🎉🚀 May the concensus be with us!

voting/quorum/quorum.go

@@ -0,0 +1,103 @@
+package quorum
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Quorum uint8
+
+const (
+  Simple Quorum = iota
+  OneFifth
+  OneQuarter
+  OneThird
+  OneHalf
+  TwoFifths
+  TwoThirds
+  ThreeQuarters
+  ThreeFifths
+  FourFifths
+  Unanimous
+)
+
+func ValidQuorums() []Quorum {
+  return []Quorum{
+    Simple,
+    OneFifth, OneQuarter, OneThird, OneHalf,
+    TwoThirds, TwoFifths,
+    ThreeQuarters, ThreeFifths,
+    FourFifths,
+  }
+}
+
+func FromString(s string) (Quorum, error) {
+  for _, q := range ValidQuorums() {
+    if strings.ToUpper(q.String()) == strings.ToUpper(s) {
+      return q, nil
+    } 
+  }
+  return Simple, fmt.Errorf("inalid quorum: %s", s)
+}
+
+func (q Quorum) String() string {
+  switch q {
+  case Simple:
+    return "SIMPLE"
+  case OneFifth:
+    return "1/5"
+  case OneQuarter:
+    return "1/4"
+  case OneThird:
+    return "1/3"
+  case OneHalf:
+    return "1/2"
+  case TwoThirds:
+    return "2/3"
+  case TwoFifths:
+    return "2/5"
+  case ThreeQuarters:
+    return "3/4"
+  case ThreeFifths:
+    return "3/5"
+  case FourFifths:
+    return "4/5"
+  case Unanimous:
+    return "ALL"
+  default:
+    panic("this code should never be reached")
+  }
+}
+
+func (q Quorum) IsSatisfied(possibleVotes, totalVotes int) bool {
+  if totalVotes == 0 {
+    return false
+  }
+  switch q {
+  case Simple:
+    return true
+  case OneFifth:
+    return totalVotes * 5 >= possibleVotes
+  case OneQuarter:
+    return totalVotes * 4 >= possibleVotes
+  case OneThird:
+    return totalVotes * 3 >= possibleVotes
+  case OneHalf:
+    return totalVotes * 2 >= possibleVotes
+  case TwoThirds:
+    return totalVotes * 3 >= possibleVotes * 2
+  case TwoFifths:
+    return totalVotes * 5 >= possibleVotes * 2
+  case ThreeQuarters:
+    return totalVotes * 4 >= possibleVotes * 3
+  case ThreeFifths:
+    return totalVotes * 5 >= possibleVotes * 3
+  case FourFifths:
+    return totalVotes * 5 >= possibleVotes * 4
+  case Unanimous:
+    return totalVotes >= possibleVotes
+  default:
+    panic("this code should never be reached⚜️")
+  }
+  return false
+}