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tangled.org
1package pages
2
3import (
4 "bytes"
5 "embed"
6 "fmt"
7 "html"
8 "html/template"
9 "io"
10 "io/fs"
11 "log"
12 "net/http"
13 "path"
14 "path/filepath"
15 "strings"
16
17 "github.com/alecthomas/chroma/v2"
18 chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
19 "github.com/alecthomas/chroma/v2/lexers"
20 "github.com/alecthomas/chroma/v2/styles"
21 "github.com/dustin/go-humanize"
22 "github.com/sotangled/tangled/appview/auth"
23 "github.com/sotangled/tangled/appview/db"
24 "github.com/sotangled/tangled/types"
25)
26
27//go:embed templates/* static/*
28var files embed.FS
29
30type Pages struct {
31 t map[string]*template.Template
32}
33
34func funcMap() template.FuncMap {
35 return template.FuncMap{
36 "split": func(s string) []string {
37 return strings.Split(s, "\n")
38 },
39 "splitOn": func(s, sep string) []string {
40 return strings.Split(s, sep)
41 },
42 "add": func(a, b int) int {
43 return a + b
44 },
45 "sub": func(a, b int) int {
46 return a - b
47 },
48 "cond": func(cond interface{}, a, b string) string {
49 if cond == nil {
50 return b
51 }
52
53 if boolean, ok := cond.(bool); boolean && ok {
54 return a
55 }
56
57 return b
58 },
59 "didOrHandle": func(did, handle string) string {
60 if handle != "" {
61 return fmt.Sprintf("@%s", handle)
62 } else {
63 return did
64 }
65 },
66 "assoc": func(values ...string) ([][]string, error) {
67 if len(values)%2 != 0 {
68 return nil, fmt.Errorf("invalid assoc call, must have an even number of arguments")
69 }
70 pairs := make([][]string, 0)
71 for i := 0; i < len(values); i += 2 {
72 pairs = append(pairs, []string{values[i], values[i+1]})
73 }
74 return pairs, nil
75 },
76 "append": func(s []string, values ...string) []string {
77 s = append(s, values...)
78 return s
79 },
80 "timeFmt": humanize.Time,
81 "byteFmt": humanize.Bytes,
82 "length": func(v []string) int {
83 return len(v)
84 },
85 "splitN": func(s, sep string, n int) []string {
86 return strings.SplitN(s, sep, n)
87 },
88 "escapeHtml": func(s string) template.HTML {
89 if s == "" {
90 return template.HTML("<br>")
91 }
92 return template.HTML(s)
93 },
94 "unescapeHtml": func(s string) string {
95 return html.UnescapeString(s)
96 },
97 "nl2br": func(text string) template.HTML {
98 return template.HTML(strings.Replace(template.HTMLEscapeString(text), "\n", "<br>", -1))
99 },
100 "unwrapText": func(text string) string {
101 paragraphs := strings.Split(text, "\n\n")
102
103 for i, p := range paragraphs {
104 lines := strings.Split(p, "\n")
105 paragraphs[i] = strings.Join(lines, " ")
106 }
107
108 return strings.Join(paragraphs, "\n\n")
109 },
110 "sequence": func(n int) []struct{} {
111 return make([]struct{}, n)
112 },
113 }
114}
115
116func NewPages() *Pages {
117 templates := make(map[string]*template.Template)
118
119 // Walk through embedded templates directory and parse all .html files
120 err := fs.WalkDir(files, "templates", func(path string, d fs.DirEntry, err error) error {
121 if err != nil {
122 return err
123 }
124
125 if !d.IsDir() && strings.HasSuffix(path, ".html") {
126 name := strings.TrimPrefix(path, "templates/")
127 name = strings.TrimSuffix(name, ".html")
128
129 if !strings.HasPrefix(path, "templates/layouts/") {
130 // Add the page template on top of the base
131 tmpl, err := template.New(name).
