REST API and Web UI Now Support Dynamic Pattern Variables

restapi/chat.go

@@ -24,12 +24,13 @@ type ChatHandler struct {
 }
 
 type PromptRequest struct {
-	UserInput    string `json:"userInput"`
-	Vendor       string `json:"vendor"`
-	Model        string `json:"model"`
-	ContextName  string `json:"contextName"`
-	PatternName  string `json:"patternName"`
-	StrategyName string `json:"strategyName"` // Optional strategy name
+	UserInput    string            `json:"userInput"`
+	Vendor       string            `json:"vendor"`
+	Model        string            `json:"model"`
+	ContextName  string            `json:"contextName"`
+	PatternName  string            `json:"patternName"`
+	StrategyName string            `json:"strategyName"`        // Optional strategy name
+	Variables    map[string]string `json:"variables,omitempty"` // Pattern variables
 }
 
 type ChatRequest struct {
@@ -118,9 +119,10 @@ func (h *ChatHandler) HandleChat(c *gin.Context) {
 						Role:    "user",
 						Content: p.UserInput,
 					},
-					PatternName: p.PatternName,
-					ContextName: p.ContextName,
-					Language:    request.Language, // Pass the language field
+					PatternName:      p.PatternName,
+					ContextName:      p.ContextName,
+					PatternVariables: p.Variables,      // Pass pattern variables
+					Language:         request.Language, // Pass the language field
 				}
 
 				opts := &common.ChatOptions{

restapi/docs/API_VARIABLES_EXAMPLE.md

@@ -0,0 +1,105 @@
+# REST API Pattern Variables Example
+
+This example demonstrates how to use pattern variables in REST API calls to the `/chat` endpoint.
+
+## Example: Using the `translate` pattern with variables
+
+### Request
+
+```json
+{
+  "prompts": [
+    {
+      "userInput": "Hello my name is Kayvan",
+      "patternName": "translate",
+      "model": "gpt-4o",
+      "vendor": "openai",
+      "contextName": "",
+      "strategyName": "",
+      "variables": {
+        "lang_code": "fr"
+      }
+    }
+  ],
+  "language": "en",
+  "temperature": 0.7,
+  "topP": 0.9,
+  "frequencyPenalty": 0.0,
+  "presencePenalty": 0.0
+}
+```
+
+### Pattern Content
+
+The `translate` pattern contains:
+
+```markdown
+You are an expert translator... translate them as accurately and perfectly as possible into the language specified by its language code {{lang_code}}...
+
+...
+
+- Translate the document as accurately as possible keeping a 1:1 copy of the original text translated to {{lang_code}}.
+
+{{input}}
+```
+
+### How it works
+
+1. The pattern is loaded from `patterns/translate/system.md`
+2. The `{{lang_code}}` variable is replaced with `"fr"` from the variables map
+3. The `{{input}}` placeholder is replaced with `"Hello my name is Kayvan"`
+4. The resulting processed pattern is sent to the AI model
+
+### Expected Result
+
+The AI would receive a prompt asking it to translate "Hello my name is Kayvan" to French (fr), and would respond with something like "Bonjour, je m'appelle Kayvan".
+
+## Testing with curl
+
+```bash
+curl -X POST http://localhost:8080/api/chat \
+  -H "Content-Type: application/json" \
+  -d '{
+    "prompts": [
+      {
+        "userInput": "Hello my name is Kayvan",
+        "patternName": "translate",
+        "model": "gpt-4o",
+        "vendor": "openai",
+        "variables": {
+          "lang_code": "fr"
+        }
+      }
+    ],
+    "temperature": 0.7
+  }'
+```
+
+## Multiple Variables Example
+
+For patterns that use multiple variables:
+
+```json
+{
+  "prompts": [
+    {
+      "userInput": "Analyze this business model",
+      "patternName": "custom_analysis",
+      "model": "gpt-4o",
+      "variables": {
+        "role": "expert consultant",
+        "experience": "15",
+        "focus_areas": "revenue, scalability, market fit",
+        "output_format": "bullet points"
+      }
+    }
+  ]
+}
+```
+
+## Implementation Details
+
+- Variables are passed in the `variables` field as a key-value map
+- Variables are processed using Go's template system
+- The `{{input}}` variable is automatically handled and should not be included in the variables map
+- Variables support the same features as CLI variables (plugins, extensions, etc.)

restapi/patterns.go

@@ -15,20 +15,70 @@ type PatternsHandler struct {
 
 // NewPatternsHandler creates a new PatternsHandler
 func NewPatternsHandler(r *gin.Engine, patterns *fsdb.PatternsEntity) (ret *PatternsHandler) {
-	ret = &PatternsHandler{
-		StorageHandler: NewStorageHandler(r, "patterns", patterns), patterns: patterns}
+	// Create a storage handler but don't register any routes yet
+	storageHandler := &StorageHandler[fsdb.Pattern]{storage: patterns}
+	ret = &PatternsHandler{StorageHandler: storageHandler, patterns: patterns}
 
-	// TODO: Add custom, replacement routes here
-	//r.GET("/patterns/:name", ret.Get)
+	// Register routes manually - use custom Get for patterns, others from StorageHandler
+	r.GET("/patterns/:name", ret.Get)                       // Custom method with variables support
+	r.GET("/patterns/names", ret.GetNames)                  // From StorageHandler
+	r.DELETE("/patterns/:name", ret.Delete)                 // From StorageHandler
+	r.GET("/patterns/exists/:name", ret.Exists)             // From StorageHandler
+	r.PUT("/patterns/rename/:oldName/:newName", ret.Rename) // From StorageHandler
+	r.POST("/patterns/:name", ret.Save)                     // From StorageHandler
+	// Add POST route for patterns with variables in request body
+	r.POST("/patterns/:name/apply", ret.ApplyPattern)
 	return
 }
 
-// Get handles the GET /patterns/:name route
+// Get handles the GET /patterns/:name route - returns raw pattern without variable processing
 func (h *PatternsHandler) Get(c *gin.Context) {
 	name := c.Param("name")
-	variables := make(map[string]string) // Assuming variables are passed somehow
-	input := ""                          // Assuming input is passed somehow
-	pattern, err := h.patterns.GetApplyVariables(name, variables, input)
+
+	// Get the raw pattern content without any variable processing
+	content, err := h.patterns.Load(name + "/" + h.patterns.SystemPatternFile)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	// Return raw pattern in the same format as the processed patterns
+	pattern := &fsdb.Pattern{
+		Name:        name,
+		Description: "",
+		Pattern:     string(content),
+	}
+	c.JSON(http.StatusOK, pattern)
+}
+
+// PatternApplyRequest represents the request body for applying a pattern
+type PatternApplyRequest struct {
+	Input     string            `json:"input"`
+	Variables map[string]string `json:"variables,omitempty"`
+}
+
+// ApplyPattern handles the POST /patterns/:name/apply route
+func (h *PatternsHandler) ApplyPattern(c *gin.Context) {
+	name := c.Param("name")
+
+	var request PatternApplyRequest
+	if err := c.ShouldBindJSON(&request); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	// Merge query parameters with request body variables (body takes precedence)
+	variables := make(map[string]string)
+	for key, values := range c.Request.URL.Query() {
+		if len(values) > 0 {
+			variables[key] = values[0]
+		}
+	}
+	for key, value := range request.Variables {
+		variables[key] = value
+	}
+
+	pattern, err := h.patterns.GetApplyVariables(name, variables, request.Input)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, err.Error())
 		return