Added commands to set meta data, like owner, group and permissions of key.

CLAUDE.md

@@ -1,160 +0,0 @@
-# CLAUDE.md
-
-This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
-
-## Project Overview
-
-**kvs-sh** is an interactive CLI shell for the KVS (Key-Value Store) distributed database. Think `mongosh`, `psql`, or `redis-cli` but for KVS. Single Go file implementation (~600 lines) with readline support for command history and auto-completion.
-
-## KVS Server Reference
-
-The complete KVS server source code is located at `../kvs/` relative to this repository. Reference it when:
-- Understanding API contracts and response formats
-- Verifying authentication/authorization behavior
-- Checking endpoint paths and HTTP methods
-- Understanding data structures (StoredValue, Member, User, Group types)
-- Implementing new shell commands for backend features
-
-Key server locations:
-- `../kvs/server/handlers.go` - All API endpoint implementations
-- `../kvs/server/routes.go` - Route definitions and HTTP methods
-- `../kvs/types/types.go` - Canonical type definitions (StoredValue, etc.)
-- `../kvs/auth/` - JWT authentication and permission system details
-- `../kvs/README.md` - Complete API documentation with curl examples
-- `../kvs/CLAUDE.md` - Server architecture and development guidance
-
-When adding new commands to kvs-sh, always verify the actual backend implementation in `../kvs/` rather than making assumptions about API behavior.
-
-## Build & Run
-
-```bash
-# Build
-go build -o kvs-shell
-
-# Run
-./kvs-shell
-
-# Install to system
-go install
-```
-
-## Quick Start with Server
-
-```bash
-# 1. Start KVS server (in ../kvs/)
-cd ../kvs && ./kvs config.yaml
-
-# 2. Run shell
-./kvs-shell
-
-# 3. In shell:
-# connect http://localhost:8080
-# auth $KVS_ROOT_TOKEN
-# put test/data '{"hello":"world"}'
-```
-
-**Important:** If auth fails with "token not found", the database has old data. Either:
-- Create a new token via the API, or
-- Wipe database: `rm -rf ../kvs/data && mkdir ../kvs/data` (restart server to generate root token)
-
-## Testing
-
-```bash
-go test ./...
-```
-
-## Architecture
-
-### Single-File Design
-Everything lives in `main.go` - intentionally kept simple. The shell is a stateful REPL that maintains:
-- HTTP client connection to KVS backend
-- Current JWT auth token
-- In-memory profile storage (username, token, server URL combinations)
-- Active profile selection
-
-### Core Components
-
-**KVSClient (main.go:49)**: Central state container holding:
-- `baseURL`: KVS server endpoint
-- `currentToken`: JWT for authentication
-- `profiles`: In-memory map of saved user profiles (NOT persisted to disk yet)
-- `httpClient`: Reusable HTTP client with 30s timeout
-
-**Command Router (main.go:465)**: Main loop uses switch statement on first word of input, delegates to `handle*` methods
-
-**Command Parser (main.go:527)**: Custom parser respecting quotes - critical for JSON arguments like `put key '{"foo": "bar"}'`
-
-**Auto-completion (main.go:503)**: Prefix tree using readline library for tab completion of commands
-
-### HTTP Communication Pattern
-All API calls go through `doRequest()` (main.go:85) which:
-1. Serializes body to JSON if present
-2. Sets `Authorization: Bearer <token>` header if token exists
-3. Returns `(body, statusCode, error)` tuple
-4. Delegates HTTP status interpretation to caller
-
-### Key Backend API Mappings
-- `GET /kv/<key>` → Returns `StoredValue` with UUID, timestamp, data
-- `PUT /kv/<key>` → Accepts raw JSON, returns UUID + timestamp
-- `DELETE /kv/<key>` → Returns 204 on success
-- `GET /members/` → Returns array of cluster `Member` objects
-- `GET /api/users/<uuid>` → Returns `User` object
-- `GET /health` → Returns service status map
-
-### Type Definitions (main.go:18-46)
-Backend response structures are mirrored in the client:
-- `StoredValue`: The core KV response with UUID, timestamp (int64 unix millis), and `json.RawMessage` data
-- `Member`: Cluster member info with ID, address, last_seen timestamp
-- `User`: User record with nickname hash, groups array, created/updated timestamps
-- `Group`: Group definition (defined but not yet used in commands)
-
-### Profile System
-Profiles are in-memory only (see roadmap for persistence plan). When you `profile use <name>`, it swaps the client's token, userUUID, and baseURL atomically. The `*` marker in profile listings indicates active profile.
-
-### Color Scheme
-Uses fatih/color package with semantic coloring:
-- Cyan: labels, headers, structured data keys
-- Green: success messages, confirmations
-- Yellow: warnings, "not found" states
-- Red: errors, invalid usage
-- Magenta: banner/title text
-
-### Command Parsing - Critical Implementation Details
-
-**parseCommand()** (main.go:527-570): Handles both single (`'`) and double (`"`) quotes intelligently.
-
-**Key behavior:**
-- Quotes are **only stripped** when they delimit an entire argument (start and end)
-- Supports both `'` and `"` as quote delimiters
-- Tracks which quote type started the argument to handle nesting correctly
-- Preserves quotes that appear mid-argument (for unquoted JSON)
-
-**Examples:**
-```bash
-put key '{"foo":"bar"}'       # ✅ Strips outer ', preserves inner "
-put key {"foo":"bar"}         # ✅ Works (no spaces, compact JSON)
-put key {"foo": "bar"}        # ❌ Fails - spaces split into multiple args
-put key "{\"foo\":\"bar\"}"   # ✅ Works (escaped quotes in double-quoted arg)
-```
-
-**JSON Error Handling** (main.go:393-425):
-- `printJSONError()` provides user-friendly error messages with examples
-- Detects error type (invalid chars, incomplete JSON, etc.) and shows context-specific tips
-- Shows what input was received to help debug quoting issues
-
-## Backend Assumptions
-
-The shell expects the KVS backend to:
-1. Accept JWT tokens in `Authorization: Bearer <token>` header
-2. Return timestamps as Unix milliseconds (int64)
-3. Use standard REST semantics (404 for not found, 204 for delete, 200/201 for success)
-4. Accept raw JSON payloads for PUT operations (not wrapped in metadata)
-
-## Known Limitations & Roadmap Items
-
-1. **No persistent profiles** - restart loses all `profile add` data (roadmap #1)
-2. **No metadata commands** - backend supports owner/group/permissions but shell doesn't expose yet (roadmap #6)
-3. **No group management** - `Group` type defined but no CRUD operations (roadmap #5)
-4. **No TLS support** - HTTP only, no certificate handling (roadmap #8)
-5. **No tab completion for keys** - only completes command names, not dynamic keys from server (roadmap #10)
-6. **user create not implemented** - Listed in help but just shows "not implemented" message

