Merge branch 'feature-more-like-this' into dev

docs/api.rst

@@ -221,21 +221,16 @@ Each fragment contains a list of strings, and some of them are marked as a highl
 
     [
         [
-            {"text": "This is a sample text with a "},
-            {"text": "highlighted", "term": 0},
-            {"text": " word."}
+            {"text": "This is a sample text with a ", "highlight": false},
+            {"text": "highlighted", "highlight": true},
+            {"text": " word.", "highlight": false}
         ],
         [
-            {"text": "Another", "term": 1},
-            {"text": " fragment with a highlight."}
+            {"text": "Another", "highlight": true},
+            {"text": " fragment with a highlight.", "highlight": false}
         ]
     ]
 
-
-
-When ``term`` is present within a string, the word within ``text`` should be highlighted.
-The term index groups multiple matches together and words with the same index
-should get identical highlighting.
 A client may use this example to produce the following output:
 
 ... This is a sample text with a **highlighted** word. ... **Another** fragment with a highlight. ...

src-ui/src/app/components/document-detail/document-detail.component.html

@@ -34,6 +34,12 @@
 
     </div>
 
+    <button type="button" class="btn btn-sm btn-outline-primary mr-2" (click)="moreLike()">
+        <svg class="buttonicon" fill="currentColor">
+            <use xlink:href="assets/bootstrap-icons.svg#three-dots" />
+        </svg>
+        <span class="d-none d-lg-inline"> More like this</span>
+    </button>
 
     <button type="button" class="btn btn-sm btn-outline-primary" (click)="close()">
         <svg class="buttonicon" fill="currentColor">

src-ui/src/app/components/document-detail/document-detail.component.ts

@@ -172,6 +172,10 @@ export class DocumentDetailComponent implements OnInit {
 
   }
 
+  moreLike() {
+    this.router.navigate(["search"], {queryParams: {more_like:this.document.id}})
+  }
+
   hasNext() {
     return this.documentListViewService.hasNext(this.documentId)
   }

src-ui/src/app/components/document-list/document-card-large/document-card-large.component.html

@@ -23,8 +23,14 @@
         </p>
 
 
-        <div class="d-flex justify-content-between align-items-center">
+        <div class="d-flex align-items-center">
           <div class="btn-group">
+            <a routerLink="/search" [queryParams]="{'more_like': document.id}" class="btn btn-sm btn-outline-secondary" *ngIf="moreLikeThis">
+              <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-three-dots" viewBox="0 0 16 16">
+                <path fill-rule="evenodd" d="M3 9.5a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3z"/>
+              </svg>
+              More like this
+            </a>
             <a routerLink="/documents/{{document.id}}" class="btn btn-sm btn-outline-secondary">
               <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-pencil" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
                 <path fill-rule="evenodd" d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5L13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175l-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
@@ -45,10 +51,16 @@
               </svg>
               Download
             </a>
+            
           </div>
+
+          <small class="text-muted ml-auto">Score:</small>
+
+          <ngb-progressbar *ngIf="searchScore" [type]="searchScoreClass" [value]="searchScore" class="search-score-bar mx-2" [max]="1"></ngb-progressbar>
+          
           <small class="text-muted">Created: {{document.created | date}}</small>
         </div>
-
+        
       </div>
     </div>
   </div>

src-ui/src/app/components/document-list/document-card-large/document-card-large.component.scss

@@ -9,4 +9,10 @@
   height: 100%;
   position: absolute;
 
+}
+
+.search-score-bar {
+  width: 100px;
+  height: 5px;
+  margin-top: 2px;
 }

src-ui/src/app/components/document-list/document-card-large/document-card-large.component.ts

@@ -12,6 +12,9 @@ export class DocumentCardLargeComponent implements OnInit {
 
   constructor(private documentService: DocumentService, private sanitizer: DomSanitizer) { }
 
+  @Input()
+  moreLikeThis: boolean = false
+
   @Input()
   document: PaperlessDocument
 
