code wiki / _hdl_build / nx_web_render.nx
`nx_web_render.nx` source

1// nx_web_render.nx -- LIB: the WEB domain CONSUMER for the Nishi builder. Resolves web components from the
2// universal catalog by id and substitutes {KEY} bindings into live, sovereign HTML (no JS, no external fetch),
3// and composes a full page from several components. Closes the web loop: build -> teach -> grow -> CONSUME.
4// Boundary defense (rule 12): binding VALUES are HTML-escaped, so page data can't inject markup. license_tier: ORIGINAL
5import "nx_nishi_builder.nx"
6import "nx_ad_serve.nx"
7import "nx_syscalls.nx"
8
9// 1 if hay[i..] == key followed by '='.
10func nw_keyeq(hay: *u8, i: i64, key: *u8) -> i64 {
11    var j: i64 = 0
12    while key[j] != (0 as u8) { if hay[i+j] != key[j] { return 0 } j = j + 1 }
13    if hay[i+j] != (61 as u8) { return 0 }
14    return 1
15}
16// look up KEY in a "k1=v1|k2=v2|..." bindings string -> out (value until '|' or end). 1 found, 0 not.
17func nw_bind_get(bindings: *u8, key: *u8, out: *u8, cap: i64) -> i64 {
18    let kl: i64 = as_len(key)
19    var i: i64 = 0; var run: i64 = 1; var found: i64 = 0
20    while run == 1 {
21        if bindings[i] == (0 as u8) { run = 0 } else {
22            var boundary: i64 = 0
23            if i == 0 { boundary = 1 } else { if bindings[i-1] == (124 as u8) { boundary = 1 } }
24            if boundary == 1 { if nw_keyeq(bindings, i, key) == 1 {
25                var j: i64 = i + kl + 1; var o: i64 = 0; var vr: i64 = 1
26                while vr == 1 { if bindings[j] == (0 as u8) { vr = 0 } else { if bindings[j] == (124 as u8) { vr = 0 } else { if o < cap - 1 { out[o] = bindings[j]; o = o + 1 } j = j + 1 } } }
27                out[o] = 0 as u8; found = 1; run = 0
28            } }
29            i = i + 1
30        }
31    }
32    return found
33}
34// append a template to out, substituting {KEY} -> binding value (unknown keys drop). returns new off.
35func nw_render(out: *u8, off: i64, tpl: *u8, bindings: *u8) -> i64 {
36    var o: i64 = off; var i: i64 = 0
37    while tpl[i] != (0 as u8) {
38        var handled: i64 = 0
39        if tpl[i] == (123 as u8) {
40            var k: i64 = i + 1; var close: i64 = 0 - 1; var sc: i64 = 1
41            while sc == 1 { if tpl[k] == (0 as u8) { sc = 0 } else { if tpl[k] == (125 as u8) { close = k; sc = 0 } else { k = k + 1 } } }
42            if close >= 0 {
43                let key: *u8 = sys_mmap(64); var ko: i64 = 0; var p: i64 = i + 1
44                while p < close { if ko < 63 { key[ko] = tpl[p]; ko = ko + 1 } p = p + 1 } key[ko] = 0 as u8
45                let val: *u8 = sys_mmap(1024)
46                if nw_bind_get(bindings, key, val, 1024) == 1 { o = as_append(out, o, val) }
47                i = close + 1; handled = 1
48            }
49        }
50        if handled == 0 { out[o] = tpl[i]; o = o + 1; i = i + 1 }
51    }
52    return o
53}
54// resolve a web component (kind,id) from the catalog at `path` and render with `bindings` into out at off.
55func nw_emit_component(path: *u8, kind: *u8, id: *u8, bindings: *u8, out: *u8, off: i64) -> i64 {
56    let tpl: *u8 = sys_mmap(4096)
57    if nb_lookup(path, "web" as *u8, kind, id, tpl) == 0 { return off }
58    return nw_render(out, off, tpl, bindings)
59}
60// add "KEY=<escaped val>|" to a bindings buffer. (Boundary defense: value is HTML-escaped.)
61func nw_bind_add(buf: *u8, off: i64, key: *u8, val: *u8) -> i64 {
62    var o: i64 = as_append(buf, off, key); buf[o] = 61 as u8; o = o + 1
63    o = as_append_escaped(buf, o, val, as_len(val)); buf[o] = 124 as u8; o = o + 1
64    return o
65}
66
67// compose a full page from catalog components (nav + hero + footer). NUL-terminated into out; returns length.
68func nw_emit_page(path: *u8, brand: *u8, title: *u8, sub: *u8, cta: *u8, link: *u8, copyr: *u8, out: *u8) -> i64 {
69    var o: i64 = 0
70    o = as_append(out, o, "<!doctype html><html><head><meta charset='utf-8'><meta name='viewport' content='width=device-width,initial-scale=1'><title>" as *u8)
71    o = as_append_escaped(out, o, title, as_len(title))
72    o = as_append(out, o, "</title><style>body{margin:0;font-family:system-ui,sans-serif;color:#16202e}.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:#0b2545;color:#fff}.topbar .brand{color:#fff;text-decoration:none;font-weight:700}.topbar .links a{color:#cfe;margin-left:16px;text-decoration:none}.hero{padding:64px 24px;text-align:center;background:#eef2f7}.hero h1{font-size:2rem;margin:0 0 8px}.btn{display:inline-block;margin-top:16px;padding:12px 22px;background:#0b2545;color:#fff;border-radius:8px;text-decoration:none}.ftr{padding:28px 24px;background:#0b2545;color:#cfe;text-align:center}.ftr nav a{color:#fff;margin:0 8px}</style></head><body>" as *u8)
73    let nb1: *u8 = sys_mmap(512); var b: i64 = nw_bind_add(nb1, 0, "BRAND" as *u8, brand); b = nw_bind_add(nb1, b, "LINKS" as *u8, "Home" as *u8); nb1[b] = 0 as u8
74    o = nw_emit_component(path, "nav" as *u8, "topbar" as *u8, nb1, out, o)
75    let nb2: *u8 = sys_mmap(1024); b = nw_bind_add(nb2, 0, "TITLE" as *u8, title); b = nw_bind_add(nb2, b, "SUB" as *u8, sub); b = nw_bind_add(nb2, b, "LINK" as *u8, link); b = nw_bind_add(nb2, b, "CTA" as *u8, cta); nb2[b] = 0 as u8
76    o = nw_emit_component(path, "section" as *u8, "hero" as *u8, nb2, out, o)
77    let nb3: *u8 = sys_mmap(512); b = nw_bind_add(nb3, 0, "COPY" as *u8, copyr); b = nw_bind_add(nb3, b, "LINKS" as *u8, "Privacy" as *u8); nb3[b] = 0 as u8
78    o = nw_emit_component(path, "section" as *u8, "footer" as *u8, nb3, out, o)
79    o = as_append(out, o, "</body></html>" as *u8)
80    out[o] = 0 as u8
81    return o
82}
nx_web_render.nx source

`nx_web_render.nx` source
