refactor(providers): reorganize provider packages and facades

pkg/providers/cli/codex_cli_credentials.go

@@ -0,0 +1,86 @@
+package cliprovider
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+// CodexHomeEnvVar is the environment variable that overrides the Codex CLI
+// home directory when resolving the codex auth.json credentials file.
+// Default: ~/.codex
+const CodexHomeEnvVar = "CODEX_HOME"
+
+// CodexCliAuth represents the ~/.codex/auth.json file structure.
+type CodexCliAuth struct {
+	Tokens struct {
+		AccessToken  string `json:"access_token"`
+		RefreshToken string `json:"refresh_token"`
+		AccountID    string `json:"account_id"`
+	} `json:"tokens"`
+}
+
+// ReadCodexCliCredentials reads OAuth tokens from the Codex CLI's auth.json file.
+// Expiry is estimated as file modification time + 1 hour (same approach as moltbot).
+func ReadCodexCliCredentials() (accessToken, accountID string, expiresAt time.Time, err error) {
+	authPath, err := resolveCodexAuthPath()
+	if err != nil {
+		return "", "", time.Time{}, err
+	}
+
+	data, err := os.ReadFile(authPath)
+	if err != nil {
+		return "", "", time.Time{}, fmt.Errorf("reading %s: %w", authPath, err)
+	}
+
+	var auth CodexCliAuth
+	if err = json.Unmarshal(data, &auth); err != nil {
+		return "", "", time.Time{}, fmt.Errorf("parsing %s: %w", authPath, err)
+	}
+
+	if auth.Tokens.AccessToken == "" {
+		return "", "", time.Time{}, fmt.Errorf("no access_token in %s", authPath)
+	}
+
+	stat, err := os.Stat(authPath)
+	if err != nil {
+		expiresAt = time.Now().Add(time.Hour)
+	} else {
+		expiresAt = stat.ModTime().Add(time.Hour)
+	}
+
+	return auth.Tokens.AccessToken, auth.Tokens.AccountID, expiresAt, nil
+}
+
+// CreateCodexCliTokenSource creates a token source that reads from ~/.codex/auth.json.
+// This allows the existing CodexProvider to reuse Codex CLI credentials.
+func CreateCodexCliTokenSource() func() (string, string, error) {
+	return func() (string, string, error) {
+		token, accountID, expiresAt, err := ReadCodexCliCredentials()
+		if err != nil {
+			return "", "", fmt.Errorf("reading codex cli credentials: %w", err)
+		}
+
+		if time.Now().After(expiresAt) {
+			return "", "", fmt.Errorf(
+				"codex cli credentials expired (auth.json last modified > 1h ago). Run: codex login",
+			)
+		}
+
+		return token, accountID, nil
+	}
+}
+
+func resolveCodexAuthPath() (string, error) {
+	codexHome := os.Getenv(CodexHomeEnvVar)
+	if codexHome == "" {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return "", fmt.Errorf("getting home dir: %w", err)
+		}
+		codexHome = filepath.Join(home, ".codex")
+	}
+	return filepath.Join(codexHome, "auth.json"), nil
+}