1package repo
2
3import (
4 "fmt"
5 "strings"
6 "time"
7
8 "github.com/charmbracelet/bubbles/key"
9 tea "github.com/charmbracelet/bubbletea"
10 "github.com/charmbracelet/glamour"
11 gansi "github.com/charmbracelet/glamour/ansi"
12 "github.com/charmbracelet/lipgloss"
13 ggit "github.com/charmbracelet/soft-serve/git"
14 "github.com/charmbracelet/soft-serve/ui/common"
15 "github.com/charmbracelet/soft-serve/ui/components/selector"
16 "github.com/charmbracelet/soft-serve/ui/components/viewport"
17 "github.com/charmbracelet/soft-serve/ui/git"
18 "github.com/muesli/reflow/wrap"
19 "github.com/muesli/termenv"
20)
21
22type logView int
23
24const (
25 logViewCommits logView = iota
26 logViewDiff
27)
28
29// LogCountMsg is a message that contains the number of commits in a repo.
30type LogCountMsg int64
31
32// LogItemsMsg is a message that contains a slice of LogItem.
33type LogItemsMsg []selector.IdentifiableItem
34
35// LogCommitMsg is a message that contains a git commit.
36type LogCommitMsg *ggit.Commit
37
38// LogDiffMsg is a message that contains a git diff.
39type LogDiffMsg *ggit.Diff
40
41// Log is a model that displays a list of commits and their diffs.
42type Log struct {
43 common common.Common
44 selector *selector.Selector
45 vp *viewport.Viewport
46 activeView logView
47 repo git.GitRepo
48 ref *ggit.Reference
49 count int64
50 nextPage int
51 activeCommit *ggit.Commit
52 selectedCommit *ggit.Commit
53 currentDiff *ggit.Diff
54}
55
56// NewLog creates a new Log model.
57func NewLog(common common.Common) *Log {
58 l := &Log{
59 common: common,
60 vp: viewport.New(),
61 activeView: logViewCommits,
62 }
63 selector := selector.New(common, []selector.IdentifiableItem{}, LogItemDelegate{common.Styles})
64 selector.SetShowFilter(false)
65 selector.SetShowHelp(false)
66 selector.SetShowPagination(false)
67 selector.SetShowStatusBar(false)
68 selector.SetShowTitle(false)
69 selector.SetFilteringEnabled(false)
70 selector.DisableQuitKeybindings()
71 selector.KeyMap.NextPage = common.KeyMap.NextPage
72 selector.KeyMap.PrevPage = common.KeyMap.PrevPage
73 l.selector = selector
74 return l
75}
76
77// SetSize implements common.Component.
78func (l *Log) SetSize(width, height int) {
79 l.common.SetSize(width, height)
80 l.selector.SetSize(width, height)
81 l.vp.SetSize(width, height)
82}
83
84// ShortHelp implements key.KeyMap.
85func (l *Log) ShortHelp() []key.Binding {
86 switch l.activeView {
87 case logViewCommits:
88 return []key.Binding{
89 key.NewBinding(
90 key.WithKeys(
91 "l",
92 "right",
93 ),
94 key.WithHelp(
95 "→",
96 "select",
97 ),
98 ),
99 }
100 case logViewDiff:
101 return []key.Binding{
102 l.common.KeyMap.UpDown,
103 key.NewBinding(
104 key.WithKeys(
105 "h",
106 "left",
107 ),
108 key.WithHelp(
109 "←",
110 "back",
111 ),
112 ),
113 }
114 default:
115 return []key.Binding{}
116 }
117}
118
119// Init implements tea.Model.
120func (l *Log) Init() tea.Cmd {
121 cmds := make([]tea.Cmd, 0)
122 cmds = append(cmds, l.updateCommitsCmd)
123 return tea.Batch(cmds...)
124}
125
126// Update implements tea.Model.
