Split isupport to its' own subpackage

irc/isupport.go

@@ -1,149 +0,0 @@
-// Copyright (c) 2016 Daniel Oaks <daniel@danieloaks.net>
-// released under the MIT license
-
-package irc
-
-import "fmt"
-import "sort"
-
-const isupportSupportedString = "are supported by this server"
-
-// ISupportList holds a list of ISUPPORT tokens
-type ISupportList struct {
-	Tokens      map[string]*string
-	CachedReply [][]string
-}
-
-// NewISupportList returns a new ISupportList
-func NewISupportList() *ISupportList {
-	var il ISupportList
-	il.Tokens = make(map[string]*string)
-	il.CachedReply = make([][]string, 0)
-	return &il
-}
-
-// Add adds an RPL_ISUPPORT token to our internal list
-func (il *ISupportList) Add(name string, value string) {
-	il.Tokens[name] = &value
-}
-
-// AddNoValue adds an RPL_ISUPPORT token that does not have a value
-func (il *ISupportList) AddNoValue(name string) {
-	il.Tokens[name] = nil
-}
-
-// getTokenString gets the appropriate string for a token+value.
-func getTokenString(name string, value *string) string {
-	if value == nil {
-		return name
-	}
-	return fmt.Sprintf("%s=%s", name, *value)
-}
-
-// GetDifference returns the difference between two token lists.
-func (il *ISupportList) GetDifference(newil *ISupportList) [][]string {
-	var outTokens sort.StringSlice
-
-	// append removed tokens
-	for name := range il.Tokens {
-		_, exists := newil.Tokens[name]
-		if exists {
-			continue
-		}
-
-		token := fmt.Sprintf("-%s", name)
-
-		outTokens = append(outTokens, token)
-	}
-
-	// append added tokens
-	for name, value := range newil.Tokens {
-		newval, exists := il.Tokens[name]
-		if exists && ((value == nil && newval == nil) || (value != nil && newval != nil && *value == *newval)) {
-			continue
-		}
-
-		token := getTokenString(name, value)
-
-		outTokens = append(outTokens, token)
-	}
-
-	sort.Sort(outTokens)
-
-	// create output list
-	replies := make([][]string, 0)
-	var length int     // Length of the current cache
-	var cache []string // Token list cache
-
-	for _, token := range outTokens {
-		if len(token)+length <= maxLastArgLength {
-			// account for the space separating tokens
-			if len(cache) > 0 {
-				length++
-			}
-			cache = append(cache, token)
-			length += len(token)
-		}
-
-		if len(cache) == 13 || len(token)+length >= maxLastArgLength {
-			cache = append(cache, isupportSupportedString)
-			replies = append(replies, cache)
-			cache = make([]string, 0)
-			length = 0
-		}
-	}
-
-	if len(cache) > 0 {
-		cache = append(cache, isupportSupportedString)
-		replies = append(replies, cache)
-	}
-
-	return replies
-}
-
-// RegenerateCachedReply regenerates the cached RPL_ISUPPORT reply
-func (il *ISupportList) RegenerateCachedReply() {
-	il.CachedReply = make([][]string, 0)
-	var length int     // Length of the current cache
-	var cache []string // Token list cache
-
-	// make sure we get a sorted list of tokens, needed for tests and looks nice
-	var tokens sort.StringSlice
-	for name := range il.Tokens {
-		tokens = append(tokens, name)
-	}
-	sort.Sort(tokens)
-
-	for _, name := range tokens {
-		token := getTokenString(name, il.Tokens[name])
-
-		if len(token)+length <= maxLastArgLength {
-			// account for the space separating tokens
-			if len(cache) > 0 {
-				length++
-			}
-			cache = append(cache, token)
-			length += len(token)
-		}
-
-		if len(cache) == 13 || len(token)+length >= maxLastArgLength {
-			cache = append(cache, isupportSupportedString)
-			il.CachedReply = append(il.CachedReply, cache)
-			cache = make([]string, 0)
-			length = 0
-		}
-	}
-
-	if len(cache) > 0 {
-		cache = append(cache, isupportSupportedString)
-		il.CachedReply = append(il.CachedReply, cache)
-	}
-}
-
-// RplISupport outputs our ISUPPORT lines to the client. This is used on connection and in VERSION responses.
-func (client *Client) RplISupport() {
-	for _, tokenline := range client.server.getISupport().CachedReply {
-		// ugly trickery ahead
-		client.Send(nil, client.server.name, RPL_ISUPPORT, append([]string{client.nick}, tokenline...)...)
-	}
-}