main.go

@@ -2,12 +2,14 @@
 package main
 
 import (
+	"bufio"
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -235,15 +237,32 @@ func (c *KVSClient) handleGet(args []string) {
 }
 
 func (c *KVSClient) handlePut(args []string) {
-	if len(args) < 2 {
+	if len(args) < 1 {
 		fmt.Println(red("Usage: put <key> <json-data>"))
+		fmt.Println("Or: put <key> (then paste JSON on next line)")
 		return
 	}
 
+	var jsonStr string
+	if len(args) == 1 {
+		// Multiline mode - read from next input
+		fmt.Println(yellow("Enter JSON (Ctrl+D when done):"))
+		scanner := bufio.NewScanner(os.Stdin)
+		var lines []string
+		for scanner.Scan() {
+			lines = append(lines, scanner.Text())
+		}
+		jsonStr = strings.Join(lines, "\n")
+	} else {
+		// Single line mode
+		jsonStr = strings.Join(args[1:], " ")
+	}
+
 	// Parse JSON data
 	var data json.RawMessage
-	if err := json.Unmarshal([]byte(args[1]), &data); err != nil {
+	if err := json.Unmarshal([]byte(jsonStr), &data); err != nil {
-		printJSONError(args[1], err)
+		fmt.Println(red("Invalid JSON:"), err)
+		fmt.Println("Tip: Use proper JSON format with escaped quotes")
 		return
 	}
 
