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use crate::client::{ImageUrl, MessageContent, MessageContentPart, ModelCapabilities};
use crate::utils::sha256sum;
use anyhow::{bail, Context, Result};
use base64::{self, engine::general_purpose::STANDARD, Engine};
use fancy_regex::Regex;
use lazy_static::lazy_static;
use mime_guess::from_path;
use std::{
collections::HashMap,
fs::{self, File},
io::Read,
path::{Path, PathBuf},
};
const IMAGE_EXTS: [&str; 5] = ["png", "jpeg", "jpg", "webp", "gif"];
lazy_static! {
static ref URL_RE: Regex = Regex::new(r"^[A-Za-z0-9_-]{2,}:/").unwrap();
}
#[derive(Debug, Clone)]
pub struct Input {
text: String,
medias: Vec<String>,
data_urls: HashMap<String, String>,
}
impl Input {
pub fn from_str(text: &str) -> Self {
Self {
text: text.to_string(),
medias: Default::default(),
data_urls: Default::default(),
}
}
pub fn new(text: &str, files: Vec<String>) -> Result<Self> {
let mut texts = vec![text.to_string()];
let mut medias = vec![];
let mut data_urls = HashMap::new();
for file_item in files.into_iter() {
match resolve_path(&file_item) {
Some(file_path) => {
let file_path = fs::canonicalize(file_path)
.with_context(|| format!("Unable to use file '{file_item}"))?;
if is_image_ext(&file_path) {
let data_url = read_media_to_data_url(&file_path)?;
data_urls.insert(sha256sum(&data_url), file_path.display().to_string());
medias.push(data_url)
} else {
let mut text = String::new();
let mut file = File::open(&file_path)
.with_context(|| format!("Unable to open file '{file_item}'"))?;
file.read_to_string(&mut text)
.with_context(|| format!("Unable to read file '{file_item}'"))?;
texts.push(text);
}
}
None => {
if is_image_ext(Path::new(&file_item)) {
medias.push(file_item)
} else {
bail!("Unable to use file '{file_item}");
}
}
}
}
Ok(Self {
text: texts.join("\n"),
medias,
data_urls,
})
}
pub fn data_urls(&self) -> HashMap<String, String> {
self.data_urls.clone()
}
pub fn render(&self) -> String {
if self.medias.is_empty() {
return self.text.clone();
}
let text = if self.text.is_empty() {
self.text.to_string()
} else {
format!(" -- {}", self.text)
};
let files: Vec<String> = self
.medias
.iter()
.cloned()
.map(|url| resolve_data_url(&self.data_urls, url))
.collect();
format!(".file {}{}", files.join(" "), text)
}
pub fn to_message_content(&self) -> MessageContent {
if self.medias.is_empty() {
MessageContent::Text(self.text.clone())
} else {
let mut list: Vec<MessageContentPart> = self
.medias
.iter()
.cloned()
.map(|url| MessageContentPart::ImageUrl {
image_url: ImageUrl { url },
})
.collect();
if !self.text.is_empty() {
list.insert(
0,
MessageContentPart::Text {
text: self.text.clone(),
},
);
}
MessageContent::Array(list)
}
}
pub fn required_capabilities(&self) -> ModelCapabilities {
if !self.medias.is_empty() {
ModelCapabilities::Vision
} else {
ModelCapabilities::Text
}
}
}
pub fn resolve_data_url(data_urls: &HashMap<String, String>, data_url: String) -> String {
if data_url.starts_with("data:") {
let hash = sha256sum(&data_url);
if let Some(path) = data_urls.get(&hash) {
return path.to_string();
}
data_url
} else {
data_url
}
}
fn resolve_path(file: &str) -> Option<PathBuf> {
if let Ok(true) = URL_RE.is_match(file) {
return None;
}
let path = if let (Some(file), Some(home)) = (file.strip_prefix('~'), dirs::home_dir()) {
home.join(file)
} else {
std::env::current_dir().ok()?.join(file)
};
Some(path)
}
fn is_image_ext(path: &Path) -> bool {
path.extension()
.map(|v| {
IMAGE_EXTS
.iter()
.any(|ext| *ext == v.to_string_lossy().to_lowercase())
})
.unwrap_or_default()
}
fn read_media_to_data_url<P: AsRef<Path>>(image_path: P) -> Result<String> {
let mime_type = from_path(&image_path).first_or_octet_stream().to_string();
let mut file = File::open(image_path)?;
let mut buffer = Vec::new();
file.read_to_end(&mut buffer)?;
let encoded_image = STANDARD.encode(buffer);
let data_url = format!("data:{};base64,{}", mime_type, encoded_image);
Ok(data_url)
}
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