wip: peer discovery

See https://git.vvvvvvaria.org/varia/go-sh-manymanuals/issues/8

go.mod

@@ -9,7 +9,8 @@ require (
 	github.com/johbar/go-poppler v0.0.0-20221016201615-2d089fcde50c
 	github.com/rkoesters/xdg v0.0.1
 	github.com/sahilm/fuzzy v0.1.0
-	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
+	github.com/schollz/peerdiscovery v1.7.0
+	golang.org/x/term v0.3.0
 )
 
 require (
@@ -26,6 +27,7 @@ require (
 	github.com/muesli/termenv v0.13.0 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/ungerik/go-cairo v0.0.0-20220815093914-e24bd4259cef // indirect
-	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab // indirect
-	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/net v0.4.0 // indirect
+	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
 )

go.sum

@@ -11,6 +11,8 @@ github.com/charmbracelet/lipgloss v0.6.0 h1:1StyZB9vBSOyuZxQUcUwGr17JmojPNm87ini
 github.com/charmbracelet/lipgloss v0.6.0/go.mod h1:tHh2wr34xcHjC2HCXIlGSG1jaDF0S0atAUvBMP6Ppuk=
 github.com/containerd/console v1.0.3 h1:lIr7SlA5PxZyMV30bDW0MGbiOPXwc63yRuCP0ARubLw=
 github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/johbar/go-poppler v0.0.0-20221016201615-2d089fcde50c h1:Tx0rgi0AplSV3N5wrZK7EC8dtNPZOGuyG+ioTp2dTn8=
 github.com/johbar/go-poppler v0.0.0-20221016201615-2d089fcde50c/go.mod h1:8d4ecx/m9sNgc36I9FHwFQxQVnqPq5GXpjdlts87Sh0=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
@@ -37,6 +39,8 @@ github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKt
 github.com/muesli/termenv v0.11.1-0.20220204035834-5ac8409525e0/go.mod h1:Bd5NYQ7pd+SrtBSrSNoBBmXlcY8+Xj4BMJgh8qcZrvs=
 github.com/muesli/termenv v0.13.0 h1:wK20DRpJdDX8b7Ek2QfhvqhRQFZ237RGRO0RQ/Iqdy0=
 github.com/muesli/termenv v0.13.0/go.mod h1:sP1+uffeLaEYpyOTb8pLCUctGcGLnoFjSn4YJK5e2bc=
+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/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
@@ -44,16 +48,48 @@ github.com/rkoesters/xdg v0.0.1 h1:RmfYxghVvIsb4d51u5LtNOcwqY5r3P44u6o86qqvBMA=
 github.com/rkoesters/xdg v0.0.1/go.mod h1:5DcbjvJkY00fIOKkaBnylbC/rmc1NNJP5dmUcnlcm7U=
 github.com/sahilm/fuzzy v0.1.0 h1:FzWGaw2Opqyu+794ZQ9SYifWv2EIXpwP4q8dY1kDAwI=
 github.com/sahilm/fuzzy v0.1.0/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
+github.com/schollz/peerdiscovery v1.7.0 h1:JVOl8d39AsGFH5cN6Bs5uCy/puADoG/32wI3zjU/3EM=
+github.com/schollz/peerdiscovery v1.7.0/go.mod h1:BouGdURKIFl7OGez+2lyZJKD+2tBQ2Mv3vtetie0H6A=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/ungerik/go-cairo v0.0.0-20220815093914-e24bd4259cef h1:zpOobzu7pmkVFs/XNuhJvxHCdQrGWxybcfVDabi//B4=
 github.com/ungerik/go-cairo v0.0.0-20220815093914-e24bd4259cef/go.mod h1:yLTJg56omDJ+JVxZ5whpCrZgQdaSs+OBdFa+X6ViJcI=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.4.0 h1:Q5QPcMlvfxFTAPV0+07Xz/MpK9NTXu2VDUuy0FeMfaU=
+golang.org/x/net v0.4.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220204135822-1c1b9b1eba6a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab h1:2QkjZIsXupsJbJIdSjjUOgWK3aEtzyuh2mPt3l/CkeU=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
+golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
+golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/term v0.3.0 h1:qoo4akIqOcDME5bhc/NgxUdovd6BSS2uMsVjB56q1xI=
+golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
+golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

gshmm.go

@@ -17,6 +17,7 @@ import (
 	pdf "github.com/johbar/go-poppler"
 	"github.com/rkoesters/xdg"
 	"github.com/sahilm/fuzzy"
+	"github.com/schollz/peerdiscovery"
 	"golang.org/x/term"
 )
 
@@ -84,6 +85,8 @@ type model struct {
 
 	indexSpinner spinner.Model // Spinner to show that content indexes are being loaded
 	querySpinner spinner.Model // Spinner to show that content is being queried
+
+	peers []peerdiscovery.Discovered // LAN peers
 }
 
 // datasheetFromName retrieves a datasheet via a name.
@@ -105,6 +108,14 @@ func (m *model) toggleFilterMode() {
 	}
 }
 
+func (m model) peerAddresses() []string {
+	var ps []string
+	for _, p := range m.peers {
+		ps = append(ps, p.Address)
+	}
+	return ps
+}
+
 // datasheet represents a datasheet on disk.
 type datasheet struct {
 	filename string // The name of the file
@@ -157,8 +168,27 @@ func initialModel(width int, height int) model {
 
 // loadedDatasheetsMsg signals to the UI that the datasheets have been loaded.
 type loadedDatasheetsMsg struct {
-	datasheets     []datasheet
-	datasheetNames []string
+	datasheets     []datasheet // Datasheets
+	datasheetNames []string    // Filenames of all datasheets
+}
+
+// peerDiscoveredMsg signals to the UI that a peer was discovered.
+type peerDiscoveredMsg struct {
+	discovered []peerdiscovery.Discovered // Discovered peers
+}
+
+// discoverPeers discovers LAN peers
+func discoverPeers(m model) peerDiscoveredMsg {
+	var discovered []peerdiscovery.Discovered
+
+	// TODO: handle this error
+	discoveries, _ := peerdiscovery.Discover()
+	for _, discovery := range discoveries {
+		log.Printf("peer discovered: %s", discovery)
+		discovered = append(discovered, discovery)
+	}
+
+	return peerDiscoveredMsg{discovered: discovered}
 }
 
 // loadDatasheets loads the datasheets from disk. The UI shows a spinner while
@@ -207,6 +237,7 @@ func loadDatasheets(m model) loadedDatasheetsMsg {
 func (m model) Init() tea.Cmd {
 	return tea.Batch(
 		func() tea.Msg { return loadDatasheets(m) },
+		func() tea.Msg { return discoverPeers(m) },
 		textinput.Blink,
 		m.loadDatasheetSpinner.Tick,
 	)
@@ -285,6 +316,9 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.datasheetViewport.SetContent(selectedDatasheet.contents)
 
 		m.datasheetsLoaded = true
+	case peerDiscoveredMsg:
+		m.peers = msg.discovered
+		cmds = append(cmds, func() tea.Msg { return discoverPeers(m) })
 	case tea.WindowSizeMsg:
 		// TODO: handle terminal resizing
 		//       resize listing / viewport
@@ -339,6 +373,9 @@ func (m model) View() string {
 	help := "[ctrl-c]: quit | [tab]: filter mode | [o]: open"
 	body.WriteString("\n" + help)
 
+	peers := fmt.Sprintf("peers: %s", strings.Join(m.peerAddresses(), "|"))
+	body.WriteString("\n" + peers)
+
 	return body.String()
 }