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<script lang="ts">
import type { SystemPromptVariable } from "@dispatch/transport-contract";
import { tick, untrack } from "svelte";
import {
buildTag,
groupVariables,
insertTag,
isDynamicVariable,
type LoadSystemPrompt,
type LoadSystemPromptVariables,
type SaveSystemPrompt,
} from "../logic/view-model";
let {
loadPrompt,
savePrompt,
loadVariables,
onClose,
}: {
loadPrompt: LoadSystemPrompt;
savePrompt: SaveSystemPrompt;
loadVariables: LoadSystemPromptVariables;
onClose: () => void;
} = $props();
let value = $state("");
let loadedTemplate = $state("");
let loading = $state(false);
let saving = $state(false);
let error = $state<string | null>(null);
let justSaved = $state(false);
let variables = $state<readonly SystemPromptVariable[]>([]);
let filePath = $state("");
let textarea: HTMLTextAreaElement | null = null;
const groups = $derived(groupVariables(variables));
const hasChanges = $derived(value !== loadedTemplate);
async function load() {
untrack(() => {
loading = true;
error = null;
});
const [templateResult, variablesResult] = await Promise.all([loadPrompt(), loadVariables()]);
loading = false;
if (!templateResult.ok || !variablesResult.ok) {
const parts: string[] = [];
if (!templateResult.ok) parts.push(templateResult.error);
if (!variablesResult.ok) parts.push(variablesResult.error);
error = parts.join("; ");
return;
}
value = templateResult.template;
loadedTemplate = templateResult.template;
variables = variablesResult.variables;
}
async function save() {
if (saving || loading) return;
saving = true;
error = null;
justSaved = false;
const result = await savePrompt(value);
saving = false;
if (!result.ok) {
error = result.error;
return;
}
loadedTemplate = result.template;
value = result.template;
justSaved = true;
}
function reset() {
value = loadedTemplate;
error = null;
justSaved = false;
}
async function insertTagAtCursor(tag: string) {
if (textarea === null) return;
const start = textarea.selectionStart;
const end = textarea.selectionEnd;
const insertion = insertTag(value, tag, start, end);
value = insertion.template;
await tick();
textarea.focus();
textarea.setSelectionRange(insertion.cursor, insertion.cursor);
}
async function insertFileVariable(type: string) {
const path = filePath.trim();
if (path.length === 0) return;
await insertTagAtCursor(buildTag(type, path));
filePath = "";
}
function onKeydown(e: KeyboardEvent) {
if (e.key === "Escape") onClose();
}
// Load on mount once.
$effect(() => {
void load();
});
</script>
<svelte:window onkeydown={onKeydown} />
<!-- svelte-ignore a11y_no_static_element_interactions -->
<div
class="fixed inset-0 z-50 flex items-center justify-center bg-black/50 p-4"
role="dialog"
aria-modal="true"
aria-label="System prompt builder"
tabindex="-1"
onclick={onClose}
onkeydown={onKeydown}
>
<!-- svelte-ignore a11y_click_events_have_key_events, a11y_no_static_element_interactions -->
<div
class="flex h-[85vh] w-full max-w-6xl flex-col overflow-hidden rounded-box bg-base-100 shadow-2xl"
onclick={(e) => e.stopPropagation()}
>
<!-- Header -->
<div class="flex shrink-0 items-center justify-between border-b border-base-300 px-4 py-3">
<div class="flex items-center gap-2">
<h2 class="text-sm font-semibold">System Prompt</h2>
{#if loading}
<span class="loading loading-spinner loading-xs"></span>
{/if}
</div>
<button
type="button"
class="btn btn-ghost btn-sm btn-square"
onclick={onClose}
aria-label="Close system prompt builder"
>
✕
</button>
</div>
<!-- Body: half editor / half variables -->
<div class="flex min-h-0 flex-1">
<!-- Left: template editor -->
<div class="flex w-1/2 min-w-0 flex-col gap-2 border-r border-base-300 p-4">
<textarea
bind:this={textarea}
bind:value
class="textarea textarea-bordered min-h-0 w-full flex-1 resize-none font-mono text-xs"
placeholder={loading
? "Loading template..."
: "Edit the global system prompt template..."}
disabled={loading}
aria-label="System prompt template"></textarea>
<div class="flex shrink-0 items-center gap-2">
<button
type="button"
class="btn btn-primary btn-sm"
disabled={loading || saving || !hasChanges}
onclick={save}
>
{#if saving}
<span class="loading loading-spinner loading-xs"></span>
{:else}
Save
{/if}
</button>
<button
type="button"
class="btn btn-ghost btn-sm"
disabled={loading || !hasChanges}
onclick={reset}
>
Reset
</button>
{#if justSaved && !hasChanges}
<span class="text-xs text-success">Saved.</span>
{:else if hasChanges}
<span class="text-xs opacity-60">Unsaved changes</span>
{/if}
</div>
{#if error}
<p class="shrink-0 text-xs text-error">{error}</p>
{/if}
</div>
<!-- Right: variable palette -->
<div class="flex w-1/2 min-w-0 flex-col overflow-y-auto p-4">
<h3 class="mb-2 shrink-0 text-xs font-semibold uppercase opacity-60">Variables</h3>
{#if groups.length === 0 && !loading}
<p class="text-xs opacity-60">No variables available.</p>
{/if}
<div class="flex flex-col gap-3">
{#each groups as group (group.type)}
<div class="rounded-box bg-base-200 p-3">
<span class="text-xs font-semibold uppercase opacity-70">{group.type}</span>
<div class="mt-2 flex flex-wrap gap-1">
{#each group.variables as variable (variable.type + variable.name)}
{#if isDynamicVariable(variable)}
<div class="flex items-center gap-1">
<input
type="text"
class="input input-bordered input-xs w-32 font-mono"
bind:value={filePath}
placeholder={variable.name}
onkeydown={(e) => {
if (e.key === "Enter") void insertFileVariable(variable.type);
}}
/>
<button
type="button"
class="btn btn-xs"
onclick={() => void insertFileVariable(variable.type)}
>
Insert
</button>
</div>
{:else}
<button
type="button"
class="btn btn-xs"
title={variable.description}
onclick={() => void insertTagAtCursor(buildTag(variable.type, variable.name))}
>
{variable.name}
</button>
{/if}
{/each}
</div>
</div>
{/each}
</div>
</div>
</div>
</div>
</div>
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