// Return the version string for the server.
version() -> string

// Sleep the given number of seconds (can be a float).
sleep(number)

// Log the given strings as information. Takes a variable number of strings.
log(...)

// Log the given strings as a warning. Takes a variable number of strings.
warn(...)

// Log the given strings as an error. Takes a variable number of strings.
err(...)

// Return the number of nanoseconds from 1970 ("Unix time")
unixnano() -> number

// Convert Markdown to HTML
markdown(string) -> string

// Sanitize HTML
sanhtml(string) -> string

// Return the directory where the REPL or script is running. If a filename (optional) is given, then the path to where the script is running, joined with a path separator and the given filename, is returned.
scriptdir([string]) -> string

// Read a glob, ie. "*.md" in the current script directory, or the given directory (optional). The contents of all found files are reeturned as a table.
readglob(string[, string]) -> table

// Return the directory where the server is running. If a filename (optional) is given, then the path to where the server is running, joined with a path separator and the given filename, is returned.
serverdir([string]) -> string

// Set the Content-Type for a page.
content(string)

// Return the requested HTTP method (GET, POST etc).
method() -> string

// Output text to the browser/client. Takes a variable number of strings.
print(...)

// Return the requested URL path.
urlpath() -> string

// Return the HTTP header in the request, for a given key, or an empty string.
header(string) -> string

// Set an HTTP header given a key and a value.
setheader(string, string)

// Return the HTTP headers, as a table.
headers() -> table

// Return the HTTP body in the request (will only read the body once, since it's streamed).
body() -> string

// Set a HTTP status code (like 200 or 404). Must be used before other functions that writes to the client!
status(number)

// Set a HTTP status code and output a message (optional).
error(number[, string])

// Serve a file that exists in the same directory as the script. Takes a filename.
serve(string)

// Serve a Pongo2 template file, with an optional table with template key/values.
serve2(string[, table)

// Return the rendered contents of a file that exists in the same directory as the script. Takes a filename.
render(string) -> string

// Return a table with keys and values as given in a posted form, or as given in the URL.
formdata() -> table

// Return a table with keys and values as given in the request URL, or in the given URL (`/some/page?x=7` makes the key `x` with the value `7` available).
urldata([string]) -> table

// Redirect to an absolute or relative URL. May take an HTTP status code that will be used when redirecting.
redirect(string[, number])

// Permanent redirect to an absolute or relative URL. Uses status code 302.
permanent_redirect(string)

// Send "Connection: close" as a header to the client, flush the body and also
// stop Lua functions from writing more data to the HTTP body.
close()

// Transmit what has been outputted so far, to the client.
flush()

// Output rendered Markdown to the browser/client. The given text is converted from Markdown to HTML. Takes a variable number of strings.
mprint(...)

// Output rendered Amber to the browser/client. The given text is converted from Amber to HTML. Takes a variable number of strings.
aprint(...)

// Output rendered GCSS to the browser/client. The given text is converted from GCSS to CSS. Takes a variable number of strings.
gprint(...)

// Output rendered HyperApp JSX to the browser/client. The given text is converted from JSX to JavaScript. Takes a variable number of strings.
hprint(...)

// Output rendered React JSX to the browser/client. The given text is converted from JSX to JavaScript. Takes a variable number of strings.
jprint(...)

// Output rendered HTML to the browser/client. The given text is converted from Pongo2 to HTML. The first argument is the Pongo2 template and the second argument is a table. The keys in the table can be referred to in the template.
poprint(string[, table])

// Output a simple HTML page with a message, title and theme.
// The title and theme are optional.
msgpage(string[, string][, string])

// Use, or create, a JSON document/file.
JFile(filename) -> userdata

// Takes a JSON path. Returns a string value, or an empty string.
jfile:getstring(string) -> string

// Takes a JSON path. Returns a JNode or nil.
jfile:getnode(string) -> userdata

// Takes a JSON path. Returns a value or nil.
jfile:get(string) -> value

// Takes a JSON path (optional) and JSON data to be added to the list.
// The JSON path must point to a list, if given, unless the JSON file is empty.
// "x" is the default JSON path. Returns true on success.
jfile:add([string, ]string) -> bool

