Overhaul the sgf representation

Cargo.lock

@@ -19,9 +19,9 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "aho-corasick"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6748e8def348ed4d14996fa801f4122cd763fff530258cdc03f64b25f89d3a5a"
+checksum = "0c378d78423fdad8089616f827526ee33c19f2fddbd5de1629152c9593ba4783"
 dependencies = [
  "memchr",
 ]
@@ -70,9 +70,9 @@ dependencies = [
 
 [[package]]
 name = "base64"
-version = "0.21.2"
+version = "0.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
+checksum = "414dcefbc63d77c526a76b3afcf6fbb9b5e2791c19c3aa2297733208750c6e53"
 
 [[package]]
 name = "bit-set"
@@ -139,7 +139,7 @@ checksum = "ab3603c4028a5e368d09b51c8b624b9a46edcd7c3778284077a6125af73c9f0a"
 dependencies = [
  "bitflags 1.3.2",
  "cairo-sys-rs",
- "glib",
+ "glib 0.17.10",
  "libc",
  "once_cell",
  "thiserror",
@@ -151,7 +151,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "691d0c66b1fb4881be80a760cb8fe76ea97218312f9dfe2c9cc0f496ca279cb1"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.17.10",
  "libc",
  "system-deps",
 ]
@@ -190,9 +190,9 @@ dependencies = [
 
 [[package]]
 name = "chrono"
-version = "0.4.26"
+version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec837a71355b28f6556dbd569b37b3f363091c0bd4b2e735674521b4c5fd9bc5"
+checksum = "f56b4c72906975ca04becb8a30e102dfecddd0c06181e3e95ddc444be28881f8"
 dependencies = [
  "android-tzdata",
  "iana-time-zone",
@@ -201,7 +201,7 @@ dependencies = [
  "serde",
  "time",
  "wasm-bindgen",
- "winapi",
+ "windows-targets",
 ]
 
 [[package]]
@@ -349,8 +349,8 @@ name = "cyberpunk-splash"
 version = "0.1.0"
 dependencies = [
  "cairo-rs",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "gtk4",
 ]
 
@@ -365,8 +365,8 @@ dependencies = [
  "futures",
  "gdk4",
  "geo-types",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "glib-build-tools 0.16.3",
  "gtk4",
  "ifc",
@@ -442,9 +442,9 @@ checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
 name = "errno"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b30f669a7961ef1631673d2766cc92f52d64f7ef354d4fe0ddfd30ed52f0f4f"
+checksum = "136526188508e25c6fef639d7927dfb3e0e3084488bf202267829cf7fc23dbdd"
 dependencies = [
  "errno-dragonfly",
  "libc",
@@ -713,8 +713,8 @@ checksum = "695d6bc846438c5708b07007537b9274d883373dd30858ca881d7d71b5540717"
 dependencies = [
  "bitflags 1.3.2",
  "gdk-pixbuf-sys",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "libc",
  "once_cell",
 ]
@@ -725,9 +725,9 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9285ec3c113c66d7d0ab5676599176f1f42f4944ca1b581852215bf5694870cb"
 dependencies = [
- "gio-sys",
+ "gio-sys 0.17.10",
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
  "libc",
  "system-deps",
 ]
@@ -742,10 +742,10 @@ dependencies = [
  "cairo-rs",
  "gdk-pixbuf",
  "gdk4-sys",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "libc",
- "pango",
+ "pango 0.17.10",
 ]
 
