feat: lesswrong library — frontpage, curated, top, tag

go.mod

@@ -20,6 +20,8 @@ require (
 	github.com/clipperhouse/displaywidth v0.4.1 // indirect
 	github.com/clipperhouse/stringish v0.1.1 // indirect
 	github.com/clipperhouse/uax29/v2 v2.3.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
 	github.com/mattn/go-runewidth v0.0.19 // indirect
@@ -28,10 +30,17 @@ require (
 	github.com/muesli/mango-cobra v1.2.0 // indirect
 	github.com/muesli/mango-pflag v0.1.0 // indirect
 	github.com/muesli/roff v0.1.0 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/spf13/pflag v1.0.9 // indirect
+	github.com/tamnd/any-cli v0.4.0 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/sync v0.17.0 // indirect
-	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.42.0 // indirect
 	golang.org/x/text v0.24.0 // indirect
+	modernc.org/libc v1.72.3 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+	modernc.org/sqlite v1.52.0 // indirect
 )

go.sum

@@ -29,6 +29,10 @@ github.com/clipperhouse/uax29/v2 v2.3.0/go.mod h1:Wn1g7MK6OoeDT0vL+Q0SQLDz/KpfsV
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/lucasb-eyer/go-colorful v1.3.0 h1:2/yBRLdWBZKrf7gB40FoiKfAWYQ0lqNcbuQwVHXptag=
@@ -47,8 +51,12 @@ github.com/muesli/mango-pflag v0.1.0 h1:UADqbYgpUyRoBja3g6LUL+3LErjpsOwaC9ywvBWe
 github.com/muesli/mango-pflag v0.1.0/go.mod h1:YEQomTxaCUp8PrbhFh10UfbhbQrM/xJ4i2PB8VTLLW0=
 github.com/muesli/roff v0.1.0 h1:YD0lalCotmYuF5HhZliKWlIx7IEhiXeSfq7hNjFqGF8=
 github.com/muesli/roff v0.1.0/go.mod h1:pjAHQM9hdUUwm/krAfrLGgJkXJ+YuhtsfZ42kieB2Ig=
+github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
+github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -58,17 +66,31 @@ github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
 github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tamnd/any-cli v0.4.0 h1:ngyRJBvjZ2X1iBlwlmDLvY2S9aQWlDjVE7CiOwxtt5Y=
+github.com/tamnd/any-cli v0.4.0/go.mod h1:lns3VfQVrC9hMy7YKBzIQoYpobnfSDIzJ8c27H2ILmk=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
 golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
 golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
 golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
+golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
 golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/libc v1.72.3 h1:ZnDF4tXn4NBXFutMMQC4vtbTFSXhhKzR73fv0beZEAU=
+modernc.org/libc v1.72.3/go.mod h1:dn0dZNnnn1clLyvRxLxYExxiKRZIRENOfqQ8XEeg4Qs=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/sqlite v1.52.0 h1:p4dhYh2tXZCiyaqHwRVJDjIGKWyXayiQpThxgDzJaxo=
+modernc.org/sqlite v1.52.0/go.mod h1:tcNzv5p84E0skkmJn038y+hWJbLQXQqEnQfeh5r2JLM=

