Rough WIP - broken tests

Author: matt-bernhardt

README.md

@@ -120,13 +120,16 @@ mode (e.g., `GDT=false` will still enable GDT features). Note that this is curre
 may have unexpected consequences if applied to other TIMDEX UI apps.
 - `GLOBAL_ALERT`: The main functionality for this comes from our theme gem, but when set the value will be rendered as
   safe html above the main header of the site.
+- `ORIGINS`: sets origins for CORS (currently used only for TACOS API calls).
 - `PLATFORM_NAME`: The value set is added to the header after the MIT Libraries logo. The logic and CSS for this comes from our theme gem.
 - `REQUESTS_PER_PERIOD` - number of requests that can be made for general throttles per `REQUEST_PERIOD`
 - `REQUEST_PERIOD` - time in minutes used along with `REQUESTS_PER_PERIOD`
 - `REDIRECT_REQUESTS_PER_PERIOD`- number of requests that can be made that the query string starts with our legacy redirect parameter to throttle per `REQUEST_PERIOD`
 - `REDIRECT_REQUEST_PERIOD`- time in minutes used along with `REDIRECT_REQUEST_PERIOD`
 - `SENTRY_DSN`: Client key for Sentry exception logging.
 - `SENTRY_ENV`: Sentry environment for the application. Defaults to 'unknown' if unset.
+- `TACOS_URL`: The GraphQL endpoint for the [TACOS API](https://github.com/mitlibraries/tacos/). When set, the
+  application will log search terms to TACOS (and eventually return suggested resources that TACOS detects).
 - `TIMDEX_INDEX`: Name of the index, or alias, to provide to the GraphQL endpoint. Defaults to `nil` which will let TIMDEX determine the best index to use. Wildcard values can be set, for example `rdi*` would search any indexes that begin with `rdi` in the underlying OpenSearch instance behind TIMDEX.
 - `TIMDEX_SOURCES`: Comma-separated list of sources to display in the advanced-search source selection element. This
   overrides the default which is set in ApplicationHelper.

app/controllers/tacos_controller.rb

@@ -0,0 +1,9 @@
+class TacosController < ApplicationController
+  layout false
+
+  def analyze
+    return unless ApplicationHelper.tacos_enabled?
+
+    Tacos.call(params[:q])
+  end
+end

app/helpers/application_helper.rb

@@ -1,4 +1,9 @@
 module ApplicationHelper
+  def tacos_enabled?
+    ENV.fetch('TACOS_URL', false)
+  end
+  module_function :tacos_enabled?
+
   def timdex_sources
     ENV.fetch('TIMDEX_SOURCES', timdex_source_defaults).split(',')
   end

app/models/tacos.rb

@@ -0,0 +1,22 @@
+class Tacos
+  TACOS_URL = ENV.fetch('TACOS_URL', nil).freeze
+  ORIGINS = ENV.fetch('ORIGINS', nil).freeze
+
+  def self.call(term)
+    tacos_http = HTTP.persistent(TACOS_URL)
+                     .headers(accept: 'application/json',
+                              'Content-Type': 'application/json',
+                              origin: ORIGINS)
+    query = '{ "query": "{ logSearchEvent(searchTerm: \"' + clean_term(term) + '\", sourceSystem: \"use\" ) { phrase detectors { suggestedResources { title url } } } }" }'
+    raw_response = tacos_http.timeout(http_timeout).post(TACOS_URL, body: query)
+    JSON.parse(raw_response.to_s)
+  end
+
+  def self.clean_term(term)
+    term.gsub('"', '\'')
+  end
+
+  def self.http_timeout
+    ENV.fetch('TIMDEX_TIMEOUT', 6).to_f
+  end
+end

app/views/search/_trigger_tacos.html.erb

@@ -0,0 +1,8 @@
+<% return unless (tacos_enabled? and @enhanced_query[:q].present?) %>
+
+<% data_url = "/analyze?q=#{URI.encode_www_form_component(@enhanced_query[:q])}" %>
+
+<div class="tacos-container"
+     data-controller="content-loader"
+     data-content-loader-url-value=<%= data_url %>>
+</div>

app/views/search/results.html.erb

@@ -68,4 +68,6 @@
   <% end %>
 </div>
 
+<%= render(partial: 'trigger_tacos') if tacos_enabled? %>
+
 <%= javascript_include_tag "filters" %>

app/views/tacos/analyze.html.erb

@@ -0,0 +1 @@
+<!-- Result of TACOS analysis would go here -->

config/routes.rb

@@ -8,6 +8,8 @@
   get 'issn', to: 'fact#issn'
   get 'pmid', to: 'fact#pmid'
 
+  get 'analyze', to: 'tacos#analyze'
+
   get 'record/(:id)',
       to: 'record#view',
       as: 'record',