@@ -295,6 +314,134 @@ func (c *KVSClient) handleDelete(args []string) {
 	}
 }
 
+// handleMeta is the dispatcher for "meta" sub-commands
+func (c *KVSClient) handleMeta(args []string) {
+	if len(args) == 0 {
+		fmt.Println(red("Usage: meta <get|set> [options]"))
+		return
+	}
+
+	subCmd := args[0]
+	switch subCmd {
+	case "get":
+		c.handleMetaGet(args[1:])
+	case "set":
+		c.handleMetaSet(args[1:])
+	default:
+		fmt.Println(red("Unknown meta command:"), subCmd)
+		fmt.Println("Available commands: get, set")
+	}
+}
+
+// handleMetaGet fetches and displays metadata for a key
+func (c *KVSClient) handleMetaGet(args []string) {
+	if len(args) < 1 {
+		fmt.Println(red("Usage: meta get <key>"))
+		return
+	}
+	key := args[0]
+
+	respBody, status, err := c.doRequest("GET", "/kv/"+key+"/metadata", nil)
+	if err != nil {
+		fmt.Println(red("Error:"), err)
+		return
+	}
+
+	if status == http.StatusNotFound {
+		fmt.Println(yellow("No metadata found for key:"), key)
+		return
+	}
+
+	if status != http.StatusOK {
+		fmt.Printf(red("Error getting metadata (status %d):\n"), status)
+		fmt.Println(string(respBody))
+		return
+	}
+
+	// Struct to parse the metadata response
+	type MetaResponse struct {
+		OwnerUUID   string `json:"owner_uuid"`
+		GroupUUID   string `json:"group_uuid"`
+		Permissions int    `json:"permissions"`
+		CreatedAt   int64  `json:"created_at"`
+		UpdatedAt   int64  `json:"updated_at"`
+	}
+
+	var meta MetaResponse
+	if err := json.Unmarshal(respBody, &meta); err != nil {
+		fmt.Println(red("Error parsing metadata response:"), err)
+		return
+	}
+
+	fmt.Println(cyan("Metadata for key:"), key)
+	fmt.Printf("  Owner UUID:   %s\n", meta.OwnerUUID)
+	fmt.Printf("  Group UUID:   %s\n", meta.GroupUUID)
+	fmt.Printf("  Permissions:  %d\n", meta.Permissions)
+	fmt.Printf("  Created At:   %s\n", time.Unix(meta.CreatedAt, 0).Format(time.RFC3339))
+	fmt.Printf("  Updated At:   %s\n", time.Unix(meta.UpdatedAt, 0).Format(time.RFC3339))
+}
+
+// handleMetaSet updates metadata for a key using flags
+func (c *KVSClient) handleMetaSet(args []string) {
+	if len(args) < 3 {
+		fmt.Println(red("Usage: meta set <key> --owner <uuid> | --group <uuid> | --permissions <number>"))
+		return
+	}
+	key := args[0]
+	
+	// Use a map to build the JSON payload for partial updates
+	payload := make(map[string]interface{})
+
+	// Parse command-line flags
+	for i := 1; i < len(args); i++ {
+		switch args[i] {
+		case "--owner":
+			if i+1 < len(args) {
+				payload["owner_uuid"] = args[i+1]
+				i++ // Skip the value
+			}
+		case "--group":
+			if i+1 < len(args) {
+				payload["group_uuid"] = args[i+1]
+				i++ // Skip the value
+			}
+		case "--permissions":
+			if i+1 < len(args) {
+				perms, err := strconv.Atoi(args[i+1])
+				if err != nil {
+					fmt.Println(red("Invalid permissions value:"), args[i+1])
+					return
+				}
+				payload["permissions"] = perms
+				i++ // Skip the value
+			}
+		}
+	}
+
+	if len(payload) == 0 {
+		fmt.Println(red("No valid metadata fields provided to set."))
+		return
+	}
+
+	respBody, status, err := c.doRequest("PUT", "/kv/"+key+"/metadata", payload)
+	if err != nil {
+		fmt.Println(red("Error:"), err)
+		return
+	}
+
+	if status != http.StatusOK {
+		fmt.Printf(red("Error setting metadata (status %d):\n"), status)
+		fmt.Println(string(respBody))
+		return
+	}
+
+	fmt.Println(green("Metadata updated successfully for key:"), key)
+	// The response body contains the full updated metadata, so we can print it for confirmation
+	var pretty bytes.Buffer
+	json.Indent(&pretty, respBody, "", "  ")
+	fmt.Println(pretty.String())
+}
+
 func (c *KVSClient) handleMembers(args []string) {
 	respBody, status, err := c.doRequest("GET", "/members/", nil)
 	if err != nil {
@@ -390,38 +537,41 @@ func (c *KVSClient) handleUserGet(args []string) {
 	fmt.Printf("  Updated:       %s\n", time.Unix(user.UpdatedAt, 0).Format(time.RFC3339))
 }
 