// Take a JSON path and a string value. Changes the entry. Returns true on success.
jfile:set(string, string) -> bool

// Remove a key in a map. Takes a JSON path, returns true on success.
jfile:delkey(string) -> bool

// Convert a Lua table, where keys are strings and values are strings or numbers, to JSON.
// Takes an optional number of spaces to indent the JSON data.
// (Note that keys in JSON maps are always strings, ref. the JSON standard).
json(table[, number]) -> string

// Create a JSON document node.
JNode() -> userdata

// Add JSON data to a node. The first argument is an optional JSON path.
// The second argument is a JSON data string. Returns true on success.
// "x" is the default JSON path.
jnode:add([string, ]string) -> bool

// Given a JSON path, retrieves a JSON node.
jnode:get(string) -> userdata

// Given a JSON path, retrieves a JSON string.
jnode:getstring(string) -> string

// Given a JSON path and a JSON string, set the value.
jnode:set(string, string)

// Given a JSON path, remove a key from a map.
jnode:delkey(string) -> bool

// Return the JSON data, nicely formatted.
jnode:pretty() -> string

// Return the JSON data, as a compact string.
jnode:compact() -> string

// Sends JSON data to the given URL. Returns the HTTP status code as a string.
// The content type is set to "application/json; charset=utf-8".
// The second argument is an optional authentication token that is used for the
// Authorization header field.
jnode:POST(string[, string]) -> string

// Alias for jnode:POST
jnode:send(string[, string]) -> string

// Same as jnode:POST, but sends HTTP PUT instead.
jnode:PUT(string[, string]) -> string

// Fetches JSON over HTTP given an URL that starts with http or https.
// The JSON data is placed in the JNode. Returns the HTTP status code as a string.
jnode:GET(string) -> string

// Alias for jnode:GET
jnode:receive(string) -> string

// Convert from a simple Lua table to a JSON string
JSON(table) -> string

// Create a new HTTP Client object
HTTPClient() -> userdata

// Select Accept-Language (ie. "en-us")
hc:SetLanguage(string)

// Set the request timeout (in milliseconds)
hc:SetTimeout(number)

// Set a cookie (name and value)
hc:SetCookie(string, string)

// Set the user agent (ie. "curl")
hc:SetUserAgent(string)

// Perform a HTTP GET request. First comes the URL, then an optional table with
// URL parameters, then an optional table with HTTP headers.
hc:Get(string, [table], [table]) -> string

// Perform a HTTP POST request. It's the same arguments as for `Get`, except
// the fourth optional argument is the POST body.
hc:Post(string, [table], [table], [string]) -> string

// Like `Get`, except the first argument is the HTTP method (like "PUT")
hc:Do(string, string, [table], [table]) -> string

// Shorthand for HTTPClient():Get()
GET(string, [table], [table]) -> string

// Shorthand for HTTPClient():Post()
POST(string, [table], [table], [string]) -> string

// Shorthand for HTTPClient():Do()
DO(string, string, [table], [table]) -> string

// Connect to the local Ollama server and use either the `tinyllama` model, or the supplied model string (like ie. mixtral:latest).
// Also takes an optional host address.
OllamaClient([string], [string]) -> userdata

// Download the required model, if needed. This may take a while if the model is large.
oc:pull()

// Pass a prompt to Ollama and return the reproducible generated output. If no prompt is given, it will request a poem about Algernon.
// Can also take an optional model name, which will trigger a download if the model is missing.
oc:ask([string], [string]) -> string

// Pass a prompt to Ollama and return the generated output that will differ every time.
// Can also take an optional model name, which will trigger a download if the model is missing.
oc:creative([string], [string]) -> string

// Check if the given model name is downloaded and ready
oc:has(string)

// List all models that are downloaded and ready
oc:list()

// Get or set the currently active model name, but does not pull anything
oc:model([string])

// Get the size of the given model name as a human-friendly string
oc:size(string) -> string

// Get the size of the given model name, in bytes
oc:bytesize(string) -> number

// Given two prompts, return how similar they are.
// The first optional string is the algorithm for measuring the distance: cosine, euclidean, manhattan, chebyshev or hamming.
// Only the two first letters of the algorithm name are needed, so "co" or "ma" are also valid. The default is cosine.
// The second optional string is the model name.
oc:distance(string, string, [string], [string]) -> number

