1
restaurant-search/types.go

146 lines
3.6 KiB
Go

/*
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* 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.
*/
package search
import (
"errors"
"sort"
)
type modeType int
const (
modeTypeProd modeType = iota + 1
modeTypeDist
)
type bracket struct {
Min float64 `json:"min"`
Max float64 `json:"max"`
}
type column struct {
Bracket bracket `json:"bracket"`
Hints []projection `json:"hints"`
Mode string `json:"mode"`
Steps int `json:"steps"`
Value float64 `json:"value"`
}
type projection struct {
Compatibility float64 `json:"compatibility"`
Count int `json:"count"`
Sample float64 `json:"sample"`
}
type record struct {
AccessCount int `json:"accessCount"`
ClosestStn string `json:"closestStn"`
Compatibility float64 `json:"compatibility"`
DistanceToStn float64 `json:"distanceToStn"`
DistanceToUser float64 `json:"distanceToUser"`
Id int `json:"id"`
Name string `json:"name"`
Score float64 `json:"score"`
Url string `json:"url"`
features map[string]float64
geo geoData
}
type queryContext struct {
geo *geoData
profile map[string]float64
walkingDist float64
}
type geoData struct {
Latitude float64 `json:"latitude"`
Longitude float64 `json:"longitude"`
}
type recordSorter struct {
ascending bool
entries []record
key string
}
func (s recordSorter) sort() {
if s.ascending {
sort.Sort(s)
} else {
sort.Sort(sort.Reverse(s))
}
}
func (s recordSorter) Len() int {
return len(s.entries)
}
func (s recordSorter) Less(i, j int) bool {
entry1 := s.entries[i]
entry2 := s.entries[j]
switch s.key {
case "accessCount":
return entry1.AccessCount < entry2.AccessCount
case "closestStn":
return entry1.ClosestStn < entry2.ClosestStn
case "compatibility":
return entry1.Compatibility < entry2.Compatibility
case "distanceToStn":
return entry1.DistanceToStn < entry2.DistanceToStn
case "distanceToUser":
return entry1.DistanceToUser < entry2.DistanceToUser
case "name":
return entry1.Name < entry2.Name
default:
return entry1.Score < entry2.Score
}
}
func (s recordSorter) Swap(i, j int) {
s.entries[i], s.entries[j] = s.entries[j], s.entries[i]
}
func (m modeType) String() string {
switch m {
case modeTypeProd:
return "product"
case modeTypeDist:
return "distance"
default:
return ""
}
}
func parseModeType(mode string) (modeType, error) {
switch mode {
case "product":
return modeTypeProd, nil
case "distance":
return modeTypeDist, nil
default:
return 0, errors.New("invalid mode type")
}
}