-// printJSONError displays a user-friendly JSON parsing error with helpful hints
+func (c *KVSClient) handleUserCreate(args []string) {
-func printJSONError(input string, err error) {
+	if len(args) < 1 {
-	fmt.Println(red("❌ Invalid JSON:"), err)
+		fmt.Println(red("Usage: user create <nickname>"))
-	fmt.Println()
+		return
-
-	// Show what was received
-	if len(input) > 100 {
-		fmt.Println(yellow("Received:"), input[:100]+"...")
-	} else {
-		fmt.Println(yellow("Received:"), input)
 	}
-	fmt.Println()
 
-	// Provide helpful hints based on common errors
+	// The request body requires a JSON object like {"nickname": "..."}
-	errMsg := err.Error()
+	requestPayload := map[string]string{
-
+		"nickname": args[0],
-	if strings.Contains(errMsg, "looking for beginning of") ||
-	   strings.Contains(errMsg, "invalid character") {
-		fmt.Println(cyan("💡 Tip:"), "JSON with spaces needs quotes:")
-		fmt.Println(green("  ✓ Correct:"), "put key '{\"hello\":\"world\"}'")
-		fmt.Println(green("  ✓ Correct:"), "put key '{\"a\":1,\"b\":2}'")
-		fmt.Println(green("  ✓ Compact:"), "put key {\"a\":1,\"b\":2}  (no spaces)")
-		fmt.Println(red("  ✗ Wrong:  "), "put key {\"a\": 1, \"b\": 2}  (spaces without quotes)")
-	} else if strings.Contains(errMsg, "unexpected end of JSON") {
-		fmt.Println(cyan("💡 Tip:"), "JSON appears incomplete or cut off")
-		fmt.Println(green("  Check:"), "Are all brackets/braces matched? {}, []")
-		fmt.Println(green("  Check:"), "Did spaces split your JSON into multiple arguments?")
-	} else {
-		fmt.Println(cyan("💡 Tip:"), "Wrap JSON in quotes for complex values:")
-		fmt.Println(green("  Single quotes:"), "put key '{\"your\":\"json\"}'")
-		fmt.Println(green("  Double quotes:"), "put key \"{\\\"your\\\":\\\"json\\\"}\"")
 	}
+
+	respBody, status, err := c.doRequest("POST", "/api/users", requestPayload)
+	if err != nil {
+		fmt.Println(red("Error:"), err)
+		return
+	}
+
+	// The backend returns 200 OK on success
+	if status != http.StatusOK {
+		fmt.Printf(red("Error creating user (status %d):\n"), status)
+		fmt.Println(string(respBody))
+		return
+	}
+
+	// Parse the successful response to get the new user's UUID
+	var response struct {
+		UUID string `json:"uuid"`
+	}
+	if err := json.Unmarshal(respBody, &response); err != nil {
+		fmt.Println(red("Error parsing successful response:"), err)
+		return
+	}
+
+	fmt.Println(green("User created successfully"))
+	fmt.Println(cyan("UUID:"), response.UUID)
 }
 
 func (c *KVSClient) handleHelp(args []string) {
@@ -441,6 +591,11 @@ Key-Value Operations:
   put <key> <json>           - Store JSON value at key
   delete <key>               - Delete key
 
