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OpenAI-based short link suggestions

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This commit is contained in:
Ian Gulliver
2024-11-27 22:29:03 -06:00
parent 8b040265cd
commit 5d7ace205a
3 changed files with 211 additions and 28 deletions
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54
main.go
View File

@@ -7,6 +7,7 @@ import (
"log"
"net/http"
"os"
"strings"
"time"
_ "github.com/lib/pq"
@@ -18,12 +19,17 @@ type ShortLinks struct {
mux *http.ServeMux
db *sql.DB
r *rand.Rand
oai *oaiClient
}
type response struct {
type setResponse struct {
Short string `json:"short"`
}
type suggestResponse struct {
Shorts []string `json:"shorts"`
}
func NewShortLinks(db *sql.DB) (*ShortLinks, error) {
tmpl := template.New("index.html")
@@ -32,16 +38,23 @@ func NewShortLinks(db *sql.DB) (*ShortLinks, error) {
return nil, fmt.Errorf("static/index.html: %w", err)
}
oai, err := newOAIClientFromEnv()
if err != nil {
return nil, fmt.Errorf("newOAIClientFromEnv: %w", err)
}
sl := &ShortLinks{
tmpl: tmpl,
mux: http.NewServeMux(),
db: db,
r: rand.New(rand.NewSource(uint64(time.Now().UnixNano()))),
oai: oai,
}
sl.mux.HandleFunc("GET /{$}", sl.serveRoot)
sl.mux.HandleFunc("GET /{short}", sl.serveShort)
sl.mux.HandleFunc("POST /{$}", sl.serveSet)
sl.mux.HandleFunc("QUERY /{$}", sl.serveSuggest)
return sl, nil
}
@@ -117,11 +130,48 @@ DO UPDATE SET long = $2;
return
}
sendJSON(w, response{
sendJSON(w, setResponse{
Short: short,
})
}
func (sl *ShortLinks) serveSuggest(w http.ResponseWriter, r *http.Request) {
err := r.ParseForm()
if err != nil {
sendError(w, http.StatusBadRequest, "Parse form: %s", err)
return
}
log.Printf("%s %s %s", r.RemoteAddr, r.URL.Path, r.Form.Encode())
if !r.Form.Has("short") {
sendError(w, http.StatusBadRequest, "short= param required")
return
}
user := strings.Join(r.Form["short"], "\n")
comp, err := sl.oai.completeChat(
"You are an assistant helping a user choose useful short names for a URL shortener. The request contains a list recents names chosen by the user, separated by newlines, with the most recent names first. Respond with only a list of possible suggestions for additional short names, separated by newlines. Suggestions may include conceptual variations of the names provided, plural/singular variations, hyphenation variations, or other variations that are likely to be useful. Your bar for suggestions should be relatively high; responding with a short list of high quality suggestions is preferred.",
user,
)
if err != nil {
sendError(w, http.StatusInternalServerError, "oai.completeChat: %s", err)
return
}
shorts := []string{}
for _, short := range strings.Split(comp, "\n") {
if short != "" {
shorts = append(shorts, strings.TrimSpace(short))
}
}
sendJSON(w, suggestResponse{
Shorts: shorts,
})
}
func (sl *ShortLinks) genShort() (string, error) {
for chars := 3; chars <= 10; chars++ {
b := make([]byte, chars)

94
openai.go Normal file
View File

@@ -0,0 +1,94 @@
package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"os"
)
type oaiClient struct {
c *http.Client
apiKey string
}
type oaiRequest struct {
Model string `json:"model"`
Messages []oaiMessage `json:"messages"`
}
type oaiMessage struct {
Role string `json:"role"`
Content string `json:"content"`
}
type oaiResponse struct {
Choices []oaiChoice `json:"choices"`
}
type oaiChoice struct {
Message oaiMessage `json:"message"`
}
func newOAIClient(apiKey string) *oaiClient {
return &oaiClient{
c: &http.Client{},
apiKey: apiKey,
}
}
func newOAIClientFromEnv() (*oaiClient, error) {
apiKey := os.Getenv("OPENAI_API_KEY")
if apiKey == "" {
return nil, fmt.Errorf("OPENAI_API_KEY is not set")
}
return newOAIClient(apiKey), nil
}
func (oai *oaiClient) completeChat(system, user string) (string, error) {
buf := &bytes.Buffer{}
err := json.NewEncoder(buf).Encode(&oaiRequest{
Model: "gpt-4o",
Messages: []oaiMessage{
{Role: "system", Content: system},
{Role: "user", Content: user},
},
})
if err != nil {
return "", err
}
req, err := http.NewRequest("POST", "https://api.openai.com/v1/chat/completions", buf)
if err != nil {
return "", err
}
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", oai.apiKey))
req.Header.Set("Content-Type", "application/json")
resp, err := oai.c.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
body, _ := io.ReadAll(resp.Body)
return "", fmt.Errorf("%s", string(body))
}
dec := json.NewDecoder(resp.Body)
var res oaiResponse
err = dec.Decode(&res)
if err != nil {
return "", err
}
return res.Choices[0].Message.Content, nil
}