// Convenience function for the local Ollama server that takes an optional prompt and an optional model name.
// Generates a poem with the `tinyllama` model by default.
ollama([string], [string]) -> string

// Convenience function for Base64-encoding the given file
base64EncodeFile(string) -> string

// Describe the given base64-encoded image using Ollama (and the `llava-llama3` model, by default)
describeImage(string, [string]) -> string

// Given two embeddings (tables of floats, representing text or data), return how similar they are.
// The optional string is the algorithm for measuring the distance: cosine, euclidean, manhattan, chebyshev or hamming.
// Only the two first letters of the algorithm name are needed, so "co" or "ma" are also valid. The default is cosine.
embeddedDistance(table, table, [string]) -> number

// Load a plugin given the path to an executable. Returns true on success. Will return the plugin help text if called on the Lua prompt.
// Pass in true as the second argument to keep it running.
Plugin(string, [bool])

// Returns the Lua code as returned by the Lua.Code function in the plugin, given a plugin path. May return an empty string.
// Pass in true as the second argument to keep it running.
PluginCode(string, [bool]) -> string

// Takes a plugin path, function name and arguments. Returns an empty string if the function call fails, or the results as a JSON string if successful.
CallPlugin(string, string, ...) -> string

// Create or uses a code library object. Optionally takes a data structure name as the first parameter.
CodeLib([string]) -> userdata

// Given a namespace and Lua code, add the given code to the namespace. Returns true on success.
codelib:add(string, string) -> bool

// Given a namespace and Lua code, set the given code as the only code in the namespace. Returns true on success.
codelib:set(string, string) -> bool

// Given a namespace, return Lua code, or an empty string.
codelib:get(string) -> string

// Import (eval) code from the given namespace into the current Lua state. Returns true on success.
codelib:import(string) -> bool

// Completely clear the code library. Returns true on success.
codelib:clear() -> bool

// Creates a file upload object. Takes a form ID (from a POST request) as the first parameter.
// Takes an optional maximum upload size (in MiB) as the second parameter.
// Returns nil and an error string on failure, or userdata and an empty string on success.
UploadedFile(string[, number]) -> userdata, string

// Return the uploaded filename, as specified by the client
uploadedfile:filename() -> string

// Return the size of the data that has been received
uploadedfile:size() -> number

// Return the mime type of the uploaded file, as specified by the client
uploadedfile:mimetype() -> string

// Return the full textual content of the uploaded file
uploadedfile:content() -> string

// Save the uploaded data locally. Takes an optional filename. Returns true on success.
uploadedfile:save([string]) -> bool

// Save the uploaded data as the client-provided filename, in the specified directory.
// Takes a relative or absolute path. Returns true on success.
uploadedfile:savein(string)  -> bool

// Return the uploaded data as a base64-encoded string
uploadedfile:base64() -> string

// Return information about the file cache.
CacheInfo() -> string

// Clear the file cache.
ClearCache()

// Load a file into the cache, returns true on success.
preload(string) -> bool

// Get or create a database-backed Set (takes a name, returns a set object)
Set(string) -> userdata

// Add an element to the set
set:add(string)

// Remove an element from the set
set:del(string)

// Check if a set contains a value
// Returns true only if the value exists and there were no errors.
set:has(string) -> bool

// Get all members of the set
set:getall() -> table

// Remove the set itself. Returns true on success.
set:remove() -> bool

// Clear the set
set:clear() -> bool

// Get or create a database-backed List (takes a name, returns a list object)
List(string) -> userdata

// Add an element to the list
list:add(string)

// Get all members of the list
list:getall() -> table

// Get the last element of the list
// The returned value can be empty
list:getlast() -> string

// Get the N last elements of the list
list:getlastn(number) -> table

// Remove the list itself. Returns true on success.
list:remove() -> bool

// Clear the list. Returns true on success.
list:clear() -> bool

// Return all list elements (expected to be JSON strings) as a JSON list
list:json() -> string

// Get or create a database-backed HashMap (takes a name, returns a hash map object)
HashMap(string) -> userdata

