feat: Support for Point2D

LICENSE

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+MIT License
+
+Copyright (c) 2023 fujikawahiroaki <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# lucky_postgis
+
+Library for using PostGIS types in the Lucky framework and Avram ORM.
+
+## Caution
+
+Currently the only supported type is Point2D.
+
+Arrays of type Point2D are not yet supported.
+
+Other types will be added in the future.
+
+## Installation
+
+1. Add the dependency to your `shard.yml`:
+
+   ```yaml
+   dependencies:
+     lucky_postgis:
+       github: fujikawahiroaki/lucky_postgis
+   ```
+
+2. Run `shards install`
+
+## Usage
+
+```crystal
+require "lucky_postgis"
+```
+
+## Development
+
+TODO: Write development instructions here
+
+## Contributing
+
+1. Fork it (<https://github.com/your-github-user/lucky_postgis/fork>)
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request
+
+## Contributors
+
+- [fujikawahiroaki](https://github.com/your-github-user) - creator and maintainer

shard.yml

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+name: lucky_postgis
+version: 0.1.0
+
+authors:
+  - fujikawahiroaki <[email protected]>
+
+crystal: ">= 0.36"
+
+license: MIT
+
+crystalline:
+  main: src/lucky_postgis.cr"
+
+dependencies:
+  avram:
+    github: luckyframework/avram
+
+  postgis:
+    github: fujikawahiroaki/postgis

spec/lucky_postgis_spec.cr

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+require "./spec_helper"
+
+describe LuckyPostgis do
+  # TODO: Write tests
+
+  it "works" do
+    false.should eq(true)
+  end
+end

spec/spec_helper.cr

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+require "spec"
+require "../src/lucky_postgis"

src/lucky_postgis.cr

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+require "./point2d_extensions"

src/point2d_extensions.cr

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+require "avram"
+require "postgis"
+
+struct PostGIS::Point2D
+  include JSON::Serializable
+  @[JSON::Field(key: "x")]
+  property x : Float64
+
+  @[JSON::Field(key: "y")]
+  property y : Float64
+
+  @[JSON::Field(key: "srid")]
+  property srid : UInt32
+
+  def self.adapter
+    Lucky
+  end
+
+  module Lucky
+    alias ColumnType = PostGIS::Point2D
+    include Avram::Type
+
+    def self.criteria(query : T, column) forall T
+      Criteria(T, Point2D).new(query, column)
+    end
+
+    def from_db!(value : PostGIS::Point2D)
+      value
+    end
+
+    def parse(value : PostGIS::Point2D)
+      SuccessfulCast(PostGIS::Point2D).new(value)
+    end
+
+    def parse(value : String)
+      begin
+        point_data = Hash(String, (UInt32 | Float64)).from_json(value)
+        x = point_data["x"].as(Float64)
+        y = point_data["y"].as(Float64)
+        srid = point_data["srid"].as(UInt32)
+        point = PostGIS::Point2D.new(x, y, srid)
+        SuccessfulCast(PostGIS::Point2D).new(point)
+      rescue
+        FailedCast.new
+      end
+    end
+
+    def to_db(value : PostGIS::Point2D)
+      "POINT (#{value.x} #{value.y})"
+    end
+
+    class Criteria(T, V) < Avram::Criteria(T, V)
+      include Avram::IncludesCriteria(T, V)
+    end
+  end
+end