132 Funcs(funcMap()).
133 ParseFS(files, "templates/layouts/*.html", path)
134 if err != nil {
135 return fmt.Errorf("setting up template: %w", err)
136 }
137
138 templates[name] = tmpl
139 log.Printf("loaded template: %s", name)
140 }
141
142 return nil
143 }
144 return nil
145 })
146 if err != nil {
147 log.Fatalf("walking template dir: %v", err)
148 }
149
150 log.Printf("total templates loaded: %d", len(templates))
151
152 return &Pages{
153 t: templates,
154 }
155}
156
157type LoginParams struct {
158}
159
160func (p *Pages) execute(name string, w io.Writer, params any) error {
161 return p.t[name].ExecuteTemplate(w, "layouts/base", params)
162}
163
164func (p *Pages) executePlain(name string, w io.Writer, params any) error {
165 return p.t[name].Execute(w, params)
166}
167
168func (p *Pages) executeRepo(name string, w io.Writer, params any) error {
169 return p.t[name].ExecuteTemplate(w, "layouts/repobase", params)
170}
171
172func (p *Pages) Login(w io.Writer, params LoginParams) error {
173 return p.executePlain("user/login", w, params)
174}
175
176type TimelineParams struct {
177 LoggedInUser *auth.User
178 Timeline []db.TimelineEvent
179}
180
181func (p *Pages) Timeline(w io.Writer, params TimelineParams) error {
182 return p.execute("timeline", w, params)
183}
184
185type SettingsParams struct {
186 LoggedInUser *auth.User
187 PubKeys []db.PublicKey
188}
189
190func (p *Pages) Settings(w io.Writer, params SettingsParams) error {
191 return p.execute("settings/keys", w, params)
192}
193
194type KnotsParams struct {
195 LoggedInUser *auth.User
196 Registrations []db.Registration
197}
198
199func (p *Pages) Knots(w io.Writer, params KnotsParams) error {
200 return p.execute("knots", w, params)
201}
202
203type KnotParams struct {
204 LoggedInUser *auth.User
205 Registration *db.Registration
206 Members []string
207 IsOwner bool
208}
209
210func (p *Pages) Knot(w io.Writer, params KnotParams) error {
211 return p.execute("knot", w, params)
212}
213
214type NewRepoParams struct {
215 LoggedInUser *auth.User
216 Knots []string
217}
218
219func (p *Pages) NewRepo(w io.Writer, params NewRepoParams) error {
220 return p.execute("repo/new", w, params)
221}
222
223type ProfilePageParams struct {
224 LoggedInUser *auth.User
225 UserDid string
226 UserHandle string
227 Repos []db.Repo
228 CollaboratingRepos []db.Repo
229}
230
231func (p *Pages) ProfilePage(w io.Writer, params ProfilePageParams) error {
232 return p.execute("user/profile", w, params)
233}
234
235type RepoInfo struct {
236 Name string
237 OwnerDid string
238 OwnerHandle string
239 Description string
240 SettingsAllowed bool
241}
242
243func (r RepoInfo) OwnerWithAt() string {
244 if r.OwnerHandle != "" {
245 return fmt.Sprintf("@%s", r.OwnerHandle)
246 } else {
247 return r.OwnerDid
248 }
249}
250
251func (r RepoInfo) FullName() string {
252 return path.Join(r.OwnerWithAt(), r.Name)
253}
254
255func (r RepoInfo) GetTabs() [][]string {
256 tabs := [][]string{
257 {"overview", "/"},
258 {"issues", "/issues"},
259 {"pulls", "/pulls"},
260 }
261
262 if r.SettingsAllowed {
263 tabs = append(tabs, []string{"settings", "/settings"})
264 }
265
266 return tabs
267}
268
269type RepoIndexParams struct {
270 LoggedInUser *auth.User
271 RepoInfo RepoInfo
272 Active string
273 types.RepoIndexResponse
274}
275
276func (p *Pages) RepoIndexPage(w io.Writer, params RepoIndexParams) error {
277 params.Active = "overview"
278 return p.executeRepo("repo/index", w, params)
279}
280
281type RepoLogParams struct {
282 LoggedInUser *auth.User
283 RepoInfo RepoInfo
284 types.RepoLogResponse
285}
286
287func (p *Pages) RepoLog(w io.Writer, params RepoLogParams) error {
288 return p.execute("repo/log", w, params)
289}
290