 [[package]]
@@ -756,11 +756,11 @@ checksum = "1bc92aa1608c089c49393d014c38ac0390d01e4841e1fedaa75dbcef77aaed64"
 dependencies = [
  "cairo-sys-rs",
  "gdk-pixbuf-sys",
- "gio-sys",
+ "gio-sys 0.17.10",
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
  "libc",
- "pango-sys",
+ "pango-sys 0.17.10",
  "pkg-config",
  "system-deps",
 ]
@@ -818,8 +818,27 @@ dependencies = [
  "futures-core",
  "futures-io",
  "futures-util",
- "gio-sys",
+ "gio-sys 0.17.10",
- "glib",
+ "glib 0.17.10",
+ "libc",
+ "once_cell",
+ "pin-project-lite",
+ "smallvec",
+ "thiserror",
+]
+
+[[package]]
+name = "gio"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7884cba6b1c5db1607d970cadf44b14a43913d42bc68766eea6a5e2fe0891524"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "futures-io",
+ "futures-util",
+ "gio-sys 0.18.1",
+ "glib 0.18.1",
  "libc",
  "once_cell",
  "pin-project-lite",
@@ -833,8 +852,21 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ccf87c30a12c469b6d958950f6a9c09f2be20b7773f7e70d20b867fdf2628c3"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
+ "libc",
+ "system-deps",
+ "winapi",
+]
+
+[[package]]
+name = "gio-sys"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37566df850baf5e4cb0dfb78af2e4b9898d817ed9263d1090a2df958c64737d2"
+dependencies = [
+ "glib-sys 0.18.1",
+ "gobject-sys 0.18.0",
  "libc",
  "system-deps",
  "winapi",
@@ -852,10 +884,33 @@ dependencies = [
  "futures-executor",
  "futures-task",
  "futures-util",
- "gio-sys",
+ "gio-sys 0.17.10",
- "glib-macros",
+ "glib-macros 0.17.10",
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
+ "libc",
+ "memchr",
+ "once_cell",
+ "smallvec",
+ "thiserror",
+]
+
+[[package]]
+name = "glib"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "331156127e8166dd815cf8d2db3a5beb492610c716c03ee6db4f2d07092af0a7"
+dependencies = [
+ "bitflags 2.4.0",
+ "futures-channel",
+ "futures-core",
+ "futures-executor",
+ "futures-task",
+ "futures-util",
+ "gio-sys 0.18.1",
+ "glib-macros 0.18.0",
+ "glib-sys 0.18.1",
+ "gobject-sys 0.18.0",
  "libc",
  "memchr",
  "once_cell",
@@ -890,6 +945,20 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "glib-macros"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "179643c50bf28d20d2f6eacd2531a88f2f5d9747dd0b86b8af1e8bb5dd0de3c0"
+dependencies = [
+ "heck",
+ "proc-macro-crate",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.29",
+]
+
 [[package]]
 name = "glib-sys"
 version = "0.17.10"
@@ -900,6 +969,16 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "glib-sys"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "063ce2eb6a8d0ea93d2bf8ba1957e78dbab6be1c2220dd3daca57d5a9d869898"
+dependencies = [
+ "libc",
+ "system-deps",
+]
+
 [[package]]
 name = "gm-control-panel"
 version = "0.1.0"
@@ -908,8 +987,8 @@ dependencies = [
  "config-derive",
  "futures",
  "gdk4",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "glib-build-tools 0.16.3",
  "gtk4",
  "libadwaita",
@@ -924,7 +1003,18 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cd34c3317740a6358ec04572c1bcfd3ac0b5b6529275fae255b237b314bb8062"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.17.10",
+ "libc",
+ "system-deps",
+]
+
+[[package]]
+name = "gobject-sys"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0850127b514d1c4a4654ead6dedadb18198999985908e6ffe4436f53c785ce44"
+dependencies = [
+ "glib-sys 0.18.1",
  "libc",
  "system-deps",
 ]
@@ -935,7 +1025,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "def4bb01265b59ed548b05455040d272d989b3012c42d4c1bbd39083cb9b40d9"
 dependencies = [
- "glib",
+ "glib 0.17.10",
  "graphene-sys",
  "libc",
 ]
@@ -946,7 +1036,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1856fc817e6a6675e36cea0bd9a3afe296f5d9709d1e2d3182803ac77f0ab21d"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.17.10",
  "libc",
  "pkg-config",
  "system-deps",
@@ -970,11 +1060,11 @@ dependencies = [
  "bitflags 1.3.2",
  "cairo-rs",
  "gdk4",
- "glib",
+ "glib 0.17.10",
  "graphene-rs",
  "gsk4-sys",
  "libc",
- "pango",
+ "pango 0.17.10",
 ]
 
 [[package]]
@@ -985,11 +1075,11 @@ checksum = "c07a84fb4dcf1323d29435aa85e2f5f58bef564342bef06775ec7bd0da1f01b0"
 dependencies = [
  "cairo-sys-rs",
  "gdk4-sys",
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
  "graphene-sys",
  "libc",
- "pango-sys",
+ "pango-sys 0.17.10",
  "system-deps",
 ]
 
@@ -1005,15 +1095,15 @@ dependencies = [
  "futures-channel",
  "gdk-pixbuf",
  "gdk4",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "graphene-rs",
  "gsk4",
  "gtk4-macros",
  "gtk4-sys",
  "libc",
  "once_cell",
- "pango",
+ "pango 0.17.10",
 ]
 
 [[package]]
@@ -1039,13 +1129,13 @@ dependencies = [
  "cairo-sys-rs",
  "gdk-pixbuf-sys",
  "gdk4-sys",
- "gio-sys",
+ "gio-sys 0.17.10",
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
  "graphene-sys",
  "gsk4-sys",
  "libc",
- "pango-sys",
+ "pango-sys 0.17.10",
  "system-deps",
 ]
 