@@ -24,6 +27,19 @@ export class DocumentCardLargeComponent implements OnInit {
   @Output()
   clickCorrespondent = new EventEmitter<number>()
 
+  @Input()
+  searchScore: number
+
+  get searchScoreClass() {
+    if (this.searchScore > 0.7) {
+      return "success"
+    } else if (this.searchScore > 0.3) {
+      return "warning"
+    } else {
+      return "danger"
+    }
+  }
+
   ngOnInit(): void {
   }
 

src-ui/src/app/components/search/result-highlight/result-highlight.component.html

@@ -1,3 +1,3 @@
 ... <span *ngFor="let fragment of highlights">
-    <span *ngFor="let token of fragment" [ngClass]="token.term != null ? 'match term'+ token.term : ''">{{token.text}}</span> ... 
+    <span *ngFor="let token of fragment" [class.match]="token.highlight">{{token.text}}</span> ... 
 </span>

src-ui/src/app/components/search/result-highlight/result-highlight.component.scss

@@ -1,4 +1,4 @@
 .match {
     color: black;
-    background-color: orange;
+    background-color: rgb(255, 211, 66);
 }

src-ui/src/app/components/search/search.component.html

@@ -3,7 +3,12 @@
 
 <div *ngIf="errorMessage" class="alert alert-danger">Invalid search query: {{errorMessage}}</div>
 
-<p>
+<p *ngIf="more_like">
+    Showing documents similar to
+    <a routerLink="/documents/{{more_like}}">{{more_like_doc?.original_file_name}}</a>
+</p>
+
+<p *ngIf="query">
     Search string: <i>{{query}}</i>
     <ng-container *ngIf="correctedQuery">
         - Did you mean "<a [routerLink]="" (click)="searchCorrectedQuery()">{{correctedQuery}}</a>"?
@@ -15,7 +20,9 @@
     <p>{{resultCount}} result(s)</p>
     <app-document-card-large *ngFor="let result of results"
         [document]="result.document"
-        [details]="result.highlights">
+        [details]="result.highlights"
+        [searchScore]="result.score / maxScore"
+        [moreLikeThis]="true">
 
 </app-document-card-large>
 </div>

src-ui/src/app/components/search/search.component.ts

@@ -1,6 +1,9 @@
 import { Component, OnInit } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
+import { PaperlessDocument } from 'src/app/data/paperless-document';
+import { PaperlessDocumentType } from 'src/app/data/paperless-document-type';
 import { SearchHit } from 'src/app/data/search-result';
+import { DocumentService } from 'src/app/services/rest/document.service';
 import { SearchService } from 'src/app/services/rest/search.service';
 
 @Component({
@@ -14,6 +17,10 @@ export class SearchComponent implements OnInit {
 
   query: string = ""
 
+  more_like: number
+
+  more_like_doc: PaperlessDocument
+
   searching = false
 
   currentPage = 1
@@ -26,11 +33,24 @@ export class SearchComponent implements OnInit {
 
   errorMessage: string
 
-  constructor(private searchService: SearchService, private route: ActivatedRoute, private router: Router) { }
+  get maxScore() {
+    return this.results?.length > 0 ? this.results[0].score : 100
+  }
+
+  constructor(private searchService: SearchService, private route: ActivatedRoute, private router: Router, private documentService: DocumentService) { }
 
   ngOnInit(): void {
     this.route.queryParamMap.subscribe(paramMap => {
+      window.scrollTo(0, 0)
       this.query = paramMap.get('query')
+      this.more_like = paramMap.has('more_like') ? +paramMap.get('more_like') : null
+      if (this.more_like) {
+        this.documentService.get(this.more_like).subscribe(r => {
+          this.more_like_doc = r
+        })
+      } else {
+        this.more_like_doc = null
+      }
       this.searching = true
       this.currentPage = 1
       this.loadPage()
@@ -39,13 +59,14 @@ export class SearchComponent implements OnInit {
   }
 
