WIP OpenAI Lua API wrapper

website/Library/Lua API/OpenAI.md

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+#meta
+
+# Configuration
+Create a [[SECRETS]] page in your space, with a YAML block:
+
+```yaml
+OPENAI_API_KEY: yourapikeyhere
+```
+
+# Implementation
+```space-lua
+openai = {}
+
+-- Initialize OpenAI, optionally OPENAI_API_KEY from your SECRETS page if not supplied directly
+function openai.init(openaiApiKey)
+  if openai.client then
+    -- Already initialized
+    return
+  end
+  if not openaiApiKey then
+    -- Read SECRETS
+    local secretsPage = space.readPage("SECRETS")
+    -- Find the line with the pattern OPENAI_API_KEY: <key> and extract the key
+    openaiApiKey = string.match(secretsPage, "OPENAI_API_KEY: (%S+)")
+  end
+  if not openaiApiKey then
+    error("No OpenAI API key supplied")
+  end
+  
+  local openai_lib = js.import("https://esm.sh/openai")
+  openai.client = js.new(openai_lib.OpenAI, {
+      apiKey = openaiApiKey,
+      dangerouslyAllowBrowser = true
+  })
+end
+
+function openai.ensure_inited()
+  if not openai.client then
+    error("OpenAI not yet initialized")
+  end
+end
+
+function openai.chat(message)
+  openai.ensure_inited()
+  local r = openai.client.chat.completions.create({
+    model = "gpt-4o-mini",
+    messages = {
+        { role = "user", content = message },
+    },
+  })
+  return r.choices[1].message.content
+end
+
+
+function openai.stream_chat(message)
+  openai.ensure_inited()
+  local r = openai.client.chat.completions.create({
+    model = "gpt-4o-mini",
+    messages = {
+        { role = "user", content = message },
+    },
+    stream = true,
+  })
+  local iterator = js.each_iterable(r)
+  return function()
+    local el = iterator()
+    if el then
+      return el.choices[1].delta.content
+    end
+  end
+end
+
+```