Refactor the setting to make unit test easier (#22405)

Some bugs caused by less unit tests in fundamental packages. This PR
refactor `setting` package so that create a unit test will be easier
than before.

- All `LoadFromXXX` files has been splited as two functions, one is
`InitProviderFromXXX` and `LoadCommonSettings`. The first functions will
only include the code to create or new a ini file. The second function
will load common settings.
- It also renames all functions in setting from `newXXXService` to
`loadXXXSetting` or `loadXXXFrom` to make the function name less
confusing.
- Move `XORMLog` to `SQLLog` because it's a better name for that.

Maybe we should finally move these `loadXXXSetting` into the `XXXInit`
function? Any idea?

---------

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: delvh <dev.lh@web.de>

modules/setting/ui.go

@@ -0,0 +1,152 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package setting
+
+import (
+	"time"
+
+	"code.gitea.io/gitea/modules/container"
+)
+
+// UI settings
+var UI = struct {
+	ExplorePagingNum      int
+	SitemapPagingNum      int
+	IssuePagingNum        int
+	RepoSearchPagingNum   int
+	MembersPagingNum      int
+	FeedMaxCommitNum      int
+	FeedPagingNum         int
+	PackagesPagingNum     int
+	GraphMaxCommitNum     int
+	CodeCommentLines      int
+	ReactionMaxUserNum    int
+	ThemeColorMetaTag     string
+	MaxDisplayFileSize    int64
+	ShowUserEmail         bool
+	DefaultShowFullName   bool
+	DefaultTheme          string
+	Themes                []string
+	Reactions             []string
+	ReactionsLookup       container.Set[string] `ini:"-"`
+	CustomEmojis          []string
+	CustomEmojisMap       map[string]string `ini:"-"`
+	SearchRepoDescription bool
+	UseServiceWorker      bool
+	OnlyShowRelevantRepos bool
+
+	Notification struct {
+		MinTimeout            time.Duration
+		TimeoutStep           time.Duration
+		MaxTimeout            time.Duration
+		EventSourceUpdateTime time.Duration
+	} `ini:"ui.notification"`
+
+	SVG struct {
+		Enabled bool `ini:"ENABLE_RENDER"`
+	} `ini:"ui.svg"`
+
+	CSV struct {
+		MaxFileSize int64
+	} `ini:"ui.csv"`
+
+	Admin struct {
+		UserPagingNum   int
+		RepoPagingNum   int
+		NoticePagingNum int
+		OrgPagingNum    int
+	} `ini:"ui.admin"`
+	User struct {
+		RepoPagingNum int
+	} `ini:"ui.user"`
+	Meta struct {
+		Author      string
+		Description string
+		Keywords    string
+	} `ini:"ui.meta"`
+}{
+	ExplorePagingNum:    20,
+	SitemapPagingNum:    20,
+	IssuePagingNum:      20,
+	RepoSearchPagingNum: 20,
+	MembersPagingNum:    20,
+	FeedMaxCommitNum:    5,
+	FeedPagingNum:       20,
+	PackagesPagingNum:   20,
+	GraphMaxCommitNum:   100,
+	CodeCommentLines:    4,
+	ReactionMaxUserNum:  10,
+	ThemeColorMetaTag:   `#6cc644`,
+	MaxDisplayFileSize:  8388608,
+	DefaultTheme:        `auto`,
+	Themes:              []string{`auto`, `gitea`, `arc-green`},
+	Reactions:           []string{`+1`, `-1`, `laugh`, `hooray`, `confused`, `heart`, `rocket`, `eyes`},
+	CustomEmojis:        []string{`git`, `gitea`, `codeberg`, `gitlab`, `github`, `gogs`},
+	CustomEmojisMap:     map[string]string{"git": ":git:", "gitea": ":gitea:", "codeberg": ":codeberg:", "gitlab": ":gitlab:", "github": ":github:", "gogs": ":gogs:"},
+	Notification: struct {
+		MinTimeout            time.Duration
+		TimeoutStep           time.Duration
+		MaxTimeout            time.Duration
+		EventSourceUpdateTime time.Duration
+	}{
+		MinTimeout:            10 * time.Second,
+		TimeoutStep:           10 * time.Second,
+		MaxTimeout:            60 * time.Second,
+		EventSourceUpdateTime: 10 * time.Second,
+	},
+	SVG: struct {
+		Enabled bool `ini:"ENABLE_RENDER"`
+	}{
+		Enabled: true,
+	},
+	CSV: struct {
+		MaxFileSize int64
+	}{
+		MaxFileSize: 524288,
+	},
+	Admin: struct {
+		UserPagingNum   int
+		RepoPagingNum   int
+		NoticePagingNum int
+		OrgPagingNum    int
+	}{
+		UserPagingNum:   50,
+		RepoPagingNum:   50,
+		NoticePagingNum: 25,
+		OrgPagingNum:    50,
+	},
+	User: struct {
+		RepoPagingNum int
+	}{
+		RepoPagingNum: 15,
+	},
+	Meta: struct {
+		Author      string
+		Description string
+		Keywords    string
+	}{
+		Author:      "Gitea - Git with a cup of tea",
+		Description: "Gitea (Git with a cup of tea) is a painless self-hosted Git service written in Go",
+		Keywords:    "go,git,self-hosted,gitea",
+	},
+}
+
+func loadUIFrom(rootCfg ConfigProvider) {
+	mustMapSetting(rootCfg, "ui", &UI)
+	sec := rootCfg.Section("ui")
+	UI.ShowUserEmail = sec.Key("SHOW_USER_EMAIL").MustBool(true)
+	UI.DefaultShowFullName = sec.Key("DEFAULT_SHOW_FULL_NAME").MustBool(false)
+	UI.SearchRepoDescription = sec.Key("SEARCH_REPO_DESCRIPTION").MustBool(true)
+	UI.UseServiceWorker = sec.Key("USE_SERVICE_WORKER").MustBool(false)
+	UI.OnlyShowRelevantRepos = sec.Key("ONLY_SHOW_RELEVANT_REPOS").MustBool(false)
+
+	UI.ReactionsLookup = make(container.Set[string])
+	for _, reaction := range UI.Reactions {
+		UI.ReactionsLookup.Add(reaction)
+	}
+	UI.CustomEmojisMap = make(map[string]string)
+	for _, emoji := range UI.CustomEmojis {
+		UI.CustomEmojisMap[emoji] = ":" + emoji + ":"
+	}
+}