+Resource Metadata:
+  meta get <key>             - Get metadata (owner, group) for a key
+  meta set <key> [flags]     - Set metadata for a key
+    Flags: --owner <uuid>, --group <uuid>, --permissions <number>
+
 Cluster Management:
   members                    - List cluster members
   health                     - Check service health
@@ -516,14 +671,25 @@ func main() {
 			client.handlePut(args)
 		case "delete":
 			client.handleDelete(args)
+		case "meta":
+			client.handleMeta(args)
 		case "members":
 			client.handleMembers(args)
 		case "health":
 			client.handleHealth(args)
 		case "user":
-			if len(args) > 0 && args[0] == "get" {
+			if len(args) > 0 {
-				client.handleUserGet(args[1:])
+				switch args[0] {
+				case "get":
+					client.handleUserGet(args[1:])
+				case "create":
+					client.handleUserCreate(args[1:])
+				default:
+					fmt.Println(red("Unknown user command:"), args[0])
+					fmt.Println("Type 'help' for available commands")
+				}
 			} else {
+				// This was the original behavior, which notes that listing users is not implemented.
 				client.handleUserList(args)
 			}
 		default:
@@ -545,6 +711,14 @@ var completer = readline.NewPrefixCompleter(
 	readline.PcItem("get"),
 	readline.PcItem("put"),
 	readline.PcItem("delete"),
+	readline.PcItem("meta",
+		readline.PcItem("get"),
+		readline.PcItem("set",
+			readline.PcItem("--owner"),
+			readline.PcItem("--group"),
+			readline.PcItem("--permissions"),
+		),
+	),
 	readline.PcItem("members"),
 	readline.PcItem("health"),
 	readline.PcItem("user",
@@ -561,41 +735,35 @@ var completer = readline.NewPrefixCompleter(
 func parseCommand(line string) []string {
 	var parts []string
 	var current strings.Builder
-	var quoteChar byte // Track which quote char started this argument (' or ")
+	var quoteChar rune = 0 // Use a rune to store the active quote character (' or ")
-	inQuotes := false
 
-	for i := 0; i < len(line); i++ {
+	for _, ch := range line {
-		ch := line[i]
+		switch {
-
+		// If we see a quote character
-		// Check if this is a quote character at the start of a new argument
+		case ch == '\'' || ch == '"':
-		if (ch == '"' || ch == '\'') && current.Len() == 0 && !inQuotes {
+			if quoteChar == 0 {
-			// Starting a quoted argument - remember the quote type
+				// Not currently inside a quoted string, so start one
-			quoteChar = ch
+				quoteChar = ch
-			inQuotes = true
+			} else if quoteChar == ch {
-			continue // Don't add the quote itself
+				// Inside a quoted string and found the matching quote, so end it
-		}
+				quoteChar = 0
-
+			} else {
-		// Check if this is the closing quote
+				// Inside a quoted string but found the *other* type of quote, treat it as a literal character
-		if inQuotes && ch == quoteChar {
+				current.WriteRune(ch)
-			// End quoted argument
+			}
-			inQuotes = false
+		// If we see a space or tab and are NOT inside a quoted string
-			quoteChar = 0
+		case (ch == ' ' || ch == '\t') && quoteChar == 0:
-			continue // Don't add the quote itself
-		}
-
-		// Handle spaces/tabs
-		if (ch == ' ' || ch == '\t') && !inQuotes {
 			if current.Len() > 0 {
 				parts = append(parts, current.String())
 				current.Reset()
 			}
-			continue
+		// Any other character
+		default:
+			current.WriteRune(ch)
 		}
-
-		// Add all other characters (including quotes inside unquoted args)
-		current.WriteByte(ch)
 	}
 
+	// Add the last part if it exists
 	if current.Len() > 0 {
 		parts = append(parts, current.String())
 	}