meifamily/ptt-alertor

package controllers

import (
    "fmt"
    "net/http"
    "sort"

    "github.com/Ptt-Alertor/ptt-alertor/models"
    "github.com/Ptt-Alertor/ptt-alertor/models/keyword"
    "github.com/julienschmidt/httprouter"
)

func KeywordBoards(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
    type keywordCount struct {
        board string
        count int
    }
    keywordCounts := make([]keywordCount, 0)
    boards := models.Board().List()
    for _, name := range boards {
        cnt := len(keyword.Subscribers(name))
        kc := keywordCount{board: name, count: cnt}
        keywordCounts = append(keywordCounts, kc)
    }
    sort.Slice(keywordCounts, func(i, j int) bool {
        return keywordCounts[i].count > keywordCounts[j].count
    })
    for _, kc := range keywordCounts {
        fmt.Fprintf(w, "%s: %d\n", kc.board, kc.count)
    }
}