127func (l *Log) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
128 cmds := make([]tea.Cmd, 0)
129 switch msg := msg.(type) {
130 case RepoMsg:
131 l.count = 0
132 l.selector.Select(0)
133 l.nextPage = 0
134 l.activeView = 0
135 l.repo = git.GitRepo(msg)
136 case RefMsg:
137 l.ref = msg
138 l.count = 0
139 cmds = append(cmds, l.countCommitsCmd)
140 case LogCountMsg:
141 l.count = int64(msg)
142 case LogItemsMsg:
143 cmds = append(cmds, l.selector.SetItems(msg))
144 l.selector.SetPage(l.nextPage)
145 l.SetSize(l.common.Width, l.common.Height)
146 l.activeCommit = l.selector.SelectedItem().(LogItem).Commit
147 case tea.KeyMsg, tea.MouseMsg:
148 switch l.activeView {
149 case logViewCommits:
150 switch key := msg.(type) {
151 case tea.KeyMsg:
152 switch key.String() {
153 case "l", "right":
154 cmds = append(cmds, l.selector.SelectItem)
155 }
156 }
157 // This is a hack for loading commits on demand based on list.Pagination.
158 curPage := l.selector.Page()
159 s, cmd := l.selector.Update(msg)
160 m := s.(*selector.Selector)
161 l.selector = m
162 if m.Page() != curPage {
163 l.nextPage = m.Page()
164 l.selector.SetPage(curPage)
165 cmds = append(cmds, l.updateCommitsCmd)
166 }
167 cmds = append(cmds, cmd)
168 case logViewDiff:
169 switch key := msg.(type) {
170 case tea.KeyMsg:
171 switch key.String() {
172 case "h", "left":
173 l.activeView = logViewCommits
174 }
175 }
176 }
177 case selector.ActiveMsg:
178 switch sel := msg.IdentifiableItem.(type) {
179 case LogItem:
180 l.activeCommit = sel.Commit
181 }
182 cmds = append(cmds, updateStatusBarCmd)
183 case selector.SelectMsg:
184 switch sel := msg.IdentifiableItem.(type) {
185 case LogItem:
186 cmds = append(cmds, l.selectCommitCmd(sel.Commit))
187 }
188 case LogCommitMsg:
189 l.selectedCommit = msg
190 cmds = append(cmds, l.loadDiffCmd)
191 case LogDiffMsg:
192 l.currentDiff = msg
193 l.vp.SetContent(
194 lipgloss.JoinVertical(lipgloss.Top,
195 l.renderCommit(l.selectedCommit),
196 l.renderSummary(msg),
197 l.renderDiff(msg),
198 ),
199 )
200 l.vp.GotoTop()
201 l.activeView = logViewDiff
202 cmds = append(cmds, updateStatusBarCmd)
203 case tea.WindowSizeMsg:
204 if l.selectedCommit != nil && l.currentDiff != nil {
205 l.vp.SetContent(
206 lipgloss.JoinVertical(lipgloss.Top,
207 l.renderCommit(l.selectedCommit),
208 l.renderSummary(l.currentDiff),
209 l.renderDiff(l.currentDiff),
210 ),
211 )
212 }
213 if l.repo != nil {
214 cmds = append(cmds, l.updateCommitsCmd)
215 }
216 }
217 switch l.activeView {
218 case logViewDiff:
219 vp, cmd := l.vp.Update(msg)
220 l.vp = vp.(*viewport.Viewport)
221 if cmd != nil {
222 cmds = append(cmds, cmd)
223 }
224 }
225 return l, tea.Batch(cmds...)
226}
227
228// View implements tea.Model.
229func (l *Log) View() string {
230 switch l.activeView {
231 case logViewCommits:
232 return l.selector.View()
233 case logViewDiff:
234 return l.vp.View()
235 default:
236 return ""
237 }
238}
239
240// StatusBarValue returns the status bar value.
241func (l *Log) StatusBarValue() string {
242 c := l.activeCommit
243 if c == nil {
244 return ""
245 }
246 return fmt.Sprintf("%s by %s on %s",
247 c.ID.String()[:7],
248 c.Author.Name,
249 c.Author.When.Format("02 Jan 2006"),
250 )
251}
252
253// StatusBarInfo returns the status bar info.
254func (l *Log) StatusBarInfo() string {
255 switch l.activeView {
256 case logViewCommits:
257 // We're using l.nextPage instead of l.selector.Paginator.Page because
258 // of the paginator hack above.
