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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package repo
import (
"context"
"math"
"sort"
"strings"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/timeutil"
"github.com/go-enry/go-enry/v2"
)
// LanguageStat describes language statistics of a repository
type LanguageStat struct {
ID int64 `xorm:"pk autoincr"`
RepoID int64 `xorm:"UNIQUE(s) INDEX NOT NULL"`
CommitID string
IsPrimary bool
Language string `xorm:"VARCHAR(50) UNIQUE(s) INDEX NOT NULL"`
Percentage float32 `xorm:"-"`
Size int64 `xorm:"NOT NULL DEFAULT 0"`
Color string `xorm:"-"`
CreatedUnix timeutil.TimeStamp `xorm:"INDEX CREATED"`
}
func init() {
db.RegisterModel(new(LanguageStat))
}
// LanguageStatList defines a list of language statistics
type LanguageStatList []*LanguageStat
// LoadAttributes loads attributes
func (stats LanguageStatList) LoadAttributes() {
for i := range stats {
stats[i].Color = enry.GetColor(stats[i].Language)
}
}
func (stats LanguageStatList) getLanguagePercentages() map[string]float32 {
langPerc := make(map[string]float32)
var otherPerc float32
var total int64
for _, stat := range stats {
total += stat.Size
}
if total > 0 {
for _, stat := range stats {
perc := float32(float64(stat.Size) / float64(total) * 100)
if perc <= 0.1 {
otherPerc += perc
continue
}
langPerc[stat.Language] = perc
}
}
if otherPerc > 0 {
langPerc["other"] = otherPerc
}
roundByLargestRemainder(langPerc, 100)
return langPerc
}
// Rounds to 1 decimal point, target should be the expected sum of percs
func roundByLargestRemainder(percs map[string]float32, target float32) {
leftToDistribute := int(target * 10)
keys := make([]string, 0, len(percs))
for k, v := range percs {
percs[k] = v * 10
floored := math.Floor(float64(percs[k]))
leftToDistribute -= int(floored)
keys = append(keys, k)
}
// Sort the keys by the largest remainder
sort.SliceStable(keys, func(i, j int) bool {
_, remainderI := math.Modf(float64(percs[keys[i]]))
_, remainderJ := math.Modf(float64(percs[keys[j]]))
return remainderI > remainderJ
})
// Increment the values in order of largest remainder
for _, k := range keys {
percs[k] = float32(math.Floor(float64(percs[k])))
if leftToDistribute > 0 {
percs[k]++
leftToDistribute--
}
percs[k] /= 10
}
}
// GetLanguageStats returns the language statistics for a repository
func GetLanguageStats(ctx context.Context, repo *Repository) (LanguageStatList, error) {
stats := make(LanguageStatList, 0, 6)
if err := db.GetEngine(ctx).Where("`repo_id` = ?", repo.ID).Desc("`size`").Find(&stats); err != nil {
return nil, err
}
return stats, nil
}
// GetTopLanguageStats returns the top language statistics for a repository
func GetTopLanguageStats(ctx context.Context, repo *Repository, limit int) (LanguageStatList, error) {
stats, err := GetLanguageStats(ctx, repo)
if err != nil {
return nil, err
}
perc := stats.getLanguagePercentages()
topstats := make(LanguageStatList, 0, limit)
var other float32
for i := range stats {
if _, ok := perc[stats[i].Language]; !ok {
continue
}
if stats[i].Language == "other" || len(topstats) >= limit {
other += perc[stats[i].Language]
continue
}
stats[i].Percentage = perc[stats[i].Language]
topstats = append(topstats, stats[i])
}
if other > 0 {
topstats = append(topstats, &LanguageStat{
RepoID: repo.ID,
Language: "other",
Color: "#cccccc",
Percentage: float32(math.Round(float64(other)*10) / 10),
})
}
topstats.LoadAttributes()
return topstats, nil
}
// UpdateLanguageStats updates the language statistics for repository
func UpdateLanguageStats(ctx context.Context, repo *Repository, commitID string, stats map[string]int64) error {
ctx, committer, err := db.TxContext(ctx)
if err != nil {
return err
}
defer committer.Close()
sess := db.GetEngine(ctx)
oldstats, err := GetLanguageStats(ctx, repo)
if err != nil {
return err
}
var topLang string
var s int64
for lang, size := range stats {
if size > s {
s = size
topLang = strings.ToLower(lang)
}
}
for lang, size := range stats {
upd := false
llang := strings.ToLower(lang)
for _, s := range oldstats {
// Update already existing language
if strings.ToLower(s.Language) == llang {
s.CommitID = commitID
s.IsPrimary = llang == topLang
s.Size = size
if _, err := sess.ID(s.ID).Cols("`commit_id`", "`size`", "`is_primary`").Update(s); err != nil {
return err
}
upd = true
break
}
}
// Insert new language
if !upd {
if err := db.Insert(ctx, &LanguageStat{
RepoID: repo.ID,
CommitID: commitID,
IsPrimary: llang == topLang,
Language: lang,
Size: size,
}); err != nil {
return err
}
}
}
// Delete old languages
statsToDelete := make([]int64, 0, len(oldstats))
for _, s := range oldstats {
if s.CommitID != commitID {
statsToDelete = append(statsToDelete, s.ID)
}
}
if len(statsToDelete) > 0 {
if _, err := sess.In("`id`", statsToDelete).Delete(&LanguageStat{}); err != nil {
return err
}
}
// Update indexer status
if err = UpdateIndexerStatus(ctx, repo, RepoIndexerTypeStats, commitID); err != nil {
return err
}
return committer.Commit()
}
// CopyLanguageStat Copy originalRepo language stat information to destRepo (use for forked repo)
func CopyLanguageStat(ctx context.Context, originalRepo, destRepo *Repository) error {
ctx, committer, err := db.TxContext(ctx)
if err != nil {
return err
}
defer committer.Close()
RepoLang := make(LanguageStatList, 0, 6)
if err := db.GetEngine(ctx).Where("`repo_id` = ?", originalRepo.ID).Desc("`size`").Find(&RepoLang); err != nil {
return err
}
if len(RepoLang) > 0 {
for i := range RepoLang {
RepoLang[i].ID = 0
RepoLang[i].RepoID = destRepo.ID
RepoLang[i].CreatedUnix = timeutil.TimeStampNow()
}
// update destRepo's indexer status
tmpCommitID := RepoLang[0].CommitID
if err := UpdateIndexerStatus(ctx, destRepo, RepoIndexerTypeStats, tmpCommitID); err != nil {
return err
}
if err := db.Insert(ctx, &RepoLang); err != nil {
return err
}
}
return committer.Commit()
}
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