@@ -1107,8 +1197,8 @@ version = "0.1.0"
 dependencies = [
  "cairo-rs",
  "coordinates",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "glib-build-tools 0.16.3",
  "gtk4",
  "image",
@@ -1342,14 +1432,14 @@ name = "kifu-gtk"
 version = "0.1.0"
 dependencies = [
  "cairo-rs",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "glib-build-tools 0.17.10",
  "gtk4",
  "image",
  "kifu-core",
  "libadwaita",
- "pango",
+ "pango 0.18.0",
  "sgf",
  "tokio",
 ]
@@ -1375,12 +1465,12 @@ dependencies = [
  "bitflags 1.3.2",
  "gdk-pixbuf",
  "gdk4",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "gtk4",
  "libadwaita-sys",
  "libc",
- "pango",
+ "pango 0.17.10",
 ]
 
 [[package]]
@@ -1390,12 +1480,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4231cb2499a9f0c4cdfa4885414b33e39901ddcac61150bc0bb4ff8a57ede404"
 dependencies = [
  "gdk4-sys",
- "gio-sys",
+ "gio-sys 0.17.10",
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
  "gtk4-sys",
  "libc",
- "pango-sys",
+ "pango-sys 0.17.10",
  "system-deps",
 ]
 
@@ -1435,9 +1525,9 @@ checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
 
 [[package]]
 name = "memchr"
-version = "2.5.0"
+version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+checksum = "f478948fd84d9f8e86967bf432640e46adfb5a4bd4f14ef7e864ab38220534ae"
 
 [[package]]
 name = "memoffset"
@@ -1593,11 +1683,11 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "openssl"
-version = "0.10.56"
+version = "0.10.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "729b745ad4a5575dd06a3e1af1414bd330ee561c01b3899eb584baeaa8def17e"
+checksum = "bac25ee399abb46215765b1cb35bc0212377e58a061560d8b29b024fd0430e7c"
 dependencies = [
- "bitflags 1.3.2",
+ "bitflags 2.4.0",
  "cfg-if",
  "foreign-types",
  "libc",
@@ -1625,9 +1715,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.91"
+version = "0.9.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "866b5f16f90776b9bb8dc1e1802ac6f0513de3a7a7465867bfbc563dc737faac"
+checksum = "db7e971c2c2bba161b2d2fdf37080177eff520b3bc044787c7f1f5f9e78d869b"
 dependencies = [
  "cc",
  "libc",
@@ -1642,11 +1732,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35be456fc620e61f62dff7ff70fbd54dcbaf0a4b920c0f16de1107c47d921d48"
 dependencies = [
  "bitflags 1.3.2",
- "gio",
+ "gio 0.17.10",
- "glib",
+ "glib 0.17.10",
  "libc",
  "once_cell",
- "pango-sys",
+ "pango-sys 0.17.10",
+]
+
+[[package]]
+name = "pango"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06a9e54b831d033206160096b825f2070cf5fda7e35167b1c01e9e774f9202d1"
+dependencies = [
+ "gio 0.18.1",
+ "glib 0.18.1",
+ "libc",
+ "once_cell",
+ "pango-sys 0.18.0",
 ]
 
 [[package]]
@@ -1655,8 +1758,20 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3da69f9f3850b0d8990d462f8c709561975e95f689c1cdf0fecdebde78b35195"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.17.10",
- "gobject-sys",
+ "gobject-sys 0.17.10",
+ "libc",
+ "system-deps",
+]
+
+[[package]]
+name = "pango-sys"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "436737e391a843e5933d6d9aa102cb126d501e815b83601365a948a518555dc5"
+dependencies = [
+ "glib-sys 0.18.1",
+ "gobject-sys 0.18.0",
  "libc",
  "system-deps",
 ]
@@ -1759,9 +1874,9 @@ dependencies = [
 
 [[package]]
 name = "pin-project-lite"
-version = "0.2.12"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12cc1b0bf1727a77a54b6654e7b5f1af8604923edc8b81885f8ec92f9e3f0a05"
+checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
 
 [[package]]
 name = "pin-utils"
@@ -1953,25 +2068,25 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.9.3"
+version = "1.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81bc1d4caf89fac26a70747fe603c130093b53c773888797a6329091246d651a"
+checksum = "12de2eff854e5fa4b1295edd650e227e9d8fb0c9e90b12e7f36d6a6811791a29"
 dependencies = [
  "aho-corasick",
  "memchr",
  "regex-automata",
- "regex-syntax 0.7.4",
+ "regex-syntax 0.7.5",
 ]
 
 [[package]]
 name = "regex-automata"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fed1ceff11a1dddaee50c9dc8e4938bd106e9d89ae372f192311e7da498e3b69"
+checksum = "49530408a136e16e5b486e883fbb6ba058e8e4e8ae6621a77b048b314336e629"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-syntax 0.7.4",
+ "regex-syntax 0.7.5",
 ]
 
 [[package]]
@@ -1982,9 +2097,9 @@ checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
 [[package]]
 name = "regex-syntax"
-version = "0.7.4"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5ea92a5b6195c6ef2a0295ea818b312502c6fc94dde986c5553242e18fd4ce2"
+checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
 
