update

src/utils.jl

@@ -153,9 +153,79 @@ function formatMsgForLLM(preparedContext::Vector{agentMessage})::Dict{String, An
   )
   """
 
-  # convert various messages to openai message format
+  messages = Dict{String, Any}[]
 
-  return openai_message
+  for msg in preparedContext
+    if msg isa userMessage
+      push!(messages, _userMessageToOpenAI(msg))
+    elseif msg isa assistantMessage
+      push!(messages, _assistantMessageToOpenAI(msg))
+    elseif msg isa toolResultMessage
+      push!(messages, _toolResultMessageToOpenAI(msg))
+    end
+  end
+
+  return Dict("messages" => messages)
+end
+
+
+"""
+Convert a userMessage to OpenAI message format.
+"""
+function _userMessageToOpenAI(msg::userMessage)::Dict{String, Any}
+  return Dict(
+    "role" => "user",
+    "content" => _messageContentToBlocks(msg.content)
+  )
+end
+
+
+"""
+Convert an assistantMessage to OpenAI message format.
+"""
+function _assistantMessageToOpenAI(msg::assistantMessage)::Dict{String, Any}
+  return Dict(
+    "role" => "assistant",
+    "content" => _messageContentToBlocks(msg.content)
+  )
+end
+
+
+"""
+Convert a toolResultMessage to OpenAI message format.
+"""
+function _toolResultMessageToOpenAI(msg::toolResultMessage)::Dict{String, Any}
+  return Dict(
+    "role" => "tool",
+    "tool_call_id" => msg.toolCallId,
+    "content" => _messageContentToBlocks(msg.content)
+  )
+end
+
+
+"""
+Convert a vector of messageContent to OpenAI content blocks.
+
+Each textContent becomes a text block, each imageContent becomes
+an image_url block.
+"""
+function _messageContentToBlocks(contents::Vector{messageContent})::Vector{Dict{String, Any}}
+  blocks = Vector{Dict{String, Any}}()
+
+  for c in contents
+    if c isa textContent
+      push!(blocks, Dict("type" => "text", "text" => c.text))
+    elseif c isa imageContent
+      push!(blocks, Dict(
+        "type" => "image_url",
+        "image_url" => Dict(
+          "url" => "data:$(c.mimeType);base64,$(c.data)"
+        )
+      ))
+    end
+  end
+
+  return blocks
 end