From f359529555fbf6fa344869d01f0b3c17ecce46c8 Mon Sep 17 00:00:00 2001
From: =?utf8?q?John=20Molakvo=C3=A6=20=28skjnldsv=29?=
 <skjnldsv@protonmail.com>
Date: Wed, 5 Aug 2020 12:56:11 +0200
Subject: [PATCH] Allow unified search filtering
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
---
 .../components/UnifiedSearch/SearchFilter.vue | 77 +++++++++++++++
 .../components/UnifiedSearch/SearchResult.vue | 21 +++++
 core/src/services/UnifiedSearchService.js     |  3 +
 core/src/views/UnifiedSearch.vue              | 94 +++++++++++++++++--
 4 files changed, 188 insertions(+), 7 deletions(-)
 create mode 100644 core/src/components/UnifiedSearch/SearchFilter.vue

diff --git a/core/src/components/UnifiedSearch/SearchFilter.vue b/core/src/components/UnifiedSearch/SearchFilter.vue
new file mode 100644
index 00000000000..f3c06a24528
--- /dev/null
+++ b/core/src/components/UnifiedSearch/SearchFilter.vue
@@ -0,0 +1,77 @@
+ <!--
+  - @copyright Copyright (c) 2020 John Molakvoæ <skjnldsv@protonmail.com>
+  -
+  - @author John Molakvoæ <skjnldsv@protonmail.com>
+  -
+  - @license GNU AGPL version 3 or any later version
+  -
+  - This program is free software: you can redistribute it and/or modify
+  - it under the terms of the GNU Affero General Public License as
+  - published by the Free Software Foundation, either version 3 of the
+  - License, or (at your option) any later version.
+  -
+  - This program is distributed in the hope that it will be useful,
+  - but WITHOUT ANY WARRANTY; without even the implied warranty of
+  - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  - GNU Affero General Public License for more details.
+  -
+  - You should have received a copy of the GNU Affero General Public License
+  - along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -
+  -->
+<template>
+	<li>
+		<a :title="t('core', 'Search for {name} only', { name })"
+			class="unified-search__filter"
+			href="#"
+			@click.prevent="onClick">
+			{{ filter }}
+		</a>
+	</li>
+</template>
+
+<script>
+export default {
+	name: 'SearchFilter',
+
+	props: {
+		type: {
+			type: String,
+			required: true,
+		},
+		name: {
+			type: String,
+			required: true,
+		},
+	},
+	computed: {
+		filter() {
+			return `in:${this.type}`
+		},
+	},
+
+	methods: {
+		onClick() {
+			this.$emit('click', this.filter)
+		},
+	},
+
+}
+</script>
+
+<style lang="scss" scoped>
+.unified-search__filter {
+	height: 1em;
+	margin-right: 5px;
+	padding: 3px 8px;
+	border-radius: 1em;
+	background-color: var(--color-background-darker);
+
+	&:active,
+	&:focus,
+	&:hover {
+		background-color: var(--color-background-hover);
+	}
+}
+
+</style>
diff --git a/core/src/components/UnifiedSearch/SearchResult.vue b/core/src/components/UnifiedSearch/SearchResult.vue
index d5374832da9..025ddef86c0 100644
--- a/core/src/components/UnifiedSearch/SearchResult.vue
+++ b/core/src/components/UnifiedSearch/SearchResult.vue
@@ -1,3 +1,24 @@
+ <!--
+  - @copyright Copyright (c) 2020 John Molakvoæ <skjnldsv@protonmail.com>
+  -
+  - @author John Molakvoæ <skjnldsv@protonmail.com>
+  -
+  - @license GNU AGPL version 3 or any later version
+  -
+  - This program is free software: you can redistribute it and/or modify
+  - it under the terms of the GNU Affero General Public License as
+  - published by the Free Software Foundation, either version 3 of the
+  - License, or (at your option) any later version.
+  -
+  - This program is distributed in the hope that it will be useful,
+  - but WITHOUT ANY WARRANTY; without even the implied warranty of
+  - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  - GNU Affero General Public License for more details.
+  -
+  - You should have received a copy of the GNU Affero General Public License
+  - along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -
+  -->
 <template>
 	<a :href="resourceUrl || '#'"
 		class="unified-search__result"
diff --git a/core/src/services/UnifiedSearchService.js b/core/src/services/UnifiedSearchService.js
index 1507ad5a2bd..152de3755f7 100644
--- a/core/src/services/UnifiedSearchService.js
+++ b/core/src/services/UnifiedSearchService.js
@@ -25,6 +25,9 @@ import axios from '@nextcloud/axios'
 
 export const defaultLimit = loadState('unified-search', 'limit-default')
 export const minSearchLength = 2
+export const regexFilterIn = /[^-]in:([a-z_-]+)/ig
+export const regexFilterNot = /-in:([a-z_-]+)/ig
+
 /**
  * Get the list of available search providers
  *
diff --git a/core/src/views/UnifiedSearch.vue b/core/src/views/UnifiedSearch.vue
index 4569d1c46b6..2d0b59db5dc 100644
--- a/core/src/views/UnifiedSearch.vue
+++ b/core/src/views/UnifiedSearch.vue
@@ -41,6 +41,17 @@
 				@keypress.enter.prevent.stop="onInputEnter">
 		</div>
 