 [[package]]
 name = "reqwest"
@@ -2046,9 +2161,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.8"
+version = "0.38.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19ed4fa021d81c8392ce04db050a3da9a60299050b7ae1cf482d862b54a7218f"
+checksum = "ed6248e1caa625eb708e266e06159f135e8c26f2bb7ceb72dc4b2766d0340964"
 dependencies = [
  "bitflags 2.4.0",
  "errno",
@@ -2134,18 +2249,18 @@ checksum = "b0293b4b29daaf487284529cc2f5675b8e57c61f70167ba415a463651fd6a918"
 
 [[package]]
 name = "serde"
-version = "1.0.186"
+version = "1.0.188"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f5db24220c009de9bd45e69fb2938f4b6d2df856aa9304ce377b3180f83b7c1"
+checksum = "cf9e0fcba69a370eed61bcf2b728575f726b50b55cba78064753d708ddc7549e"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.186"
+version = "1.0.188"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ad697f7e0b65af4983a4ce8f56ed5b357e8d3c36651bf6a7e13639c17b8e670"
+checksum = "4eca7ac642d82aa35b60049a6eccb4be6be75e599bd2e9adb5f875a737654af2"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2189,6 +2304,7 @@ name = "sgf"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "cool_asserts",
  "nom",
  "serde",
  "thiserror",
@@ -2584,9 +2700,9 @@ dependencies = [
 
 [[package]]
 name = "url"
-version = "2.4.0"
+version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50bff7831e19200a85b17131d085c25d7811bc4e186efdaf54bbd132994a88cb"
+checksum = "143b538f18257fac9cad154828a57c6bf5157e1aa604d4816b5995bf6de87ae5"
 dependencies = [
  "form_urlencoded",
  "idna",

sgf/Cargo.toml

@@ -11,3 +11,6 @@ nom         = { version = "7" }
 serde       = { version = "1", features = [ "derive" ] }
 thiserror   = { version = "1"}
 typeshare   = { version = "1" }
+
+[dev-dependencies]
+cool_asserts    = { version = "2" }

sgf/src/go.rs

@@ -74,6 +74,7 @@ use crate::{
     Error,
 };
 use serde::{Deserialize, Serialize};
+use std::ops::Deref;
 use typeshare::typeshare;
 
 #[derive(Clone, Debug)]
@@ -84,11 +85,18 @@ pub struct Game {
     pub tree: Tree,
 }
 
+impl Deref for Game {
+    type Target = Tree;
+    fn deref(&self) -> &Self::Target {
+        &self.tree
+    }
+}
+
 impl TryFrom<Tree> for Game {
     type Error = Error;
 
     fn try_from(tree: Tree) -> Result<Self, Self::Error> {
-        let board_size = match tree.sequence[0].find_prop("SZ") {
+        let board_size = match tree.root.find_prop("SZ") {
             Some(prop) => Size::try_from(prop.values[0].as_str())?,
             None => Size {
                 width: 19,
@@ -96,40 +104,37 @@ impl TryFrom<Tree> for Game {
             },
         };
         let mut info = GameInfo::default();
-        info.app_name = tree.sequence[0]
+        info.app_name = tree.root.find_prop("AP").map(|prop| prop.values[0].clone());
-            .find_prop("AP")
-            .map(|prop| prop.values[0].clone());
 
-        info.game_name = tree.sequence[0]
+        info.game_name = tree.root.find_prop("GN").map(|prop| prop.values[0].clone());
-            .find_prop("GN")
-            .map(|prop| prop.values[0].clone());
 
-        info.black_player = tree.sequence[0]
+        info.black_player = tree.root.find_prop("PB").map(|prop| prop.values.join(", "));
-            .find_prop("PB")
-            .map(|prop| prop.values.join(", "));
 
-        info.black_rank = tree.sequence[0]
+        info.black_rank = tree
+            .root
             .find_prop("BR")
             .and_then(|prop| Rank::try_from(prop.values[0].as_str()).ok());
 
-        info.white_player = tree.sequence[0]
+        info.white_player = tree.root.find_prop("PW").map(|prop| prop.values.join(", "));
-            .find_prop("PW")
-            .map(|prop| prop.values.join(", "));
 
-        info.white_rank = tree.sequence[0]
+        info.white_rank = tree
+            .root
             .find_prop("WR")
             .and_then(|prop| Rank::try_from(prop.values[0].as_str()).ok());
 
-        info.result = tree.sequence[0]
+        info.result = tree
+            .root
             .find_prop("RE")
             .and_then(|prop| GameResult::try_from(prop.values[0].as_str()).ok());
 
-        info.time_limits = tree.sequence[0]
+        info.time_limits = tree
+            .root
             .find_prop("TM")
             .and_then(|prop| prop.values[0].parse::<u64>().ok())
             .and_then(|seconds| Some(std::time::Duration::from_secs(seconds)));
 
