+
+func (tr TimeRange) ToPct(point time.Time) float64 {
+ dur_ab := tr.B.Sub(tr.A)
+ dur_ap := point.Sub(tr.A)
+ return float64(dur_ap) / float64(dur_ab)
+}
+
+type ByteRange struct {
+ A, B byte
+}
+
+func (br ByteRange) FromPct(pct float64) byte {
+ ab := int16(br.B) - int16(br.A)
+ ap := int16(pct * float64(ab))
+ return byte(int16(br.A) + ap)
+}
+
+func PctCap(pct float64) float64 {
+ if pct < 0 {
+ pct = 0
+ } else if pct > 1 {
+ pct = 1
+ }
+ return pct
+}
+
+func MapRange(tr TimeRange, br ByteRange, t time.Time) byte {
+ return br.FromPct(PctCap(tr.ToPct(t)))
+}