+		<!-- Search filters -->
+		<div v-if="availableFilters.length > 1" class="unified-search__filters">
+			<ul>
+				<SearchFilter v-for="type in availableFilters"
+					:key="type"
+					:type="type"
+					:name="typesMap[type]"
+					@click="onClickFilter" />
+			</ul>
+		</div>
+
 		<template v-if="!hasResults">
 			<!-- Loading placeholders -->
 			<ul v-if="isLoading">
@@ -97,13 +108,14 @@
 </template>
 
 <script>
-import { minSearchLength, getTypes, search, defaultLimit } from '../services/UnifiedSearchService'
+import { minSearchLength, getTypes, search, defaultLimit, regexFilterIn, regexFilterNot } from '../services/UnifiedSearchService'
 import EmptyContent from '@nextcloud/vue/dist/Components/EmptyContent'
 import Magnify from 'vue-material-design-icons/Magnify'
 import debounce from 'debounce'
 import { emit } from '@nextcloud/event-bus'
 
 import HeaderMenu from '../components/HeaderMenu'
+import SearchFilter from '../components/UnifiedSearch/SearchFilter'
 import SearchResult from '../components/UnifiedSearch/SearchResult'
 import SearchResultPlaceholder from '../components/UnifiedSearch/SearchResultPlaceholder'
 
@@ -114,6 +126,7 @@ export default {
 		EmptyContent,
 		HeaderMenu,
 		Magnify,
+		SearchFilter,
 		SearchResult,
 		SearchResultPlaceholder,
 	},
@@ -162,10 +175,10 @@ export default {
 
 		/**
 		 * Return ordered results
-		 * @returns {Object}
+		 * @returns {Array}
 		 */
 		orderedResults() {
-			return Object.values(this.typesIDs)
+			return this.typesIDs
 				.filter(type => type in this.results)
 				.map(type => ({
 					type,
@@ -173,6 +186,41 @@ export default {
 				}))
 		},
 
+		/**
+		 * Available filters
+		 * We only show filters that are available on the results
+		 * @returns {string[]}
+		 */
+		availableFilters() {
+			return Object.keys(this.results)
+		},
+
+		/**
+		 * Applied filters
+		 * @returns {string[]}
+		 */
+		usedFiltersIn() {
+			let match
+			const filters = []
+			while ((match = regexFilterIn.exec(this.query)) !== null) {
+				filters.push(match[1])
+			}
+			return filters
+		},
+
+		/**
+		 * Applied anti filters
+		 * @returns {string[]}
+		 */
+		usedFiltersNot() {
+			let match
+			const filters = []
+			while ((match = regexFilterNot.exec(this.query)) !== null) {
+				filters.push(match[1])
+			}
+			return filters
+		},
+
 		/**
 		 * Is the current search too short
 		 * @returns {boolean}
@@ -291,12 +339,30 @@ export default {
 				return
 			}
 
+			let types = this.typesIDs
+			let query = this.query
+
+			// Filter out types
+			if (this.usedFiltersNot.length > 0) {
+				types = this.typesIDs.filter(type => this.usedFiltersNot.indexOf(type) === -1)
+			}
+
+			// Only use those filters if any and check if they are valid
+			if (this.usedFiltersIn.length > 0) {
+				types = this.typesIDs.filter(type => this.usedFiltersIn.indexOf(type) > -1)
+			}
+
+			// remove any filters from the query
+			query = query.replace(regexFilterIn, '').replace(regexFilterNot, '')
+
+			console.debug('Searching', query, 'in', types)
+
 			// reset search if the query changed
 			this.resetState()
 
-			this.typesIDs.forEach(async type => {
+			types.forEach(async type => {
 				this.$set(this.loading, type, true)
-				const request = await search(type, this.query)
+				const request = await search(type, query)
 
 				// Process results
 				if (request.data.entries.length > 0) {
@@ -478,6 +544,13 @@ export default {
 				this.focused = index
 			}
 		},
+
+		onClickFilter(filter) {
+			this.query = `${this.query} ${filter}`
+				.replace(/ {2}/g, ' ')
+				.trim()
+			this.onInput()
+		},
 	},
 }
 </script>
@@ -500,6 +573,14 @@ $input-padding: 6px;
 		background-color: var(--color-main-background);
 	}
 
+	&__filters {
+		margin: $margin / 2 $margin;
+		ul {
+			display: inline-flex;
+			justify-content: space-between;
+		}
+	}
+
 	&__input {
 		// Minus margins
 		width: calc(100% - 2 * #{$margin});
@@ -510,10 +591,9 @@ $input-padding: 6px;
 		&[placeholder],
 		&::placeholder {
 			overflow: hidden;
-			text-overflow:ellipsis;
 			white-space: nowrap;
+			text-overflow: ellipsis;
 		}
-
 	}
 
 	&__results {
-- 
2.39.5