1
restaurant-search/server.go

285 lines
7.1 KiB
Go
Raw Normal View History

/*
* 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 main
import (
"database/sql"
"encoding/json"
2015-03-26 04:20:34 +00:00
"fmt"
_ "github.com/go-sql-driver/mysql"
"log"
"net/http"
2015-03-24 03:45:18 +00:00
"os"
"path/filepath"
2015-03-24 03:45:18 +00:00
"strings"
)
var db *sql.DB
func executeQuery(rw http.ResponseWriter, req *http.Request) {
2015-03-25 03:00:54 +00:00
var request jsonQueryRequest
2015-03-24 11:52:40 +00:00
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
2015-03-25 11:17:12 +00:00
var geo *geoData
2015-03-24 13:55:25 +00:00
if request.Geo != nil {
2015-03-25 11:17:12 +00:00
geo = &geoData{request.Geo.Latitude, request.Geo.Longitude}
2015-03-24 13:55:25 +00:00
}
2015-03-25 09:41:19 +00:00
entries := getRecords(queryContext{geo, request.Profile, request.WalkingDist})
2015-03-25 04:12:22 +00:00
features := fixFeatures(request.Features)
foundEntries := findRecords(entries, features, request.MinScore)
2015-03-25 03:33:41 +00:00
2015-03-25 04:23:06 +00:00
response := jsonQueryResponse{
2015-03-25 09:41:19 +00:00
Count: len(foundEntries),
2015-03-25 04:23:06 +00:00
Columns: make(map[string]jsonColumn),
2015-03-25 11:17:12 +00:00
Records: make([]jsonRecord, 0)}
2015-03-25 04:23:06 +00:00
2015-03-25 04:12:22 +00:00
for name, value := range features {
column := jsonColumn{Value: value, Steps: request.HintSteps}
2015-03-25 03:33:41 +00:00
hints := project(
2015-03-26 02:30:31 +00:00
entries,
2015-03-25 04:12:22 +00:00
features,
name,
2015-03-25 03:33:41 +00:00
request.MinScore,
request.HintSteps)
for _, hint := range hints {
2015-03-25 11:17:12 +00:00
jsonHint := jsonProjection{hint.compatibility, hint.count, hint.sample}
2015-03-25 03:33:41 +00:00
column.Hints = append(column.Hints, jsonHint)
}
2015-03-25 04:12:22 +00:00
response.Columns[name] = column
2015-03-25 03:33:41 +00:00
}
2015-03-25 04:12:22 +00:00
for index, value := range foundEntries {
2015-03-25 10:57:42 +00:00
if index >= request.MaxResults {
2015-03-25 03:33:41 +00:00
break
}
2015-03-25 09:41:19 +00:00
item := jsonRecord{
2015-03-25 04:12:22 +00:00
Name: value.name,
2015-03-26 03:18:43 +00:00
Url: value.url,
2015-03-25 04:12:22 +00:00
Score: value.score,
Compatibility: value.compatibility,
2015-03-25 04:12:22 +00:00
DistanceToUser: value.distanceToUser,
DistanceToStn: value.distanceToStn,
ClosestStn: value.closestStn,
AccessCount: value.accessCount,
Id: value.id}
2015-03-25 03:33:41 +00:00
2015-03-25 11:17:12 +00:00
response.Records = append(response.Records, item)
2015-03-25 03:33:41 +00:00
}
js, err := json.Marshal(response)
if err != nil {
log.Fatal(err)
}
rw.Header().Set("Content-Type", "application/json")
rw.Write(js)
}
func getCategories(rw http.ResponseWriter, req *http.Request) {
2015-03-25 10:25:14 +00:00
categoryRows, err := db.Query("SELECT description, id FROM categories")
if err != nil {
log.Fatal(err)
}
2015-03-25 10:25:14 +00:00
defer categoryRows.Close()
2015-03-24 11:59:56 +00:00
var categories []jsonCategory
2015-03-25 10:25:14 +00:00
for categoryRows.Next() {
var (
description string
id int
)
2015-03-25 10:25:14 +00:00
if err := categoryRows.Scan(&description, &id); err != nil {
log.Fatal(err)
}
2015-03-24 11:59:56 +00:00
categories = append(categories, jsonCategory{description, id})
}
2015-03-25 10:25:14 +00:00
if err := categoryRows.Err(); err != nil {
log.Fatal(err)
}
js, err := json.Marshal(categories)
if err != nil {
log.Fatal(err)
}
rw.Header().Set("Content-Type", "application/json")
rw.Write(js)
}
func addCategory(rw http.ResponseWriter, req *http.Request) {
2015-03-24 13:34:06 +00:00
var request jsonAddCategoryRequest
2015-03-24 03:22:21 +00:00
