Realm

1package gallery
2
3import (
4	"gno.land/r/moul/demo/gnoface/v0"
5	"gno.land/r/moul/demo/millipede/v0"
6	"gno.land/r/moul/sapin/v0"
7)
8
9// piece is one entry in the index.
10//
11// The gallery stores no art. Every piece lives in somebody's realm and this is
12// a pointer to it, which is why there is no package-level state anywhere in
13// this realm and nothing here survives or needs to survive a redeploy.
14type piece struct {
15	Slug    string
16	Title   string
17	Author  string
18	Origin  string // realm path, without the gno.land prefix
19	License string
20	Note    string
21
22	// Draw renders the piece live, by importing its source. It is nil when the
23	// source cannot be imported, which is the honest half of a curated index:
24	// a private realm or a package this repo has not vendored can be pointed
25	// at but not shown.
26	Draw func() string
27}
28
29// Live reports whether this realm can render the piece itself.
30func (p piece) Live() bool { return p.Draw != nil }
31
32// catalog is built per call rather than held in a package-level var: a func
33// value is not something to persist, and a realm that stores nothing should
34// not be paying storage for its own index.
35func catalog() []piece {
36	return []piece{
37		{
38			Slug:    "gnoface",
39			Title:   "gnoface",
40			Author:  "moul",
41			Origin:  "r/moul/demo/gnoface/v0",
42			License: "see the source realm",
43			Note:    "A face generated from a seed. Every seed is a different face, and none of them are stored.",
44			Draw:    func() string { return gnoface.Draw(42) },
45		},
46		{
47			Slug:    "millipede",
48			Title:   "millipede",
49			Author:  "moul",
50			Origin:  "r/moul/demo/millipede/v0",
51			License: "see the source realm",
52			Note:    "A millipede of any length. The oldest piece here, and still the one that best explains why ASCII is the cheapest picture there is.",
53			Draw:    func() string { return millipede.Draw(8) },
54		},
55		{
56			Slug:    "sapin",
57			Title:   "sapin",
58			Author:  "moul",
59			Origin:  "r/moul/sapin/v0",
60			License: "see the source realm",
61			Note:    "A fir tree, sized on request.",
62			Draw:    func() string { return sapin.Sapin(6) },
63		},
64		{
65			Slug:    "settler25",
66			Title:   "Settler #25",
67			Author:  "the Settlers",
68			Origin:  "r/g17khqpukees4237dtn3astzapmp462vjhsz6st4/settlers/nft",
69			License: "CC0 1.0",
70			Note:    "moul's, soulbound, minted at block 409242. A 32x32 indexed sprite with 20 colours, which is what made it the test case for p/moul/art: a luminance ramp resolves those 20 to 9, and keying on the palette index keeps all 20.",
71		},
72		{
73			Slug:    "asciiart",
74			Title:   "asciiart",
75			Author:  "moul",
76			Origin:  "r/moul/x/daily/asciiart/v1",
77			License: "see the source realm",
78			Note:    "Patterns from short deterministic algorithms, plus everyone's generations. Declared private = true, so it can be linked but never imported: that is the constraint, not an omission.",
79		},
80		{
81			Slug:    "pixelcanvas",
82			Title:   "pixelcanvas",
83			Author:  "moul",
84			Origin:  "r/moul/x/daily/pixelcanvas/v0",
85			License: "see the source realm",
86			Note:    "A shared grid anyone can paint one pixel of.",
87		},
88	}
89}
90
91func find(slug string) (piece, bool) {
92	for _, p := range catalog() {
93		if p.Slug == slug {
94			return p, true
95		}
96	}
97	return piece{}, false
98}
99