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import type { SyncableParameter, ParameterRecord, ParameterInfo, ParameterValue } from '$lib/types';
import { SyncableParameterType, ParameterSource } from '$lib/enums';
/**
* Mapping of webui setting keys to server parameter keys.
* Only parameters listed here can be synced from the server `/props` endpoint.
* Each entry defines the webui key, corresponding server key, value type,
* and whether sync is enabled.
*/
export const SYNCABLE_PARAMETERS: SyncableParameter[] = [
{
key: 'temperature',
serverKey: 'temperature',
type: SyncableParameterType.NUMBER,
canSync: true
},
{ key: 'top_k', serverKey: 'top_k', type: SyncableParameterType.NUMBER, canSync: true },
{ key: 'top_p', serverKey: 'top_p', type: SyncableParameterType.NUMBER, canSync: true },
{ key: 'min_p', serverKey: 'min_p', type: SyncableParameterType.NUMBER, canSync: true },
{
key: 'dynatemp_range',
serverKey: 'dynatemp_range',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'dynatemp_exponent',
serverKey: 'dynatemp_exponent',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'xtc_probability',
serverKey: 'xtc_probability',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'xtc_threshold',
serverKey: 'xtc_threshold',
type: SyncableParameterType.NUMBER,
canSync: true
},
{ key: 'typ_p', serverKey: 'typ_p', type: SyncableParameterType.NUMBER, canSync: true },
{
key: 'repeat_last_n',
serverKey: 'repeat_last_n',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'repeat_penalty',
serverKey: 'repeat_penalty',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'presence_penalty',
serverKey: 'presence_penalty',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'frequency_penalty',
serverKey: 'frequency_penalty',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'dry_multiplier',
serverKey: 'dry_multiplier',
type: SyncableParameterType.NUMBER,
canSync: true
},
{ key: 'dry_base', serverKey: 'dry_base', type: SyncableParameterType.NUMBER, canSync: true },
{
key: 'dry_allowed_length',
serverKey: 'dry_allowed_length',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'dry_penalty_last_n',
serverKey: 'dry_penalty_last_n',
type: SyncableParameterType.NUMBER,
canSync: true
},
{ key: 'max_tokens', serverKey: 'max_tokens', type: SyncableParameterType.NUMBER, canSync: true },
{ key: 'samplers', serverKey: 'samplers', type: SyncableParameterType.STRING, canSync: true },
{
key: 'pasteLongTextToFileLen',
serverKey: 'pasteLongTextToFileLen',
type: SyncableParameterType.NUMBER,
canSync: true
},
{
key: 'pdfAsImage',
serverKey: 'pdfAsImage',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'showThoughtInProgress',
serverKey: 'showThoughtInProgress',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'keepStatsVisible',
serverKey: 'keepStatsVisible',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'showMessageStats',
serverKey: 'showMessageStats',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'askForTitleConfirmation',
serverKey: 'askForTitleConfirmation',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'disableAutoScroll',
serverKey: 'disableAutoScroll',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'renderUserContentAsMarkdown',
serverKey: 'renderUserContentAsMarkdown',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'autoMicOnEmpty',
serverKey: 'autoMicOnEmpty',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'pyInterpreterEnabled',
serverKey: 'pyInterpreterEnabled',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'enableContinueGeneration',
serverKey: 'enableContinueGeneration',
type: SyncableParameterType.BOOLEAN,
canSync: true
},
{
key: 'fullHeightCodeBlocks',
serverKey: 'fullHeightCodeBlocks',
type: SyncableParameterType.BOOLEAN,
canSync: true
}
];
export class ParameterSyncService {
/**
*
*
* Extraction
*
*
*/
/**
* Round floating-point numbers to avoid JavaScript precision issues.
* E.g., 0.1 + 0.2 = 0.30000000000000004 → 0.3
*
* @param value - Parameter value to normalize
* @returns Precision-normalized value
*/
private static roundFloatingPoint(value: ParameterValue): ParameterValue {
return normalizeFloatingPoint(value) as ParameterValue;
}
/**
* Extract server default parameters that can be synced from `/props` response.
* Handles both generation settings parameters and webui-specific settings.
* Converts samplers array to semicolon-delimited string for UI display.
