initial commit of library & tests
diff --git a/cast.go b/cast.go
new file mode 100644
index 0000000..4bd3ba3
--- /dev/null
+++ b/cast.go
@@ -0,0 +1,48 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import "time"
+
+func ToBool(i interface{}) bool {
+ v, _ := ToBoolE(i)
+ return v
+}
+
+func ToTime(i interface{}) time.Time {
+ v, _ := ToTimeE(i)
+ return v
+}
+
+func ToFloat64(i interface{}) float64 {
+ v, _ := ToFloat64E(i)
+ return v
+}
+
+func ToInt(i interface{}) int {
+ v, _ := ToIntE(i)
+ return v
+}
+
+func ToString(i interface{}) string {
+ v, _ := ToStringE(i)
+ return v
+}
+
+func ToStringMapString(i interface{}) map[string]string {
+ v, _ := ToStringMapStringE(i)
+ return v
+}
+
+func ToStringMap(i interface{}) map[string]interface{} {
+ v, _ := ToStringMapE(i)
+ return v
+}
+
+func ToStringSlice(i interface{}) []string {
+ v, _ := ToStringSliceE(i)
+ return v
+}
diff --git a/cast_test.go b/cast_test.go
new file mode 100644
index 0000000..5a6dc3d
--- /dev/null
+++ b/cast_test.go
@@ -0,0 +1,26 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import (
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+)
+
+func TestToInt(t *testing.T) {
+ var eight interface{} = 8
+ assert.Equal(t, ToInt(8), 8)
+ assert.Equal(t, ToInt("8"), 8)
+ assert.Equal(t, ToInt(true), 1)
+ assert.Equal(t, ToInt(false), 0)
+ assert.Equal(t, ToInt(eight), 8)
+}
+
+func TestMaps(t *testing.T) {
+ var taxonomies = map[interface{}]interface{}{"tag": "tags", "group": "groups"}
+ assert.Equal(t, ToStringMap(taxonomies), map[string]interface{}{"tag": "tags", "group": "groups"})
+}
diff --git a/caste.go b/caste.go
new file mode 100644
index 0000000..49025fc
--- /dev/null
+++ b/caste.go
@@ -0,0 +1,199 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import (
+ "errors"
+ "fmt"
+ "strconv"
+ "time"
+
+ jww "github.com/spf13/jwalterweatherman"
+)
+
+func ToTimeE(i interface{}) (tim time.Time, ok bool) {
+ switch s := i.(type) {
+ case time.Time:
+ return s, true
+ case string:
+ d, e := StringToDate(s)
+ if e == nil {
+ return d, true
+ }
+
+ jww.ERROR.Println("Could not parse Date/Time format:", e)
+ return time.Time{}, false
+ default:
+ jww.ERROR.Printf("Unable to Cast %#v to Time", i)
+ return time.Time{}, false
+ }
+
+ return time.Time{}, false
+}
+
+func ToBoolE(i interface{}) (bool, bool) {
+ switch b := i.(type) {
+ case bool:
+ return b, true
+ case nil:
+ return false, true
+ case int:
+ if i.(int) > 0 {
+ return true, true
+ }
+ return false, true
+ default:
+ return false, false
+ jww.ERROR.Printf("Unable to Cast %#v to bool", i)
+ }
+
+ return false, false
+}
+
+func ToStringMapStringE(i interface{}) (map[string]string, bool) {
+ var m = map[string]string{}
+
+ switch v := i.(type) {
+ case map[interface{}]interface{}:
+ for k, val := range v {
+ m[ToString(k)] = ToString(val)
+ }
+ default:
+ return m, false
+ }
+
+ return m, true
+}
+
+func ToStringMapE(i interface{}) (map[string]interface{}, bool) {
+ var m = map[string]interface{}{}
+
+ switch v := i.(type) {
+ case map[interface{}]interface{}:
+ for k, val := range v {
+ m[ToString(k)] = val
+ }
+ default:
+ return m, false
+ }
+
+ return m, true
+}
+
+func ToStringSliceE(i interface{}) ([]string, bool) {
+ var a []string
+
+ switch v := i.(type) {
+ case []interface{}:
+ for _, u := range v {
+ a = append(a, ToString(u))
+ }
+ default:
+ return a, false
+ }
+
+ return a, true
+}
+
+func ToFloat64E(i interface{}) (float64, bool) {
+ switch s := i.(type) {
+ case float64:
+ return s, true
+ case float32:
+ return float64(s), true
+
+ case string:
+ v, err := strconv.ParseFloat(s, 64)
+ if err == nil {
+ return float64(v), true
+ } else {
+ jww.ERROR.Printf("Unable to Cast %#v to float", i)
+ jww.ERROR.Println(err)
+ }
+
+ default:
+ jww.ERROR.Printf("Unable to Cast %#v to float", i)
+ }
+
+ return 0.0, false
+}
+
+func ToIntE(i interface{}) (int, bool) {
+ switch s := i.(type) {
+ case int:
+ return s, true
+ case int64:
+ return int(s), true
+ case int32:
+ return int(s), true
+ case int16:
+ return int(s), true
+ case int8:
+ return int(s), true
+ case string:
+ v, err := strconv.ParseInt(s, 0, 0)
+ if err == nil {
+ return int(v), true
+ } else {
+ jww.ERROR.Printf("Unable to Cast %#v to int", i)
+ jww.ERROR.Println(err)
+ }
+ case bool:
+ if bool(s) {
+ return 1, true
+ } else {
+ return 0, true
+ }
+ default:
+ jww.ERROR.Printf("Unable to Cast %#v to int", i)
+ }
+
+ return 0, false
+}
+
+func ToStringE(i interface{}) (string, bool) {
+ switch s := i.(type) {
+ case string:
+ return s, true
+ case float64:
+ return strconv.FormatFloat(i.(float64), 'f', -1, 64), true
+ case int:
+ return strconv.FormatInt(int64(i.(int)), 10), true
+ case nil:
+ return "", true
+ default:
+ jww.ERROR.Printf("Unable to Cast %#v to string", i)
+ }
+
+ return "", false
+}
+
+func StringToDate(s string) (time.Time, error) {
+ return parseDateWith(s, []string{
+ time.RFC3339,
+ "2006-01-02T15:04:05", // iso8601 without timezone
+ time.RFC1123Z,
+ time.RFC1123,
+ time.RFC822Z,
+ time.RFC822,
+ time.ANSIC,
+ time.UnixDate,
+ time.RubyDate,
+ "2006-01-02 15:04:05Z07:00",
+ "02 Jan 06 15:04 MST",
+ "2006-01-02",
+ "02 Jan 2006",
+ })
+}
+
+func parseDateWith(s string, dates []string) (d time.Time, e error) {
+ for _, dateType := range dates {
+ if d, e = time.Parse(dateType, s); e == nil {
+ return
+ }
+ }
+ return d, errors.New(fmt.Sprintf("Unable to parse date: %s", s))
+}