// For a given element id (for instance a user id), set a key
// (for instance "password") and a value.
// Returns true on success.
hash:set(string, string, string) -> bool

// For a given element id (for instance a user id), and a key
// (for instance "password"), return a value.
// Returns a value only if they key was found and if there were no errors.
hash:get(string, string) -> string

// For a given element id (for instance a user id), and a key
// (for instance "password"), check if the key exists in the hash map.
// Returns true only if it exists and there were no errors.
hash:has(string, string) -> bool

// For a given element id (for instance a user id), check if it exists.
// Returns true only if it exists and there were no errors.
hash:exists(string) -> bool

// Get all keys of the hash map
hash:getall() -> table

// Remove a key for an entry in a hash map
// (for instance the email field for a user)
// Returns true on success
hash:delkey(string, string) -> bool

// Remove an element (for instance a user)
// Returns true on success
hash:del(string) -> bool

// Remove the hash map itself. Returns true on success.
hash:remove() -> bool

// Clear the hash map. Returns true on success.
hash:clear() -> bool

// Get or create a database-backed KeyValue collection (takes a name, returns a key/value object)
KeyValue(string) -> userdata

// Set a key and value. Returns true on success.
kv:set(string, string) -> bool

// Takes a key, returns a value.
// Returns an empty string if the function fails.
kv:get(string) -> string

// Takes a key, returns the value+1.
// Creates a key/value and returns "1" if it did not already exist.
// Returns an empty string if the function fails.
kv:inc(string) -> string

// Remove a key. Returns true on success.
kv:del(string) -> bool

// Remove the KeyValue itself. Returns true on success.
kv:remove() -> bool

// Clear the KeyValue. Returns true on success.
kv:clear() -> bool

// Query a PostgreSQL database with a SQL query and a connection string
PQ([string], [string]) -> table

// Query a MSSQL database with SQL, a connection string, and a parameter table
MSSQL([string], [string], [table]) -> table

// Check if the current user has "user" rights
UserRights() -> bool

// Check if the given username exists (does not look at the list of unconfirmed users)
HasUser(string) -> bool

// Check if the given username exists in the list of unconfirmed users
HasUnconfirmedUser(string) -> bool

// Get the value from the given boolean field
// Takes a username and field name
BooleanField(string, string) -> bool

// Save a value as a boolean field
// Takes a username, field name and boolean value
SetBooleanField(string, string, bool)

// Check if a given username is confirmed
IsConfirmed(string) -> bool

// Check if a given username is logged in
IsLoggedIn(string) -> bool

// Check if the current user has "admin rights"
AdminRights() -> bool

// Check if a given username is an admin
IsAdmin(string) -> bool

// Get the username stored in a cookie, or an empty string
UsernameCookie() -> string

// Store the username in a cookie, returns true on success
SetUsernameCookie(string) -> bool

// Clear the login cookie
ClearCookie()

// Get a table containing all usernames
AllUsernames() -> table

// Get the email for a given username, or an empty string
Email(string) -> string

// Get the password hash for a given username, or an empty string
PasswordHash(string) -> string

// Get all unconfirmed usernames
AllUnconfirmedUsernames() -> table

// Get the existing confirmation code for a given user,
// or an empty string. Takes a username.
ConfirmationCode(string) -> string

// Add a user to the list of unconfirmed users
// Takes a username and a confirmation code
// Remember to also add a user, when registering new users.
AddUnconfirmed(string, string)

// Remove a user from the list of unconfirmed users
// Takes a username
RemoveUnconfirmed(string)

// Mark a user as confirmed
// Takes a username
MarkConfirmed(string)

// Removes a user
// Takes a username
RemoveUser(string)

// Make a user an admin
// Takes a username
SetAdminStatus(string)

// Make an admin user a regular user
// Takes a username
RemoveAdminStatus(string)

// Add a user
// Takes a username, password and email
AddUser(string, string, string)

// Set a user as logged in on the server (not cookie)
// Takes a username
SetLoggedIn(string)

// Set a user as logged out on the server (not cookie)
// Takes a username
SetLoggedOut(string)

// Log in a user, both on the server and with a cookie
// Takes a username
Login(string)

