146 lines
3.6 KiB
Go
146 lines
3.6 KiB
Go
/*
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* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package search
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import (
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"errors"
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"sort"
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)
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type modeType int
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const (
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modeTypeProd modeType = iota + 1
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modeTypeDist
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)
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type bracket struct {
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Min float64 `json:"min"`
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Max float64 `json:"max"`
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}
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type column struct {
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Bracket bracket `json:"bracket"`
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Hints []projection `json:"hints"`
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Mode string `json:"mode"`
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Steps int `json:"steps"`
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Value float64 `json:"value"`
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}
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type projection struct {
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Compatibility float64 `json:"compatibility"`
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Count int `json:"count"`
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Sample float64 `json:"sample"`
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}
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type record struct {
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AccessCount int `json:"accessCount"`
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ClosestStn string `json:"closestStn"`
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Compatibility float64 `json:"compatibility"`
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DistanceToStn float64 `json:"distanceToStn"`
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DistanceToUser float64 `json:"distanceToUser"`
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Id int `json:"id"`
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Name string `json:"name"`
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Score float64 `json:"score"`
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Url string `json:"url"`
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features map[string]float64
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geo geoData
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}
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type queryContext struct {
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geo *geoData
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profile map[string]float64
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walkingDist float64
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}
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type geoData struct {
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Latitude float64 `json:"latitude"`
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Longitude float64 `json:"longitude"`
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}
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type recordSorter struct {
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ascending bool
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entries []record
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key string
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}
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func (s recordSorter) sort() {
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if s.ascending {
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sort.Sort(s)
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} else {
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sort.Sort(sort.Reverse(s))
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}
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}
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func (s recordSorter) Len() int {
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return len(s.entries)
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}
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func (s recordSorter) Less(i, j int) bool {
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entry1 := s.entries[i]
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entry2 := s.entries[j]
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switch s.key {
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case "accessCount":
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return entry1.AccessCount < entry2.AccessCount
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case "closestStn":
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return entry1.ClosestStn < entry2.ClosestStn
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case "compatibility":
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return entry1.Compatibility < entry2.Compatibility
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case "distanceToStn":
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return entry1.DistanceToStn < entry2.DistanceToStn
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case "distanceToUser":
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return entry1.DistanceToUser < entry2.DistanceToUser
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case "name":
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return entry1.Name < entry2.Name
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default:
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return entry1.Score < entry2.Score
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}
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}
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func (s recordSorter) Swap(i, j int) {
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s.entries[i], s.entries[j] = s.entries[j], s.entries[i]
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}
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func (m modeType) String() string {
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switch m {
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case modeTypeProd:
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return "product"
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case modeTypeDist:
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return "distance"
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default:
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return ""
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}
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}
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func parseModeType(mode string) (modeType, error) {
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switch mode {
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case "product":
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return modeTypeProd, nil
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case "distance":
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return modeTypeDist, nil
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default:
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return 0, errors.New("invalid mode type")
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}
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}
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