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
2015-03-24 13:34:06 +00:00
response := jsonAddCategoryResponse{Description: strings.TrimSpace(request.Description)}
2015-03-24 03:22:21 +00:00
if len(request.Description) > 0 {
result, err := db.Exec("INSERT INTO categories(description) VALUES(?)", request.Description)
if err != nil {
log.Fatal(err)
2015-03-24 03:22:21 +00:00
}
insertId, err := result.LastInsertId()
if err != nil {
log.Fatal(err)
2015-03-24 03:22:21 +00:00
}
affectedRows, err := result.RowsAffected()
if err != nil {
log.Fatal(err)
2015-03-24 03:22:21 +00:00
}
2015-03-24 03:22:21 +00:00
response.Success = affectedRows > 0
response.Id = int(insertId)
}
js, err := json.Marshal(response)
if err != nil {
log.Fatal(err)
2015-03-24 03:22:21 +00:00
}
rw.Header().Set("Content-Type", "application/json")
rw.Write(js)
}
func removeCategory(rw http.ResponseWriter, req *http.Request) {
2015-03-24 13:34:06 +00:00
var request jsonRemoveCategoryRequest
2015-03-24 02:58:00 +00:00
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
result, err := db.Exec("DELETE FROM categories WHERE id = (?)", request.Id)
if err != nil {
log.Fatal(err)
}
2015-03-24 03:22:21 +00:00
affectedRows, err := result.RowsAffected()
if err != nil {
log.Fatal(err)
}
2015-03-24 13:34:06 +00:00
js, err := json.Marshal(jsonRemoveCategoryResponse{affectedRows > 0})
if err != nil {
log.Fatal(err)
}
rw.Header().Set("Content-Type", "application/json")
rw.Write(js)
}
func accessReview(rw http.ResponseWriter, req *http.Request) {
2015-03-25 10:10:34 +00:00
var request jsonAccessRequest
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
2015-03-26 03:18:43 +00:00
reviewsResult, err := db.Exec("UPDATE reviews SET accessCount = accessCount + 1 WHERE id = (?)", request.Id)
if err != nil {
log.Fatal(err)
}
2015-03-25 10:10:34 +00:00
2015-03-26 03:18:43 +00:00
rowsAffected, err := reviewsResult.RowsAffected()
if err != nil {
log.Fatal(err)
2015-03-25 10:10:34 +00:00
}
2015-03-26 03:18:43 +00:00
if rowsAffected == 0 || len(request.Profile) == 0 {
return
}
2015-03-25 10:10:34 +00:00
2015-03-26 03:18:43 +00:00
historyResult, err := db.Exec("INSERT INTO history(date, reviewId) VALUES(NOW(), ?)", request.Id)
if err != nil {
log.Fatal(err)
2015-03-25 10:10:34 +00:00
}
2015-03-26 03:18:43 +00:00
insertId, err := historyResult.LastInsertId()
2015-03-25 10:10:34 +00:00
if err != nil {
log.Fatal(err)
}
2015-03-26 03:18:43 +00:00
for id, value := range request.Profile {
if _, err := db.Exec("INSERT INTO historyGroups(categoryId, categoryValue, historyId) VALUES(?, ?, ?)", id, value, insertId); err != nil {
log.Fatal(err)
}
}
}
2015-03-26 04:20:34 +00:00
func clearHistory(rw http.ResponseWriter, req *http.Request) {
if _, err := db.Exec("DELETE FROM history"); err != nil {
log.Fatal(err)
}
if _, err := db.Exec("DELETE FROM historyGroups"); err != nil {
log.Fatal(err)
}
rw.Header().Set("Content-Type", "text/plain")
fmt.Fprint(rw, "History tables cleared")
}
2015-03-24 11:52:40 +00:00
func staticPath() (string, error) {
if len(os.Args) > 1 {
return os.Args[1], nil
}
return filepath.Abs(filepath.Join(filepath.Dir(os.Args[0]), "static"))
}
func main() {
2015-03-24 11:52:40 +00:00
dir, err := staticPath()
if err != nil {
log.Fatal(err)
}
db, err = sql.Open("mysql", "hscd@/hscd")
if err != nil {
log.Fatal(err)
}
defer db.Close()
http.HandleFunc("/query", executeQuery)
http.HandleFunc("/categories", getCategories)
http.HandleFunc("/learn", addCategory)
http.HandleFunc("/forget", removeCategory)
http.HandleFunc("/access", accessReview)
2015-03-26 04:20:34 +00:00
http.HandleFunc("/clear", clearHistory)
http.Handle("/", http.FileServer(http.Dir(dir)))
2015-03-25 09:22:57 +00:00
log.Fatal(http.ListenAndServe(":8080", nil))
}