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autocomplete: rework tag autocomplete behavior.

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Reworks tag autocomplete to work the same way for all users. Previously
autocomplete for Builders worked differently than autocomplete for
regular users.

This is how it works now:

* If the search starts with a slash (/), then do a tag abbreviation
  match. For example, `/evth` matches eyebrows_visible_through_hair.
* Otherwise if the search contains a wildcard (*), then just do a simple
  wildcard search.
* Otherwise do a tag prefix match against tags and aliases. For example,
  `black` matches all tags or aliases beginning with `black`.
* If the tag prefix match returns no results, then do a autocorrect match.

The differences for regular users:

* You can abbreviate tags with a slash (/).

The differences for Builders:

* Now tag abbreviations have to start with a slash (/).
* Autocorrect isn't performed unless a regular search returns no results.
* Results are always sorted by tag count. Before different types of
  results (regular tag matches, alias matches, abbreviation matches,
  and autocorrect matches) were all mixed together based on a tag
  weighting scheme.
This commit is contained in:
evazion
2020-12-13 00:45:22 -06:00
parent adc1c2c2cc
commit b0be8ae456
5 changed files with 89 additions and 12 deletions
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31
test/unit/autocomplete_service_test.rb
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@@ -80,6 +80,37 @@ class AutocompleteServiceTest < ActiveSupport::TestCase
assert_autocomplete_includes("touhou", "~tou", :tag_query)
end
should "autocomplete tag abbreviations" do
create(:tag, name: "mole", post_count: 150)
create(:tag, name: "mole_under_eye", post_count: 100)
create(:tag, name: "mole_under_mouth", post_count: 50)
assert_autocomplete_equals(%w[mole mole_under_eye mole_under_mouth], "/m", :tag_query)
assert_autocomplete_equals(%w[mole_under_eye mole_under_mouth], "/mu", :tag_query)
assert_autocomplete_equals(%w[mole_under_mouth], "/mum", :tag_query)
assert_autocomplete_equals(%w[mole_under_eye], "/mue", :tag_query)
assert_autocomplete_equals(%w[mole_under_eye], "/*ue", :tag_query)
assert_autocomplete_includes("mole_under_eye", "-/mue", :tag_query)
assert_autocomplete_includes("mole_under_eye", "~/mue", :tag_query)
end
should "autocomplete wildcard searches" do
create(:tag, name: "mole", post_count: 150)
create(:tag, name: "mole_under_eye", post_count: 100)
create(:tag, name: "mole_under_mouth", post_count: 50)
assert_autocomplete_equals(%w[mole mole_under_eye mole_under_mouth], "mole*", :tag_query)
assert_autocomplete_equals(%w[mole_under_eye mole_under_mouth], "*under*", :tag_query)
assert_autocomplete_equals(%w[mole_under_eye], "*eye", :tag_query)
end
should "autocorrect misspelled tags" do
create(:tag, name: "touhou")
assert_autocomplete_equals(%w[touhou], "touhuo", :tag_query)
end
should "autocomplete static metatags" do
assert_autocomplete_equals(["status:active"], "status:act", :tag_query)
assert_autocomplete_equals(["parent:active"], "parent:act", :tag_query)