Feature/172 recency (#439)

* Fixed ts errors

* #172 - First draft at recency boost

src/components/ResultItemVault.svelte

@@ -98,9 +98,9 @@
       },
     }
   }
-  let elFolderPathIcon: HTMLElement
-  let elFilePathIcon: HTMLElement
-  let elEmbedIcon: HTMLElement
+  let elFolderPathIcon: HTMLElement | null = null
+  let elFilePathIcon: HTMLElement | null = null
+  let elEmbedIcon: HTMLElement | null = null
 
   $: {
     imagePath = null

src/globals.ts

@@ -41,6 +41,13 @@ export const enum Action {
   OpenInNewLeaf = 'open-in-new-leaf',
 }
 
+export const enum RecencyCutoff {
+  Disabled = '0',
+  Day = '1',
+  Week = '2',
+  Month = '3',
+}
+
 export type DocumentRef = { path: string; mtime: number }
 
 export type IndexedDocument = {
@@ -100,8 +107,8 @@ export type TextExtractorApi = {
 }
 
 export type AIImageAnalyzerAPI = {
-  analyzeImage: (file: TFile) => Promise<string>;
-  canBeAnalyzed: (file: TFile) => boolean;
+  analyzeImage: (file: TFile) => Promise<string>
+  canBeAnalyzed: (file: TFile) => boolean
 }
 
 export const SEPARATORS =

src/search/search-engine.ts

@@ -3,7 +3,12 @@ import MiniSearch, {
   type Options,
   type SearchResult,
 } from 'minisearch'
-import type { DocumentRef, IndexedDocument, ResultNote } from '../globals'
+import {
+  RecencyCutoff,
+  type DocumentRef,
+  type IndexedDocument,
+  type ResultNote,
+} from '../globals'
 
 import { chunkArray, logVerbose, removeDiacritics } from '../tools/utils'
 import { Notice } from 'obsidian'
@@ -171,6 +176,25 @@ export class SearchEngine {
       },
       // The query is already tokenized, don't tokenize again
       tokenize: text => [text],
+      boostDocument(_id, _term, storedFields) {
+        if (
+          !storedFields?.mtime ||
+          settings.recencyBoost === RecencyCutoff.Disabled
+        ) {
+          return 1
+        }
+        const mtime = storedFields?.mtime as number
+        const now = new Date().valueOf()
+        const daysElapsed = (now - mtime) / (24 * 3600)
+
+        // Documents boost
+        const cutoff = {
+          [RecencyCutoff.Day]: -3,
+          [RecencyCutoff.Week]: -0.3,
+          [RecencyCutoff.Month]: -0.1,
+        } as const
+        return 1 + Math.exp(cutoff[settings.recencyBoost] * daysElapsed)
+      },
     })
 
     logVerbose(`Found ${results.length} results`, results)
@@ -300,7 +324,8 @@ export class SearchEngine {
 
     const documents = await Promise.all(
       results.map(
-        async result => await this.plugin.documentsRepository.getDocument(result.id)
+        async result =>
+          await this.plugin.documentsRepository.getDocument(result.id)
       )
     )
 
@@ -376,7 +401,8 @@ export class SearchEngine {
 
     const documents = await Promise.all(
       results.map(
-        async result => await this.plugin.documentsRepository.getDocument(result.id)
+        async result =>
+          await this.plugin.documentsRepository.getDocument(result.id)
       )
     )
 
@@ -503,7 +529,7 @@ export class SearchEngine {
         'headings2',
         'headings3',
       ],
-      storeFields: ['tags'],
+      storeFields: ['tags', 'mtime'],
       logger(_level, _message, code) {
         if (code === 'version_conflict') {
           new Notice(

src/settings.ts

@@ -9,7 +9,7 @@ import {
   SliderComponent,
 } from 'obsidian'
 import { writable } from 'svelte/store'
-import { K_DISABLE_OMNISEARCH } from './globals'
+import { K_DISABLE_OMNISEARCH, RecencyCutoff } from './globals'
 import type OmnisearchPlugin from './main'
 import { enableVerboseLogging, getCtrlKeyLabel } from './tools/utils'
 import { debounce } from 'lodash-es'
@@ -29,6 +29,8 @@ export interface OmnisearchSettings extends WeightingSettings {
   useCache: boolean
   /** Respect the "excluded files" Obsidian setting by downranking results ignored files */
   hideExcluded: boolean
+  /** Boost more recent files */
+  recencyBoost: RecencyCutoff
   /** downrank files in the given folders */
   downrankedFoldersFilters: string[]
   /** Ignore diacritics when indexing files */
@@ -317,6 +319,24 @@ export class SettingsTab extends PluginSettingTab {
         })
       )
 
+    new Setting(containerEl)
+      .setName('Recency boost (experimental)')
+      .setDesc('Files that have been modified more recently than [selected cutoff] are given a higher rank.')
+      .addDropdown(dropdown =>
+        dropdown
+          .addOptions({
+            [RecencyCutoff.Disabled]: 'Disabled',
+            [RecencyCutoff.Day]: '24 hours',
+            [RecencyCutoff.Week]: '7 days',
+            [RecencyCutoff.Month]: '30 days',
+          })
+          .setValue(settings.recencyBoost)
+          .onChange(async v => {
+            settings.recencyBoost = v as RecencyCutoff
+            await saveSettings(this.plugin)
+          })
+      )
+
     // Downranked files
     new Setting(containerEl)
       .setName('Folders to downrank in search results')
@@ -398,7 +418,9 @@ export class SettingsTab extends PluginSettingTab {
     // Set Vim like navigation keys
     new Setting(containerEl)
       .setName('Set Vim like navigation keys')
-      .setDesc(`Navigate down the results with ${getCtrlKeyLabel()} + J/N, or navigate up with ${getCtrlKeyLabel()} + K/P.`)
+      .setDesc(
+        `Navigate down the results with ${getCtrlKeyLabel()} + J/N, or navigate up with ${getCtrlKeyLabel()} + K/P.`
+      )
       .addToggle(toggle =>
         toggle
           .setValue(settings.vimLikeNavigationShortcut)
@@ -793,6 +815,7 @@ export function getDefaultSettings(app: App): OmnisearchSettings {
   return {
     useCache: true,
     hideExcluded: false,
+    recencyBoost: RecencyCutoff.Disabled,
     downrankedFoldersFilters: [] as string[],
     ignoreDiacritics: true,
     ignoreArabicDiacritics: false,