91
static/index.html
View File

@@ -76,7 +76,7 @@ function error(err1, err2) {
document.getElementById('err').show();
}
async function set() {
async function setFromInputs() {
const short = document.getElementById('short').value;
const long = document.getElementById('long').value;
@@ -88,6 +88,10 @@ async function set() {
document.getElementById('short-icon').setAttribute('name', 'check-square-fill');
document.getElementById('long-icon').setAttribute('name', 'check-square-fill');
set(short, long);
}
function set(short, long) {
if (short != '') {
setShortItem(short, 'check-square-fill');
}
@@ -96,23 +100,42 @@ async function set() {
params.set('short', short);
params.set('long', long);
const resp = await fetch(`./?${params.toString()}`, {
fetch(`./?${params.toString()}`, {
method: 'POST',
}).then(async (resp) => {
if (resp.status !== 200) {
error('Failed to set', (await resp.json()).message);
return;
}
const data = await resp.json();
const newShort = data.short;
setShortItem(newShort, 'check-square');
if (document.getElementById('short').value == short && document.getElementById('long').value == long) {
document.getElementById('short-icon').setAttribute('name', 'check-square');
document.getElementById('long-icon').setAttribute('name', 'check-square');
await navigator.clipboard.writeText(`${window.location.origin}/${newShort}`);
}
});
if (resp.status !== 200) {
error('Failed to set', (await resp.json()).message);
return;
const suggestParams = new URLSearchParams();
for (const elem of document.getElementById('tree').children) {
const icon = elem.getElementsByTagName('sl-icon')[0];
if (icon.getAttribute('name') == 'check-square-fill' ||
icon.getAttribute('name') == 'check-square') {
suggestParams.append('short', elem.textContent);
}
}
const newShort = (await resp.json()).short;
if (document.getElementById('short').value == short && document.getElementById('long').value == long) {
document.getElementById('short-icon').setAttribute('name', 'check-square');
document.getElementById('long-icon').setAttribute('name', 'check-square');
setShortItem(newShort, 'check-square');
await navigator.clipboard.writeText(`${window.location.origin}/${newShort}`);
}
fetch(`./?${suggestParams.toString()}`, {
method: 'QUERY',
}).then(async (resp) => {
for (const short of (await resp.json()).shorts) {
appendShortItem(short, long);
}
});
}
function setShortItem(short, icon) {
@@ -125,18 +148,34 @@ function setShortItem(short, icon) {
}
const item = document.createElement('sl-tree-item');
const url = `${window.location.origin}/${short}`;
item.appendChild(document.createElement('sl-icon')).setAttribute('name', icon);
item.appendChild(document.createTextNode(short));
const copy = document.createElement('sl-copy-button');
copy.setAttribute('value', url);
copy.style.color = 'var(--sl-color-neutral-300)';
item.appendChild(copy);
item.addEventListener('click', () => {
navigator.clipboard.writeText(`${window.location.origin}/${short}`);
});
tree.insertBefore(item, tree.firstChild);
}
function appendShortItem(short, long) {
const tree = document.getElementById('tree');
for (const item of tree.children) {
if (item.textContent == short) {
return;
}
}
const item = document.createElement('sl-tree-item');
item.appendChild(document.createElement('sl-icon')).setAttribute('name', 'square');
item.appendChild(document.createTextNode(short));
item.addEventListener('click', () => {
set(short, long);
});
tree.appendChild(item);
}
document.addEventListener('DOMContentLoaded', async () => {
await Promise.all([
customElements.whenDefined('sl-input'),
@@ -155,18 +194,18 @@ document.addEventListener('DOMContentLoaded', async () => {
document.getElementById('short').addEventListener('keydown', (e) => {
if (e.key === 'Enter') {
set();
setFromInputs();
}
});
document.getElementById('short').addEventListener('paste', () => {
if (document.getElementById('long').value != '') {
setTimeout(() => set(), 0);
setTimeout(() => setFromInputs(), 0);
}
});
document.getElementById('short-icon').addEventListener('click', () => {
set();
setFromInputs();
});
@@ -177,7 +216,7 @@ document.addEventListener('DOMContentLoaded', async () => {
document.getElementById('long').addEventListener('keydown', (e) => {
if (e.key === 'Enter') {
set();
setFromInputs();
} else {
document.getElementById('tree').replaceChildren();
}
@@ -185,17 +224,17 @@ document.addEventListener('DOMContentLoaded', async () => {
document.getElementById('long').addEventListener('paste', () => {
if (document.getElementById('short').value != '') {
setTimeout(() => set(), 0);
setTimeout(() => setFromInputs(), 0);
}
});
document.getElementById('long-icon').addEventListener('click', () => {
set();
setFromInputs();
});
document.getElementById('set').addEventListener('click', () => {
set();
setFromInputs();
});