   searchCorrectedQuery() {
-    this.router.navigate(["search"], {queryParams: {query: this.correctedQuery}})
+    this.router.navigate(["search"], {queryParams: {query: this.correctedQuery, more_like: this.more_like}})
   }
 
   loadPage(append: boolean = false) {
     this.errorMessage = null
     this.correctedQuery = null
-    this.searchService.search(this.query, this.currentPage).subscribe(result => {
+
+    this.searchService.search(this.query, this.currentPage, this.more_like).subscribe(result => {
       if (append) {
         this.results.push(...result.results)
       } else {

src-ui/src/app/services/rest/search.service.ts

@@ -15,11 +15,17 @@ export class SearchService {
   
   constructor(private http: HttpClient, private documentService: DocumentService) { }
 
-  search(query: string, page?: number): Observable<SearchResult> {
-    let httpParams = new HttpParams().set('query', query)
+  search(query: string, page?: number, more_like?: number): Observable<SearchResult> {
+    let httpParams = new HttpParams()
+    if (query) {
+      httpParams = httpParams.set('query', query)
+    }
     if (page) {
       httpParams = httpParams.set('page', page.toString())
     }
+    if (more_like) {
+      httpParams = httpParams.set('more_like', more_like.toString())
+    }
     return this.http.get<SearchResult>(`${environment.apiBaseUrl}search/`, {params: httpParams}).pipe(
       map(result => {
         result.results.forEach(hit => this.documentService.addObservablesToDocument(hit.document))

src/documents/index.py

@@ -3,7 +3,7 @@ import os
 from contextlib import contextmanager
 
 from django.conf import settings
-from whoosh import highlight
+from whoosh import highlight, classify, query
 from whoosh.fields import Schema, TEXT, NUMERIC, KEYWORD, DATETIME
 from whoosh.highlight import Formatter, get_text
 from whoosh.index import create_in, exists_in, open_dir
@@ -20,32 +20,37 @@ class JsonFormatter(Formatter):
         self.seen = {}
 
     def format_token(self, text, token, replace=False):
-        seen = self.seen
         ttext = self._text(get_text(text, token, replace))
-        if ttext in seen:
-            termnum = seen[ttext]
-        else:
-            termnum = len(seen)
-            seen[ttext] = termnum
-
-        return {'text': ttext, 'term': termnum}
+        return {'text': ttext, 'highlight': 'true'}
 
     def format_fragment(self, fragment, replace=False):
         output = []
         index = fragment.startchar
         text = fragment.text
-
+        amend_token = None
         for t in fragment.matches:
             if t.startchar is None:
                 continue
             if t.startchar < index:
                 continue
             if t.startchar > index:
-                output.append({'text': text[index:t.startchar]})
-            output.append(self.format_token(text, t, replace))
+                text_inbetween = text[index:t.startchar]
+                if amend_token and t.startchar - index < 10:
+                    amend_token['text'] += text_inbetween
+                else:
+                    output.append({'text': text_inbetween,
+                                   'highlight': False})
+                    amend_token = None
+            token = self.format_token(text, t, replace)
+            if amend_token:
+                amend_token['text'] += token['text']
+            else:
+                output.append(token)
+                amend_token = token
             index = t.endchar
         if index < fragment.endchar:
-            output.append({'text': text[index:fragment.endchar]})
+            output.append({'text': text[index:fragment.endchar],
+                           'highlight': False})
         return output
 
     def format(self, fragments, replace=False):
@@ -120,22 +125,42 @@ def remove_document_from_index(document):
 