291type RepoCommitParams struct {
292 LoggedInUser *auth.User
293 RepoInfo RepoInfo
294 Active string
295 types.RepoCommitResponse
296}
297
298func (p *Pages) RepoCommit(w io.Writer, params RepoCommitParams) error {
299 params.Active = "overview"
300 return p.executeRepo("repo/commit", w, params)
301}
302
303type RepoTreeParams struct {
304 LoggedInUser *auth.User
305 RepoInfo RepoInfo
306 Active string
307 BreadCrumbs [][]string
308 BaseTreeLink string
309 BaseBlobLink string
310 types.RepoTreeResponse
311}
312
313type RepoTreeStats struct {
314 NumFolders uint64
315 NumFiles uint64
316}
317
318func (r RepoTreeParams) TreeStats() RepoTreeStats {
319 numFolders, numFiles := 0, 0
320 for _, f := range r.Files {
321 if !f.IsFile {
322 numFolders += 1
323 } else if f.IsFile {
324 numFiles += 1
325 }
326 }
327
328 return RepoTreeStats{
329 NumFolders: uint64(numFolders),
330 NumFiles: uint64(numFiles),
331 }
332}
333
334func (p *Pages) RepoTree(w io.Writer, params RepoTreeParams) error {
335 params.Active = "overview"
336 return p.execute("repo/tree", w, params)
337}
338
339type RepoBranchesParams struct {
340 LoggedInUser *auth.User
341 RepoInfo RepoInfo
342 types.RepoBranchesResponse
343}
344
345func (p *Pages) RepoBranches(w io.Writer, params RepoBranchesParams) error {
346 return p.executeRepo("repo/branches", w, params)
347}
348
349type RepoTagsParams struct {
350 LoggedInUser *auth.User
351 RepoInfo RepoInfo
352 types.RepoTagsResponse
353}
354
355func (p *Pages) RepoTags(w io.Writer, params RepoTagsParams) error {
356 return p.executeRepo("repo/tags", w, params)
357}
358
359type RepoBlobParams struct {
360 LoggedInUser *auth.User
361 RepoInfo RepoInfo
362 Active string
363 BreadCrumbs [][]string
364 types.RepoBlobResponse
365}
366
367func (p *Pages) RepoBlob(w io.Writer, params RepoBlobParams) error {
368 style := styles.Get("bw")
369 b := style.Builder()
370 b.Add(chroma.LiteralString, "noitalic")
371 style, _ = b.Build()
372
373 if params.Lines < 5000 {
374 c := params.Contents
375 formatter := chromahtml.New(
376 chromahtml.InlineCode(true),
377 chromahtml.WithLineNumbers(true),
378 chromahtml.WithLinkableLineNumbers(true, "L"),
379 chromahtml.Standalone(false),
380 )
381
382 lexer := lexers.Get(filepath.Base(params.Path))
383 if lexer == nil {
384 lexer = lexers.Fallback
385 }
386
387 iterator, err := lexer.Tokenise(nil, c)
388 if err != nil {
389 return fmt.Errorf("chroma tokenize: %w", err)
390 }
391
392 var code bytes.Buffer
393 err = formatter.Format(&code, style, iterator)
394 if err != nil {
395 return fmt.Errorf("chroma format: %w", err)
396 }
397
398 params.Contents = code.String()
399 }
400
401 params.Active = "overview"
402 return p.executeRepo("repo/blob", w, params)
403}
404
405type Collaborator struct {
406 Did string
407 Handle string
408 Role string
409}
410
411type RepoSettingsParams struct {
412 LoggedInUser *auth.User
413 RepoInfo RepoInfo
414 Collaborators []Collaborator
415 Active string
416 IsCollaboratorInviteAllowed bool
417}
418
419func (p *Pages) RepoSettings(w io.Writer, params RepoSettingsParams) error {
420 params.Active = "settings"
421 return p.executeRepo("repo/settings", w, params)
422}
423
424func (p *Pages) Static() http.Handler {
425 sub, err := fs.Sub(files, "static")
426 if err != nil {
427 log.Fatalf("no static dir found? that's crazy: %v", err)
428 }
429 return http.StripPrefix("/static/", http.FileServer(http.FS(sub)))
430}
431
432func (p *Pages) Error500(w io.Writer) error {
433 return p.execute("errors/500", w, nil)
434}
435
436func (p *Pages) Error404(w io.Writer) error {
437 return p.execute("errors/404", w, nil)
438}
439
440func (p *Pages) Error503(w io.Writer) error {
441 return p.execute("errors/503", w, nil)
442}