259 return fmt.Sprintf("%d/%d", l.nextPage+1, l.selector.TotalPages())
260 case logViewDiff:
261 return fmt.Sprintf("%.f%%", l.vp.ScrollPercent()*100)
262 default:
263 return ""
264 }
265}
266
267func (l *Log) countCommitsCmd() tea.Msg {
268 count, err := l.repo.CountCommits(l.ref)
269 if err != nil {
270 return common.ErrorMsg(err)
271 }
272 return LogCountMsg(count)
273}
274
275func (l *Log) updateCommitsCmd() tea.Msg {
276 count := l.count
277 if l.count == 0 {
278 switch msg := l.countCommitsCmd().(type) {
279 case common.ErrorMsg:
280 return msg
281 case LogCountMsg:
282 count = int64(msg)
283 }
284 }
285 items := make([]selector.IdentifiableItem, count)
286 page := l.nextPage
287 limit := l.selector.PerPage()
288 skip := page * limit
289 // CommitsByPage pages start at 1
290 cc, err := l.repo.CommitsByPage(l.ref, page+1, limit)
291 if err != nil {
292 return common.ErrorMsg(err)
293 }
294 for i, c := range cc {
295 idx := i + skip
296 if int64(idx) >= count {
297 break
298 }
299 items[idx] = LogItem{c}
300 }
301 return LogItemsMsg(items)
302}
303
304func (l *Log) selectCommitCmd(commit *ggit.Commit) tea.Cmd {
305 return func() tea.Msg {
306 return LogCommitMsg(commit)
307 }
308}
309
310func (l *Log) loadDiffCmd() tea.Msg {
311 diff, err := l.repo.Diff(l.selectedCommit)
312 if err != nil {
313 return common.ErrorMsg(err)
314 }
315 return LogDiffMsg(diff)
316}
317
318func styleConfig() gansi.StyleConfig {
319 noColor := ""
320 s := glamour.DarkStyleConfig
321 s.Document.StylePrimitive.Color = &noColor
322 s.CodeBlock.Chroma.Text.Color = &noColor
323 s.CodeBlock.Chroma.Name.Color = &noColor
324 return s
325}
326
327func renderCtx() gansi.RenderContext {
328 return gansi.NewRenderContext(gansi.Options{
329 ColorProfile: termenv.TrueColor,
330 Styles: styleConfig(),
331 })
332}
333
334func (l *Log) renderCommit(c *ggit.Commit) string {
335 s := strings.Builder{}
336 // FIXME: lipgloss prints empty lines when CRLF is used
337 // sanitize commit message from CRLF
338 msg := strings.ReplaceAll(c.Message, "\r\n", "\n")
339 s.WriteString(fmt.Sprintf("%s\n%s\n%s\n%s\n",
340 l.common.Styles.LogCommitHash.Render("commit "+c.ID.String()),
341 l.common.Styles.LogCommitAuthor.Render(fmt.Sprintf("Author: %s <%s>", c.Author.Name, c.Author.Email)),
342 l.common.Styles.LogCommitDate.Render("Date: "+c.Committer.When.Format(time.UnixDate)),
343 l.common.Styles.LogCommitBody.Render(msg),
344 ))
345 return wrap.String(s.String(), l.common.Width-2)
346}
347
348func (l *Log) renderSummary(diff *ggit.Diff) string {
349 stats := strings.Split(diff.Stats().String(), "\n")
350 for i, line := range stats {
351 ch := strings.Split(line, "|")
352 if len(ch) > 1 {
353 adddel := ch[len(ch)-1]
354 adddel = strings.ReplaceAll(adddel, "+", l.common.Styles.LogCommitStatsAdd.Render("+"))
355 adddel = strings.ReplaceAll(adddel, "-", l.common.Styles.LogCommitStatsDel.Render("-"))
356 stats[i] = strings.Join(ch[:len(ch)-1], "|") + "|" + adddel
357 }
358 }
359 return wrap.String(strings.Join(stats, "\n"), l.common.Width-2)
360}
361
362func (l *Log) renderDiff(diff *ggit.Diff) string {
363 var s strings.Builder
364 var pr strings.Builder
365 diffChroma := &gansi.CodeBlockElement{
366 Code: diff.Patch(),
367 Language: "diff",
368 }
369 err := diffChroma.Render(&pr, renderCtx())
370 if err != nil {
371 s.WriteString(fmt.Sprintf("\n%s", err.Error()))
372 } else {
373 s.WriteString(fmt.Sprintf("\n%s", pr.String()))
374 }
375 return wrap.String(s.String(), l.common.Width-2)
376}