 
 @contextmanager
-def query_page(ix, querystring, page):
+def query_page(ix, page, querystring, more_like_doc_id, more_like_doc_content):
     searcher = ix.searcher()
     try:
-        qp = MultifieldParser(
-            ["content", "title", "correspondent", "tag", "type"],
-            ix.schema)
-        qp.add_plugin(DateParserPlugin())
+        if querystring:
+            qp = MultifieldParser(
+                ["content", "title", "correspondent", "tag", "type"],
+                ix.schema)
+            qp.add_plugin(DateParserPlugin())
+            str_q = qp.parse(querystring)
+            corrected = searcher.correct_query(str_q, querystring)
+        else:
+            str_q = None
+            corrected = None
+
+        if more_like_doc_id:
+            docnum = searcher.document_number(id=more_like_doc_id)
+            kts = searcher.key_terms_from_text(
+                'content', more_like_doc_content, numterms=20,
+                model=classify.Bo1Model, normalize=False)
+            more_like_q = query.Or(
+                [query.Term('content', word, boost=weight)
+                 for word, weight in kts])
+            result_page = searcher.search_page(
+                more_like_q, page, filter=str_q, mask={docnum})
+        elif str_q:
+            result_page = searcher.search_page(str_q, page)
+        else:
+            raise ValueError(
+                "Either querystring or more_like_doc_id is required."
+            )
 
-        q = qp.parse(querystring)
-        result_page = searcher.search_page(q, page)
         result_page.results.fragmenter = highlight.ContextFragmenter(
             surround=50)
         result_page.results.formatter = JsonFormatter()
 
-        corrected = searcher.correct_query(q, querystring)
-        if corrected.query != q:
+        if corrected and corrected.query != str_q:
             corrected_query = corrected.string
         else:
             corrected_query = None

src/documents/tests/test_api.py

@@ -351,6 +351,25 @@ class TestDocumentApi(DirectoriesMixin, APITestCase):
 
         self.assertEqual(correction, None)
 
+    def test_search_more_like(self):
+        d1=Document.objects.create(title="invoice", content="the thing i bought at a shop and paid with bank account", checksum="A", pk=1)
+        d2=Document.objects.create(title="bank statement 1", content="things i paid for in august", pk=2, checksum="B")
+        d3=Document.objects.create(title="bank statement 3", content="things i paid for in september", pk=3, checksum="C")
+        with AsyncWriter(index.open_index()) as writer:
+            index.update_document(writer, d1)
+            index.update_document(writer, d2)
+            index.update_document(writer, d3)
+
+        response = self.client.get(f"/api/search/?more_like={d2.id}")
+
+        self.assertEqual(response.status_code, 200)
+
+        results = response.data['results']
+
+        self.assertEqual(len(results), 2)
+        self.assertEqual(results[0]['id'], d3.id)
+        self.assertEqual(results[1]['id'], d1.id)
+
     def test_statistics(self):
 
         doc1 = Document.objects.create(title="none1", checksum="A")

src/documents/views.py

@@ -340,14 +340,27 @@ class SearchView(APIView):
                 }
 
     def get(self, request, format=None):
-        if 'query' not in request.query_params:
+
+        if 'query' in request.query_params:
+            query = request.query_params['query']
+        else:
+            query = None
+
+        if 'more_like' in request.query_params:
+            more_like_id = request.query_params['more_like']
+            more_like_content = Document.objects.get(id=more_like_id).content
+        else:
+            more_like_id = None
+            more_like_content = None
+
+        if not query and not more_like_id:
             return Response({
                 'count': 0,
                 'page': 0,
                 'page_count': 0,
+                'corrected_query': None,
                 'results': []})
 
-        query = request.query_params['query']
         try:
             page = int(request.query_params.get('page', 1))
         except (ValueError, TypeError):
@@ -357,8 +370,7 @@ class SearchView(APIView):
             page = 1
 
         try:
-            with index.query_page(self.ix, query, page) as (result_page,
-                                                            corrected_query):
+            with index.query_page(self.ix, page, query, more_like_id, more_like_content) as (result_page, corrected_query):  # NOQA: E501
                 return Response(
                     {'count': len(result_page),
                      'page': result_page.pagenum,