-        info.date = tree.sequence[0]
+        info.date = tree
+            .root
             .find_prop("DT")
             .and_then(|prop| {
                 let v = prop
@@ -149,21 +154,13 @@ impl TryFrom<Tree> for Game {
             })
             .unwrap_or(vec![]);
 
-        info.event = tree.sequence[0]
+        info.event = tree.root.find_prop("EV").map(|prop| prop.values.join(", "));
-            .find_prop("EV")
-            .map(|prop| prop.values.join(", "));
 
-        info.round = tree.sequence[0]
+        info.round = tree.root.find_prop("RO").map(|prop| prop.values.join(", "));
-            .find_prop("RO")
-            .map(|prop| prop.values.join(", "));
 
-        info.source = tree.sequence[0]
+        info.source = tree.root.find_prop("SO").map(|prop| prop.values.join(", "));
-            .find_prop("SO")
-            .map(|prop| prop.values.join(", "));
 
-        info.game_keeper = tree.sequence[0]
+        info.game_keeper = tree.root.find_prop("US").map(|prop| prop.values.join(", "));
-            .find_prop("US")
-            .map(|prop| prop.values.join(", "));
 
         Ok(Game {
             board_size,
@@ -307,7 +304,7 @@ mod tests {
     use super::*;
     use crate::{
         date::Date,
-        tree::{parse_collection, Size},
+        tree::{parse_collection, Property, Size},
     };
     use std::fs::File;
     use std::io::Read;
@@ -390,4 +387,123 @@ mod tests {
             assert_eq!(tree.info.game_keeper, Some("Arno Hollosi".to_owned()));
         });
     }
+
+    #[test]
+    fn it_presents_the_mainline_of_game_without_branches() {
+        with_file(
+            std::path::Path::new("test_data/2020 USGO DDK, Round 1.sgf"),
+            |trees| {
+                assert_eq!(trees.len(), 1);
+                let tree = &trees[0];
+
+                let node = &tree.root;
+                assert_eq!(node.properties.len(), 16);
+                let expected_properties = vec![
+                    Property {
+                        ident: "GM".to_owned(),
+                        values: vec!["1".to_owned()],
+                    },
+                    Property {
+                        ident: "FF".to_owned(),
+                        values: vec!["4".to_owned()],
+                    },
+                    Property {
+                        ident: "CA".to_owned(),
+                        values: vec!["UTF-8".to_owned()],
+                    },
+                    Property {
+                        ident: "AP".to_owned(),
+                        values: vec!["CGoban:3".to_owned()],
+                    },
+                    Property {
+                        ident: "ST".to_owned(),
+                        values: vec!["2".to_owned()],
+                    },
+                    Property {
+                        ident: "RU".to_owned(),
+                        values: vec!["AGA".to_owned()],
+                    },
+                    Property {
+                        ident: "SZ".to_owned(),
+                        values: vec!["19".to_owned()],
+                    },
+                    Property {
+                        ident: "KM".to_owned(),
+                        values: vec!["7.50".to_owned()],
+                    },
+                    Property {
+                        ident: "TM".to_owned(),
+                        values: vec!["1800".to_owned()],
+                    },
+                    Property {
+                        ident: "OT".to_owned(),
+                        values: vec!["5x30 byo-yomi".to_owned()],
+                    },
+                    Property {
+                        ident: "PW".to_owned(),
+                        values: vec!["Geckoz".to_owned()],
+                    },
+                    Property {
+                        ident: "PB".to_owned(),
+                        values: vec!["savanni".to_owned()],
+                    },
+                    Property {
+                        ident: "BR".to_owned(),
+                        values: vec!["23k".to_owned()],
+                    },
+                    Property {
+                        ident: "DT".to_owned(),
+                        values: vec!["2020-08-05".to_owned()],
+                    },
+                    Property {
+                        ident: "PC".to_owned(),
+                        values: vec!["The KGS Go Server at http://www.gokgs.com/".to_owned()],
+                    },
+                    Property {
+                        ident: "RE".to_owned(),
+                        values: vec!["W+17.50".to_owned()],
+                    },
+                ];
+
+                for i in 0..16 {
+                    assert_eq!(node.properties[i], expected_properties[i]);
+                }
+
+                let node = node.next().unwrap();
+                let expected_properties = vec![
+                    Property {
+                        ident: "B".to_owned(),
+                        values: vec!["pp".to_owned()],
+                    },
+                    Property {
+                        ident: "BL".to_owned(),
+                        values: vec!["1795.449".to_owned()],
+                    },
+                    Property {
+                        ident: "C".to_owned(),
+                        values: vec!["Geckoz [?]: Good game\nsavanni [23k?]: There we go! This UI is... tough.\nsavanni [23k?]: Have fun! Talk to you at the end.\nGeckoz [?]: Yeah, OGS is much better; I'm a UX professional\n".to_owned()],
+                    }
+                ];
+
+                for i in 0..3 {
+                    assert_eq!(node.properties[i], expected_properties[i]);
+                }
+
+                let node = node.next().unwrap();
+                let expected_properties = vec![
+                    Property {
+                        ident: "W".to_owned(),
+                        values: vec!["dp".to_owned()],
+                    },
+                    Property {
+                        ident: "WL".to_owned(),
+                        values: vec!["1765.099".to_owned()],
+                    },
+                ];
+                for i in 0..2 {
+                    assert_eq!(node.properties[i], expected_properties[i]);
+                }
+            },
+        );
+    }
 }