// Log out a user, on the server (which is enough)
// Takes a username
Logout(string)

// Get the current username, from the cookie
Username() -> string

// Get the current cookie timeout
// Takes a username
CookieTimeout(string) -> number

// Set the current cookie timeout
// Takes a timeout number, measured in seconds
SetCookieTimeout(number)

// Get the current server-wide cookie secret. This is used when setting
// and getting browser cookies when users log in.
CookieSecret() -> string

// Set the current server-side cookie secret. This is used when setting
// and getting browser cookies when users log in. Using the same secret
// makes browser cookies usable across server restarts.
SetCookieSecret(string)

// Get the current password hashing algorithm (bcrypt, bcrypt+ or sha256)
PasswordAlgo() -> string

// Set the current password hashing algorithm (bcrypt, bcrypt+ or sha256)
// ‘bcrypt+‘ accepts bcrypt or sha256 for old passwords, but will only use
// bcrypt for new passwords.
SetPasswordAlgo(string)

// Hash the password
// Takes a username and password (username can be used for salting sha256)
HashPassword(string, string) -> string

// Change the password for a user, given a username and a new password
SetPassword(string, string)

// Check if a given username and password is correct
// Takes a username and password
CorrectPassword(string, string) -> bool

// Checks if a confirmation code is already in use
// Takes a confirmation code
AlreadyHasConfirmationCode(string) -> bool

// Find a username based on a given confirmation code,
// or returns an empty string. Takes a confirmation code
FindUserByConfirmationCode(string) -> string

// Mark a user as confirmed
// Takes a username
Confirm(string)

// Mark a user as confirmed, returns true on success
// Takes a confirmation code
ConfirmUserByConfirmationCode(string) -> bool

// Set the minimum confirmation code length
// Takes the minimum number of characters
SetMinimumConfirmationCodeLength(number)

// Generates a unique confirmation code, or an empty string
GenerateUniqueConfirmationCode() -> string

// Set the default address for the server on the form [host][:port].
// May be useful in Algernon application bundles (.alg or .zip files).
SetAddr(string)

// Reset the URL prefixes and make everything *public*.
ClearPermissions()

// Add an URL prefix that will have *admin* rights.
AddAdminPrefix(string)

// Add a reverse proxy given a path prefix and an endpoint URL
// For example: "/api" and "http://localhost:8080"
AddReverseProxy(string, string)

// Add an URL prefix that will have *user* rights.
AddUserPrefix(string)

// Provide a lua function that will be used as the permission denied handler.
DenyHandler(function)

// Return a string with various server information.
ServerInfo() -> string

// Direct the logging to the given filename. If the filename is an empty
// string, direct logging to stderr. Returns true on success.
LogTo(string) -> bool

// Returns the version string for the server.
version() -> string

// Logs the given strings as INFO. Takes a variable number of strings.
log(...)

// Logs the given strings as WARN. Takes a variable number of strings.
warn(...)

// Logs the given string as ERROR. Takes a variable number of strings.
err(...)

// Provide a lua function that will be run once, when the server is ready to start serving.
OnReady(function)

// Use a Lua file for setting up HTTP handlers instead of using the directory structure.
ServerFile(string) -> bool

// Serve files from this directory.
ServerDir(string) -> bool

// Get the cookie secret from the server configuration.
CookieSecret() -> string

// Set the cookie secret that will be used when setting and getting browser cookies.
SetCookieSecret(string)

// Given an URL path prefix (like "/") and a Lua function, set up an HTTP handler.
// The given Lua function should take no arguments, but can use all the Lua functions for handling requests, like `content` and `print`.
handle(string, function)

// Given an URL prefix (like "/") and a directory, serve the files and directories.
servedir(string, string)

// Pretty print. Outputs the values in, or a description of, the given Lua value(s).
pprint(...)

// Takes a Python filename, executes the script with the `python` binary in the Path.
// Returns the output as a Lua table, where each line is an entry.
py(string) -> table

// Takes one or more system commands (possibly separated by `;`) and runs them.
// Returns the output lines as a table.
run(string) -> table

// Lists the keys and values of a Lua table. Returns a string.
// Lists the contents of the global namespace `_G` if no arguments are given.
dir([table]) -> string