feat(FIM): legacy completions api supported for FIM

 - refactor chat api name for better distinguish with legacy completions api

gradle.properties

@@ -1,5 +1,5 @@
 #Gradle
-org.gradle.jvmargs=-Xmx2048M -Dfile.encoding=UTF-8 -Dkotlin.daemon.jvm.options\="-Xmx2048M"
+org.gradle.jvmargs=-Xmx4048M -Dfile.encoding=UTF-8 -Dkotlin.daemon.jvm.options\="-Xmx4048M"
 org.gradle.caching=true
 org.gradle.configuration-cache=true
 #Kotlin

openai-client/openai-client-core/src/commonMain/kotlin/com/tddworks/openai/api/OpenAI.kt

@@ -3,11 +3,14 @@ package com.tddworks.openai.api
 import com.tddworks.di.getInstance
 import com.tddworks.openai.api.chat.api.Chat
 import com.tddworks.openai.api.images.api.Images
+import com.tddworks.openai.api.legacy.completions.api.Completion
+import com.tddworks.openai.api.legacy.completions.api.Completions
 
-interface OpenAI : Chat, Images {
+interface OpenAI : Chat, Images, Completions {
     companion object {
         const val BASE_URL = "api.openai.com"
     }
 }
 
-class OpenAIApi : OpenAI, Chat by getInstance(), Images by getInstance()
+class OpenAIApi : OpenAI, Chat by getInstance(), Images by getInstance(),
+    Completions by getInstance()

openai-client/openai-client-core/src/commonMain/kotlin/com/tddworks/openai/api/chat/api/Chat.kt

@@ -15,15 +15,15 @@ interface Chat {
      * @param request The request to create a chat completion.
      * @return The chat completion.
      */
-    suspend fun completions(request: ChatCompletionRequest): ChatCompletion
+    suspend fun chatCompletions(request: ChatCompletionRequest): ChatCompletion
 
 
     /**
      * Stream a chat completion.
      * @param request The request to stream a chat completion.
      * @return The chat completion chunks as a stream
      */
-    fun streamCompletions(request: ChatCompletionRequest): Flow<ChatCompletionChunk>
+    fun streamChatCompletions(request: ChatCompletionRequest): Flow<ChatCompletionChunk>
 
     companion object {
         const val CHAT_COMPLETIONS_PATH = "/v1/chat/completions"

openai-client/openai-client-core/src/commonMain/kotlin/com/tddworks/openai/api/chat/api/ChatCompletionRequest.kt

@@ -175,6 +175,8 @@ data class ChatCompletionRequest(
      */
     @SerialName("top_p")
     val topP: Double? = null,
+    val v: String? = null,
+    val stream: Boolean? = null,
 
     /**
      * array
@@ -251,7 +253,7 @@ data class ChatCompletionRequest(
     @SerialName("user")
     val user: String? = null,
 
-    ) : StreamableRequest {
+    ) {
 
     companion object {
         fun chatCompletionRequest(

openai-client/openai-client-core/src/commonMain/kotlin/com/tddworks/openai/api/chat/api/Model.kt

@@ -19,6 +19,12 @@ value class Model(val value: String) {
          */
         val GPT_3_5_TURBO_0125 = Model("gpt-3.5-turbo-0125")
 
+        /**
+         * Similar capabilities as GPT-3 era models. Compatible with legacy Completions endpoint and not Chat Completions.
+         * 4,096 tokens	Up to Sep 2021
+         */
+        val GPT_3_5_TURBO_INSTRUCT = Model("gpt-3.5-turbo-instruct")
+
         /**
          *
          * GPT-4 Turbo with Vision

openai-client/openai-client-core/src/commonMain/kotlin/com/tddworks/openai/api/chat/internal/DefaultChatApi.kt

@@ -22,7 +22,7 @@ import kotlinx.serialization.ExperimentalSerializationApi
 class DefaultChatApi(
     private val requester: HttpRequester,
 ) : Chat {
-    override suspend fun completions(request: ChatCompletionRequest): ChatCompletion {
+    override suspend fun chatCompletions(request: ChatCompletionRequest): ChatCompletion {
         return requester.performRequest<ChatCompletion> {
             method = HttpMethod.Post
             url(path = CHAT_COMPLETIONS_PATH)
@@ -31,11 +31,11 @@ class DefaultChatApi(
         }
     }
 
-    override fun streamCompletions(request: ChatCompletionRequest): Flow<ChatCompletionChunk> {
+    override fun streamChatCompletions(request: ChatCompletionRequest): Flow<ChatCompletionChunk> {
         return requester.streamRequest<ChatCompletionChunk> {
             method = HttpMethod.Post
             url(path = CHAT_COMPLETIONS_PATH)
-            setBody(request.asStreamRequest())
+            setBody(request.copy(stream = true))
             contentType(ContentType.Application.Json)
             accept(ContentType.Text.EventStream)
             headers {

openai-client/openai-client-core/src/commonMain/kotlin/com/tddworks/openai/api/legacy/completions/api/Completion.kt

@@ -0,0 +1,50 @@
+package com.tddworks.openai.api.legacy.completions.api
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class Completion(
+    val id: String,
+    val choices: List<CompletionChoice>,
+    val created: Int,
+    val model: String,
+    @SerialName("system_fingerprint")
+    val systemFingerprint: String?,
+    val `object`: String?,
+    val usage: Usage?
+) {
+    companion object {
+        fun dummy() = Completion(
+            id = "id",
+            choices = emptyList(),
+            created = 0,
+            model = "model",
+            systemFingerprint = "systemFingerprint",
+            `object` = "object",
+            usage = Usage()
+        )
+    }
+}
+
+@Serializable
+data class CompletionChoice(
+    @SerialName("text")
+    val text: String,
+    @SerialName("index")
+    val index: Int,
+    @SerialName("logprobs")
+    val logprobs: Map<String, String>?,
+    @SerialName("finish_reason")
+    val finishReason: String
+)
+
+@Serializable
+data class Usage(
+    @SerialName("prompt_tokens")
+    val promptTokens: Int? = null,
+    @SerialName("completion_tokens")
+    val completionTokens: Int? = null,
+    @SerialName("total_tokens")
+    val totalTokens: Int? = null,
+)