*
* @param serverParams - Raw generation settings from server `/props` endpoint
* @param webuiSettings - Optional webui-specific settings from server
* @returns Record of extracted parameter key-value pairs with normalized precision
*/
static extractServerDefaults(
serverParams: ApiLlamaCppServerProps['default_generation_settings']['params'] | null,
webuiSettings?: Record<string, string | number | boolean>
): ParameterRecord {
const extracted: ParameterRecord = {};
if (serverParams) {
for (const param of SYNCABLE_PARAMETERS) {
if (param.canSync && param.serverKey in serverParams) {
const value = (serverParams as unknown as Record<string, ParameterValue>)[
param.serverKey
];
if (value !== undefined) {
// Apply precision rounding to avoid JavaScript floating-point issues
extracted[param.key] = this.roundFloatingPoint(value);
}
}
}
// Handle samplers array conversion to string
if (serverParams.samplers && Array.isArray(serverParams.samplers)) {
extracted.samplers = serverParams.samplers.join(';');
}
}
if (webuiSettings) {
for (const param of SYNCABLE_PARAMETERS) {
if (param.canSync && param.serverKey in webuiSettings) {
const value = webuiSettings[param.serverKey];
if (value !== undefined) {
extracted[param.key] = this.roundFloatingPoint(value);
}
}
}
}
return extracted;
}
/**
*
*
* Merging
*
*
*/
/**
* Merge server defaults with current user settings.
* User overrides always take priority — only parameters not in `userOverrides`
* set will be updated from server defaults.
*
* @param currentSettings - Current parameter values in the settings store
* @param serverDefaults - Default values extracted from server props
* @param userOverrides - Set of parameter keys explicitly overridden by the user
* @returns Merged parameter record with user overrides preserved
*/
static mergeWithServerDefaults(
currentSettings: ParameterRecord,
serverDefaults: ParameterRecord,
userOverrides: Set<string> = new Set()
): ParameterRecord {
const merged = { ...currentSettings };
for (const [key, serverValue] of Object.entries(serverDefaults)) {
// Only update if user hasn't explicitly overridden this parameter
if (!userOverrides.has(key)) {
merged[key] = this.roundFloatingPoint(serverValue);
}
}
return merged;
}
/**
*
*
* Info
*
*
*/
/**
* Get parameter information including source and values.
* Used by ChatSettingsParameterSourceIndicator to display the correct badge
* (Custom vs Default) for each parameter in the settings UI.
*
* @param key - The parameter key to get info for
* @param currentValue - The current value of the parameter
* @param propsDefaults - Server default values from `/props`
* @param userOverrides - Set of parameter keys explicitly overridden by the user
* @returns Parameter info with source, server default, and user override values
*/
static getParameterInfo(
key: string,
currentValue: ParameterValue,
propsDefaults: ParameterRecord,
userOverrides: Set<string>
): ParameterInfo {
const hasPropsDefault = propsDefaults[key] !== undefined;
const isUserOverride = userOverrides.has(key);
// Simple logic: either using default (from props) or custom (user override)
const source = isUserOverride ? ParameterSource.CUSTOM : ParameterSource.DEFAULT;
return {
value: currentValue,
source,
serverDefault: hasPropsDefault ? propsDefaults[key] : undefined, // Keep same field name for compatibility
userOverride: isUserOverride ? currentValue : undefined
};
}
/**
* Check if a parameter can be synced from server.
*
* @param key - The parameter key to check
* @returns True if the parameter is in the syncable parameters list
*/
static canSyncParameter(key: string): boolean {
return SYNCABLE_PARAMETERS.some((param) => param.key === key && param.canSync);
}
/**
* Get all syncable parameter keys.
*
* @returns Array of parameter keys that can be synced from server
*/
static getSyncableParameterKeys(): string[] {
return SYNCABLE_PARAMETERS.filter((param) => param.canSync).map((param) => param.key);
}
/**
* Validate a server parameter value against its expected type.
*
* @param key - The parameter key to validate
* @param value - The value to validate
* @returns True if value matches the expected type for this parameter
*/
static validateServerParameter(key: string, value: ParameterValue): boolean {
const param = SYNCABLE_PARAMETERS.find((p) => p.key === key);
if (!param) return false;
switch (param.type) {
case SyncableParameterType.NUMBER:
return typeof value === 'number' && !isNaN(value);
case SyncableParameterType.STRING:
return typeof value === 'string';
case SyncableParameterType.BOOLEAN:
return typeof value === 'boolean';
default:
return false;
}
}
/**
*
*
* Diff
*
*
*/
/**
* Create a diff between current settings and server defaults.
* Shows which parameters differ from server values, useful for debugging
* and for the "Reset to defaults" functionality.
*
* @param currentSettings - Current parameter values in the settings store
* @param serverDefaults - Default values extracted from server props
* @returns Record of parameter diffs with current value, server value, and whether they differ
*/
static createParameterDiff(
currentSettings: ParameterRecord,
serverDefaults: ParameterRecord
): Record<string, { current: ParameterValue; server: ParameterValue; differs: boolean }> {
const diff: Record<
string,
{ current: ParameterValue; server: ParameterValue; differs: boolean }
> = {};
for (const key of this.getSyncableParameterKeys()) {
const currentValue = currentSettings[key];
const serverValue = serverDefaults[key];
if (serverValue !== undefined) {
diff[key] = {
current: currentValue,
server: serverValue,
differs: currentValue !== serverValue
};
}
}
return diff;
}
}
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