Feat: token use estimation

2 files changed, 80 insertions, 1 deletions

diff --git a/bot.go b/bot.go
index 5d9cf03..5ae215f 100644
--- a/bot.go
+++ b/bot.go
@@ -63,7 +63,9 @@ var (
 		"google/gemma-3-27b-it:free",
 		"meta-llama/llama-3.3-70b-instruct:free",
 	}
-	LocalModels = []string{}
+	LocalModels     = []string{}
+	localModelsData *models.LCPModels
+	orModelsData    *models.ORModels
 )
 
 var thinkBlockRE = regexp.MustCompile(`(?s)<think>.*?</think>`)
@@ -355,6 +357,7 @@ func fetchORModels(free bool) ([]string, error) {
 	if err := json.NewDecoder(resp.Body).Decode(data); err != nil {
 		return nil, err
 	}
+	orModelsData = data
 	freeModels := data.ListModels(free)
 	return freeModels, nil
 }
@@ -416,6 +419,7 @@ func fetchLCPModelsWithStatus() (*models.LCPModels, error) {
 	if err := json.NewDecoder(resp.Body).Decode(data); err != nil {
 		return nil, err
 	}
+	localModelsData = data
 	return data, nil
 }
 
diff --git a/helpfuncs.go b/helpfuncs.go
index b63995c..7d7b65b 100644
--- a/helpfuncs.go
+++ b/helpfuncs.go
@@ -11,6 +11,7 @@ import (
 	"path"
 	"path/filepath"
 	"slices"
+	"strconv"
 	"strings"
 	"time"
 	"unicode"
@@ -376,9 +377,83 @@ func makeStatusLine() string {
 		roleInject := fmt.Sprintf(" | [%s:-:b]role injection[-:-:-] (alt+7)", boolColors[injectRole])
 		statusLine += roleInject
 	}
+	// context tokens
+	contextTokens := getContextTokens()
+	maxCtx := getMaxContextTokens()
+	if maxCtx == 0 {
+		maxCtx = 16384
+	}
+	if contextTokens > 0 {
+		contextInfo := fmt.Sprintf(" | context: [cyan:-:b]%d/%d[-:-:-]", contextTokens, maxCtx)
+		statusLine += contextInfo
+	}
 	return statusLine + imageInfo + shellModeInfo
 }
 
+func getContextTokens() int {
+	if chatBody == nil || chatBody.Messages == nil {
+		return 0
+	}
+	total := 0
+	for _, msg := range chatBody.Messages {
+		if msg.Stats != nil {
+			total += msg.Stats.Tokens
+		}
+	}
+	return total
+}
+
+const deepseekContext = 128000
+
+func getMaxContextTokens() int {
+	if chatBody == nil || chatBody.Model == "" {
+		return 0
+	}
+	modelName := chatBody.Model
+	if strings.Contains(cfg.CurrentAPI, "openrouter") {
+		if orModelsData != nil {
+			for _, m := range orModelsData.Data {
+				if m.ID == modelName {
+					return m.ContextLength
+				}
+			}
+		}
+	} else if strings.Contains(cfg.CurrentAPI, "deepseek") {
+		return deepseekContext
+	} else {
+		if localModelsData != nil {
+			for _, m := range localModelsData.Data {
+				if m.ID == modelName {
+					for _, arg := range m.Status.Args {
+						if strings.HasPrefix(arg, "--ctx-size") {
+							if strings.Contains(arg, "=") {
+								val := strings.Split(arg, "=")[1]
+								if n, err := strconv.Atoi(val); err == nil {
+									return n
+								}
+							} else {
+								idx := -1
+								for i, a := range m.Status.Args {
+									if a == "--ctx-size" && i+1 < len(m.Status.Args) {
+										idx = i + 1
+										break
+									}
+								}
+								if idx != -1 {
+									if n, err := strconv.Atoi(m.Status.Args[idx]); err == nil {
+										return n
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	return 0
+}
+
 // set of roles within card definition and mention in chat history
 func listChatRoles() []string {
 	currentChat, ok := chatMap[activeChatName]