sgf/src/lib.rs

@@ -65,7 +65,7 @@ pub fn parse_sgf(input: &str) -> Result<Vec<Game>, Error> {
     let (_, trees) = parse_collection::<nom::error::VerboseError<&str>>(input)?;
     Ok(trees
         .into_iter()
-        .map(|t| match t.sequence[0].find_prop("GM") {
+        .map(|t| match t.root.find_prop("GM") {
             Some(prop) if prop.values == vec!["1".to_owned()] => {
                 Game::Go(go::Game::try_from(t).expect("properly structured game tree"))
             }

sgf/src/tree.rs

@@ -5,7 +5,6 @@ use nom::{
     character::complete::{alpha1, digit1, multispace0, multispace1, none_of},
     combinator::{opt, value},
     multi::{many0, many1, separated_list1},
-    sequence::delimited,
     IResult,
 };
 use std::num::ParseIntError;
@@ -54,29 +53,19 @@ impl TryFrom<&str> for Size {
 
 #[derive(Clone, Debug, PartialEq)]
 pub struct Tree {
-    pub sequence: Vec<Node>,
+    pub root: Node,
-    pub sub_sequences: Vec<Tree>,
 }
 
 impl ToString for Tree {
     fn to_string(&self) -> String {
-        let sequence = self
+        format!("({})", self.root.to_string())
-            .sequence
-            .iter()
-            .map(|node| node.to_string())
-            .collect::<String>();
-        let subsequences = self
-            .sub_sequences
-            .iter()
-            .map(|seq| seq.to_string())
-            .collect::<String>();
-        format!("({}{})", sequence, subsequences)
     }
 }
 
 #[derive(Clone, Debug, PartialEq)]
 pub struct Node {
     pub properties: Vec<Property>,
+    pub next: Vec<Node>,
 }
 
 impl ToString for Node {
@@ -86,7 +75,21 @@ impl ToString for Node {
             .iter()
             .map(|prop| prop.to_string())
             .collect::<String>();
-        format!(";{}", props)
+
+        let next = if self.next.len() == 1 {
+            self.next
+                .iter()
+                .map(|node| node.to_string())
+                .collect::<Vec<String>>()
+                .join("")
+        } else {
+            self.next
+                .iter()
+                .map(|node| format!("({})", node.to_string()))
+                .collect::<Vec<String>>()
+                .join("")
+        };
+        format!(";{}{}", props, next)
     }
 }
 
@@ -97,6 +100,10 @@ impl Node {
             .find(|prop| prop.ident == ident)
             .cloned()
     }
+
+    pub fn next<'a>(&'a self) -> Option<&'a Node> {
+        self.next.get(0)
+    }
 }
 
 #[derive(Clone, Debug, PartialEq)]
@@ -119,40 +126,40 @@ impl ToString for Property {
 pub fn parse_collection<'a, E: nom::error::ParseError<&'a str>>(
     input: &'a str,
 ) -> IResult<&'a str, Vec<Tree>, E> {
-    separated_list1(multispace1, parse_tree)(input)
+    let (input, roots) = separated_list1(multispace1, parse_tree)(input)?;
+    let trees = roots
+        .into_iter()
+        .map(|root| Tree { root })
+        .collect::<Vec<Tree>>();
+
+    Ok((input, trees))
 }
 
 // note: must preserve unknown properties
 // note: must fix or preserve illegally formatted game-info properties
 // note: must correct or delete illegally foramtted properties, but display a warning
-fn parse_tree<'a, E: nom::error::ParseError<&'a str>>(input: &'a str) -> IResult<&'a str, Tree, E> {
+fn parse_tree<'a, E: nom::error::ParseError<&'a str>>(input: &'a str) -> IResult<&'a str, Node, E> {
     let (input, _) = multispace0(input)?;
-    delimited(tag("("), parse_sequence, tag(")"))(input)
+    let (input, _) = tag("(")(input)?;
-}
+    let (input, node) = parse_node(input)?;
+    let (input, _) = multispace0(input)?;
+    let (input, _) = tag(")")(input)?;
 
