1 files changed, 132 insertions, 0 deletions
diff --git a/cli/flags.go b/cli/flags.go
new file mode 100644
index 0000000..a5aa276
--- /dev/null
+++ b/cli/flags.go
@@ -0,0 +1,132 @@
+package cli
+
+// TODO
+// Default values? Default string values? Parser must always return a value
+// Support invalid flag combinations?
+
+
+type Flag interface {
+    GetPatterns() []string
+    GetName() string
+    GetDescription() string
+    GetParser() Parser
+}
+
+func getFlagParser(flags []Flag) Parser {
+    var parsers []Parser
+
+    for _, flag := range flags {
+        parsers = append(parsers, flag.GetParser())
+    }
+
+    return FlagParser{parsers}
+}
+
+
+type BoolFlag struct {
+    Patterns []string
+    Name string
+    Description string
+    DefaultValue bool
+    OmitValue bool
+}
+
+func (self BoolFlag) GetName() string {
+    return self.Name    
+}
+
+func (self BoolFlag) GetPatterns() []string {
+    return self.Patterns
+}
+
+func (self BoolFlag) GetDescription() string {
+    return self.Description
+}
+
+func (self BoolFlag) GetParser() Parser {
+    var parsers []Parser
+    for _, p := range self.Patterns {
+        parsers = append(parsers, BoolFlagParser{
+            pattern: p,
+            key: self.Name,
+            omitValue: self.OmitValue,
+            defaultValue: self.DefaultValue,
+        })
+    }
+
+    if len(parsers) == 1 {
+        return parsers[0]
+    }
+    return ShortCircuitParser{parsers}
+}
+
+
+type StringFlag struct {
+    Patterns []string
+    Name string
+    Description string
+    DefaultValue string
+}
+
+func (self StringFlag) GetName() string {
+    return self.Name    
+}
+
+func (self StringFlag) GetPatterns() []string {
+    return self.Patterns
+}
+
+func (self StringFlag) GetDescription() string {
+    return self.Description
+}
+
+func (self StringFlag) GetParser() Parser {
+    var parsers []Parser
+    for _, p := range self.Patterns {
+        parsers = append(parsers, StringFlagParser{
+            pattern: p,
+            key: self.Name,
+            defaultValue: self.DefaultValue,
+        })
+    }
+
+    if len(parsers) == 1 {
+        return parsers[0]
+    }
+    return ShortCircuitParser{parsers}
+}
+
+type IntFlag struct {
+    Patterns []string
+    Name string
+    Description string
+    DefaultValue int64
+}
+
+func (self IntFlag) GetName() string {
+    return self.Name    
+}
+
+func (self IntFlag) GetPatterns() []string {
+    return self.Patterns
+}
+
+func (self IntFlag) GetDescription() string {
+    return self.Description
+}
+
+func (self IntFlag) GetParser() Parser {
+    var parsers []Parser
+    for _, p := range self.Patterns {
+        parsers = append(parsers, IntFlagParser{
+            pattern: p,
+            key: self.Name,
+            defaultValue: self.DefaultValue,
+        })
+    }
+
+    if len(parsers) == 1 {
+        return parsers[0]
+    }
+    return ShortCircuitParser{parsers}
+}