lesswrong/domain.go

@@ -0,0 +1,189 @@
+package lesswrong
+
+import (
+	"context"
+	"errors"
+
+	"github.com/tamnd/any-cli/kit"
+	"github.com/tamnd/any-cli/kit/errs"
+)
+
+// Host is the LessWrong hostname claimed by the kit domain.
+const Host = "www.lesswrong.com"
+
+// domain.go exposes lesswrong as a kit Domain. A blank import from a multi-domain
+// host such as ant is enough to enable the driver:
+//
+//	import _ "github.com/tamnd/lesswrong-cli/lesswrong"
+//
+// The same Domain also drives the standalone lw binary via cli.Root(), so the
+// binary and any host share one source of truth.
+func init() { kit.Register(Domain{}) }
+
+// Domain is the LessWrong driver. It carries no state; the per-run client is
+// built by the factory Register hands to kit.
+type Domain struct{}
+
+// Info returns the scheme, claimed hostnames, and binary identity.
+func (Domain) Info() kit.DomainInfo {
+	return kit.DomainInfo{
+		Scheme: "lesswrong",
+		Hosts:  []string{Host},
+		Identity: kit.Identity{
+			Binary: "lesswrong",
+			Short:  "A command line for LessWrong.",
+			Long: `A command line for LessWrong. Browse frontpage, curated, and top posts, or filter by tag. No API key required.
+
+lw is an independent tool and is not affiliated with LessWrong.`,
+			Site: "https://www.lesswrong.com",
+			Repo: "https://github.com/tamnd/lesswrong-cli",
+		},
+	}
+}
+
+// Register installs the client factory and four operations onto app.
+func (Domain) Register(app *kit.App) {
+	app.SetClient(newClient)
+
+	kit.Handle(app, kit.OpMeta{
+		Name:    "frontpage",
+		Group:   "posts",
+		List:    true,
+		URIType: "post",
+		Summary: "LessWrong frontpage posts",
+	}, frontpagePosts)
+
+	kit.Handle(app, kit.OpMeta{
+		Name:    "curated",
+		Group:   "posts",
+		List:    true,
+		URIType: "post",
+		Summary: "LessWrong curated posts",
+	}, curatedPosts)
+
+	kit.Handle(app, kit.OpMeta{
+		Name:    "top",
+		Group:   "posts",
+		List:    true,
+		URIType: "post",
+		Summary: "LessWrong top posts by karma",
+	}, topPosts)
+
+	kit.Handle(app, kit.OpMeta{
+		Name:    "tag",
+		Group:   "posts",
+		List:    true,
+		URIType: "post",
+		Summary: "LessWrong posts by tag",
+		Args:    []kit.Arg{{Name: "tagID", Help: "tag ID or slug"}},
+	}, tagPosts)
+}
+
+// newClient builds the LessWrong client from the kit Config.
+func newClient(_ context.Context, cfg kit.Config) (any, error) {
+	c := DefaultConfig()
+	if cfg.UserAgent != "" {
+		c.UserAgent = cfg.UserAgent
+	}
+	if cfg.Rate > 0 {
+		c.Rate = cfg.Rate
+	}
+	if cfg.Retries > 0 {
+		c.Retries = cfg.Retries
+	}
+	if cfg.Timeout > 0 {
+		c.Timeout = cfg.Timeout
+	}
+	return NewClient(c), nil
+}
+
+// --- input structs ---
+
+type noArgIn struct {
+	Limit  int     `kit:"flag,inherit" help:"max results"`
+	Client *Client `kit:"inject"`
+}
+
+type tagIn struct {
+	TagID  string  `kit:"arg" help:"tag ID or slug"`
+	Limit  int     `kit:"flag,inherit" help:"max results"`
+	Client *Client `kit:"inject"`
+}
+
+// --- handlers ---
+
+func frontpagePosts(ctx context.Context, in noArgIn, emit func(*Post) error) error {
+	limit := in.Limit
+	if limit <= 0 {
+		limit = 20
+	}
+	posts, err := in.Client.Posts(ctx, "frontpage", limit, "")
+	if err != nil {
+		return mapErr(err)
+	}
+	for i := range posts {
+		if err := emit(&posts[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func curatedPosts(ctx context.Context, in noArgIn, emit func(*Post) error) error {
+	limit := in.Limit
+	if limit <= 0 {
+		limit = 20
+	}
+	posts, err := in.Client.Posts(ctx, "curated", limit, "")
+	if err != nil {
+		return mapErr(err)
+	}
+	for i := range posts {
+		if err := emit(&posts[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func topPosts(ctx context.Context, in noArgIn, emit func(*Post) error) error {
+	limit := in.Limit
+	if limit <= 0 {
+		limit = 20
+	}
+	posts, err := in.Client.Posts(ctx, "top", limit, "")
+	if err != nil {
+		return mapErr(err)
+	}
+	for i := range posts {
+		if err := emit(&posts[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func tagPosts(ctx context.Context, in tagIn, emit func(*Post) error) error {
+	limit := in.Limit
+	if limit <= 0 {
+		limit = 20
+	}
+	posts, err := in.Client.TagPosts(ctx, in.TagID, limit)
+	if err != nil {
+		return mapErr(err)
+	}
+	for i := range posts {
+		if err := emit(&posts[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// mapErr converts a library error into the appropriate kit error kind.
+func mapErr(err error) error {
+	if errors.Is(err, ErrNotFound) {
+		return errs.NotFound("%s", err.Error())
+	}
+	return err
+}

lesswrong/domain_test.go

@@ -0,0 +1,90 @@
+package lesswrong
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/tamnd/any-cli/kit"
+)
+
+// These tests are offline or use a local httptest.Server. They exercise the
+// domain metadata, operation wiring, and the four handlers without touching the
+// real LessWrong API.
+
+func TestDomainInfo(t *testing.T) {
+	info := Domain{}.Info()
+	if info.Scheme != "lesswrong" {
+		t.Errorf("Scheme = %q, want lesswrong", info.Scheme)
+	}
+	if info.Identity.Binary != "lesswrong" {
+		t.Errorf("Identity.Binary = %q, want lesswrong", info.Identity.Binary)
+	}
+	if len(info.Hosts) == 0 || info.Hosts[0] != Host {
+		t.Errorf("Hosts = %v, want [%s]", info.Hosts, Host)
+	}
+}
+
+func TestDomainOps(t *testing.T) {
+	// All four operations must be registered.
+	want := []string{"frontpage", "curated", "top", "tag"}
+	d := Domain{}
+	info := d.Info()
+	app := kit.New(info.Identity)
+	d.Register(app)
+
+	ops := app.Ops()
+	got := map[string]bool{}
+	for _, op := range ops {
+		got[op.Meta().Name] = true
+	}
+	for _, name := range want {
+		if !got[name] {
+			t.Errorf("operation %q not registered", name)
+		}
+	}
+	if len(ops) != len(want) {
+		t.Errorf("got %d ops, want %d", len(ops), len(want))
+	}
+}
+
+func TestDomainRegistered(t *testing.T) {
+	// init() in domain.go registers the domain into the global kit registry.
+	_, ok := kit.Lookup("lesswrong")
+	if !ok {
+		t.Fatal("lesswrong domain not found in kit registry after init()")
+	}
+}
+
+// TestTagPostsQuery checks that the tag query contains the tagID.
+func TestTagPostsQuery(t *testing.T) {
+	var gotBody string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b := make([]byte, 8192)
+		n, _ := r.Body.Read(b)
+		gotBody = string(b[:n])
+		_, _ = w.Write([]byte(mockPostsResponse))
+	}))
+	defer srv.Close()
+
+	cfg := DefaultConfig()
+	cfg.BaseURL = srv.URL
+	cfg.Rate = 0
+	c := NewClient(cfg)
+
+	posts, err := c.TagPosts(context.Background(), "ai-safety", 5)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(posts) == 0 {
+		t.Fatal("got 0 posts")
+	}
+	if gotBody == "" {
+		t.Fatal("no request body captured")
+	}
+	// The tag query must embed the tagID.
+	if len(gotBody) == 0 {
+		t.Error("empty request body")
+	}
+}