-fn parse_sequence<'a, E: nom::error::ParseError<&'a str>>(
+    Ok((input, node))
-    input: &'a str,
-) -> IResult<&'a str, Tree, E> {
-    let (input, _) = multispace0(input)?;
-    let (input, nodes) = many1(parse_node)(input)?;
-    let (input, _) = multispace0(input)?;
-    let (input, sub_sequences) = many0(parse_tree)(input)?;
-    let (input, _) = multispace0(input)?;
-
-    Ok((
-        input,
-        Tree {
-            sequence: nodes,
-            sub_sequences,
-        },
-    ))
 }
 
 fn parse_node<'a, E: nom::error::ParseError<&'a str>>(input: &'a str) -> IResult<&'a str, Node, E> {
     let (input, _) = multispace0(input)?;
-    let (input, _) = tag(";")(input)?;
+    let (input, _) = opt(tag(";"))(input)?;
     let (input, properties) = many1(parse_property)(input)?;
-    Ok((input, Node { properties }))
+
+    let (input, next) = opt(parse_node)(input)?;
+    let (input, mut next_seq) = many0(parse_tree)(input)?;
+
+    let mut next = next.map(|n| vec![n]).unwrap_or(vec![]);
+    next.append(&mut next_seq);
+
+    Ok((input, Node { properties, next }))
 }
 
 fn parse_property<'a, E: nom::error::ParseError<&'a str>>(
@@ -219,8 +226,6 @@ pub fn parse_size<'a, E: nom::error::ParseError<&'a str>>(
 
 #[cfg(test)]
 mod test {
-    use std::{fs::File, io::Read};
-
     use super::*;
 
     const EXAMPLE: &'static str = "(;FF[4]C[root](;C[a];C[b](;C[c])
@@ -259,7 +264,8 @@ mod test {
                 properties: vec![Property {
                     ident: "B".to_owned(),
                     values: vec!["ab".to_owned()]
-                }]
+                }],
+                next: vec![]
             }
         );
 
@@ -273,6 +279,25 @@ mod test {
                 properties: vec![Property {
                     ident: "B".to_owned(),
                     values: vec!["ab".to_owned()]
+                }],
+                next: vec![Node {
+                    properties: vec![Property {
+                        ident: "W".to_owned(),
+                        values: vec!["dp".to_owned()]
+                    }],
+                    next: vec![Node {
+                        properties: vec![
+                            Property {
+                                ident: "B".to_owned(),
+                                values: vec!["pq".to_owned()]
+                            },
+                            Property {
+                                ident: "C".to_owned(),
+                                values: vec!["some comments".to_owned()]
+                            }
+                        ],
+                        next: vec![],
+                    }]
                 }]
             }
         );
@@ -286,21 +311,17 @@ mod test {
 
         assert_eq!(
             sequence,
-            Tree {
+            Node {
-                sequence: vec![
+                properties: vec![Property {
-                    Node {
+                    ident: "B".to_owned(),
-                        properties: vec![Property {
+                    values: vec!["ab".to_owned()]
-                            ident: "B".to_owned(),
+                }],
-                            values: vec!["ab".to_owned()]
+                next: vec![Node {
-                        }]
+                    properties: vec![Property {
-                    },
+                        ident: "W".to_owned(),
-                    Node {
+                        values: vec!["dp".to_owned()]
-                        properties: vec![Property {
+                    }],
-                            ident: "W".to_owned(),
+                    next: vec![Node {
-                            values: vec!["dp".to_owned()]
-                        }]
-                    },
-                    Node {
                         properties: vec![
                             Property {
                                 ident: "B".to_owned(),
@@ -310,114 +331,158 @@ mod test {
                                 ident: "C".to_owned(),
                                 values: vec!["some comments".to_owned()]
                             }
-                        ]
+                        ],
-                    }
+                        next: vec![],
-                ],
+                    }]
-                sub_sequences: vec![],
+                }],
-            }
+            },
         );
     }
 
     #[test]
-    fn it_can_parse_a_sequence_with_subsequences() {
+    fn it_can_parse_a_branching_sequence() {
         let text = "(;C[a];C[b](;C[c])(;C[d];C[e]))";
-        let (_, sequence) = parse_tree::<nom::error::VerboseError<&str>>(text).unwrap();
+        let (_, tree) = parse_tree::<nom::error::VerboseError<&str>>(text).unwrap();
 
-        let main_sequence = vec![
+        let expected = Node {
-            Node {
+            properties: vec![Property {
-                properties: vec![Property {
+                ident: "C".to_owned(),
-                    ident: "C".to_owned(),
+                values: vec!["a".to_owned()],
-                    values: vec!["a".to_owned()],
+            }],
-                }],
+            next: vec![Node {
-            },
-            Node {
                 properties: vec![Property {
                     ident: "C".to_owned(),
                     values: vec!["b".to_owned()],
                 }],
-            },
+                next: vec![
-        ];
+                    Node {
-        let subsequence_1 = Tree {
+                        properties: vec![Property {
-            sequence: vec![Node {
+                            ident: "C".to_owned(),
-                properties: vec![Property {
+                            values: vec!["c".to_owned()],
-                    ident: "C".to_owned(),
+                        }],
-                    values: vec!["c".to_owned()],
+                        next: vec![],
-                }],
+                    },
+                    Node {
+                        properties: vec![Property {
+                            ident: "C".to_owned(),
+                            values: vec!["d".to_owned()],
+                        }],
+                        next: vec![Node {
+                            properties: vec![Property {
+                                ident: "C".to_owned(),
+                                values: vec!["e".to_owned()],
+                            }],
+                            next: vec![],
+                        }],
+                    },
+                ],
             }],
-            sub_sequences: vec![],
-        };
-        let subsequence_2 = Tree {
-            sequence: vec![
-                Node {
-                    properties: vec![Property {
-                        ident: "C".to_owned(),
-                        values: vec!["d".to_owned()],
-                    }],
-                },
-                Node {
-                    properties: vec![Property {
-                        ident: "C".to_owned(),
-                        values: vec!["e".to_owned()],
-                    }],
-                },
-            ],
-            sub_sequences: vec![],
         };
 
-        assert_eq!(
+        assert_eq!(tree, expected);
-            sequence,
-            Tree {
-                sequence: main_sequence,
-                sub_sequences: vec![subsequence_1, subsequence_2],
-            }
-        );
     }
 
     #[test]
     fn it_can_parse_example_1() {
-        let (_, ex_tree) = parse_tree::<nom::error::VerboseError<&str>>(EXAMPLE).unwrap();
+        let (_, tree) = parse_tree::<nom::error::VerboseError<&str>>(EXAMPLE).unwrap();
-        assert_eq!(ex_tree.sequence.len(), 1);
 
-        assert_eq!(ex_tree.sequence[0].properties.len(), 2);
+        let j = Node {
-        assert_eq!(
+            properties: vec![Property {
-            ex_tree.sequence[0].properties[0],
+                ident: "C".to_owned(),
-            Property {
+                values: vec!["j".to_owned()],
-                ident: "FF".to_owned(),
+            }],
-                values: vec!["4".to_owned()]
+            next: vec![],
-            }
+        };
-        );
+        let i = Node {
-        assert_eq!(ex_tree.sub_sequences.len(), 2);
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["i".to_owned()],
+            }],
+            next: vec![],
+        };
+        let h = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["h".to_owned()],
+            }],
+            next: vec![i],
+        };
+        let g = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["g".to_owned()],
+            }],
+            next: vec![h],
+        };
+        let f = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["f".to_owned()],
+            }],
+            next: vec![g, j],
+        };
+        let e = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["e".to_owned()],
+            }],
+            next: vec![],
+        };
+        let d = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["d".to_owned()],
+            }],
+            next: vec![e],
+        };
+        let c = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["c".to_owned()],
+            }],
+            next: vec![],
+        };
+        let b = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["b".to_owned()],
+            }],
+            next: vec![c, d],
+        };
+        let a = Node {
+            properties: vec![Property {
+                ident: "C".to_owned(),
+                values: vec!["a".to_owned()],
+            }],
+            next: vec![b],
+        };
+        let expected = Node {
+            properties: vec![
+                Property {
+                    ident: "FF".to_owned(),
+                    values: vec!["4".to_owned()],
+                },
+                Property {
+                    ident: "C".to_owned(),
+                    values: vec!["root".to_owned()],
+                },
+            ],
+            next: vec![a, f],
+        };
 
-        assert_eq!(ex_tree.sub_sequences[0].sequence.len(), 2);
+        assert_eq!(tree, expected);
-        assert_eq!(
-            ex_tree.sub_sequences[0].sequence,
-            vec![
-                Node {
-                    properties: vec![Property {
-                        ident: "C".to_owned(),
-                        values: vec!["a".to_owned()]
-                    }]
-                },
-                Node {
-                    properties: vec![Property {
-                        ident: "C".to_owned(),
-                        values: vec!["b".to_owned()]
-                    }]
-                },
-            ]
-        );
-        assert_eq!(ex_tree.sub_sequences[0].sub_sequences.len(), 2);
     }
 
     #[test]
     fn it_can_regenerate_the_tree() {
         let (_, tree1) = parse_tree::<nom::error::VerboseError<&str>>(EXAMPLE).unwrap();
+        let tree1 = Tree { root: tree1 };
         assert_eq!(
             tree1.to_string(),
             "(;FF[4]C[root](;C[a];C[b](;C[c])(;C[d];C[e]))(;C[f](;C[g];C[h];C[i])(;C[j])))"
         );
         let (_, tree2) = parse_tree::<nom::error::VerboseError<&str>>(&tree1.to_string()).unwrap();
-        assert_eq!(tree1, tree2);
+        assert_eq!(tree1, Tree { root: tree2 });
     }
 
     #[test]