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1195 lines (1095 loc) · 42.1 KB
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using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
namespace NpgsqlRestClient;
public class Config
{
public IConfigurationRoot Cfg { get; private set; } = null!;
public IConfigurationSection NpgsqlRestCfg { get; private set; } = null!;
public IConfigurationSection ConnectionSettingsCfg { get; private set; } = null!;
public bool UseJsonApplicationName { get; private set; }
public string CurrentDir => Directory.GetCurrentDirectory();
public Dictionary<string, string>? EnvDict { get; private set; } = null;
public string? ConfigFilter { get; private set; }
public void Build(string[] args, string[] skip)
{
if (args.Length >= 1 && skip.Contains(args[0], StringComparer.CurrentCultureIgnoreCase))
{
args = [];
}
var tempBuilder = new ConfigurationBuilder();
IConfigurationRoot tempCfg;
var (configFiles, commandLineArgs) = BuildFromArgs(args);
if (configFiles.Count > 0)
{
foreach (var (fileName, optional) in configFiles)
{
tempBuilder.AddJsonFile(Path.GetFullPath(fileName, CurrentDir), optional: optional);
}
tempCfg = tempBuilder.Build();
}
else
{
tempCfg = tempBuilder
.AddJsonFile(Path.GetFullPath("appsettings.json", CurrentDir), optional: true)
.AddJsonFile(Path.GetFullPath("appsettings.Development.json", CurrentDir), optional: true)
.Build();
}
var cfgCfg = tempCfg.GetSection("Config");
ConfigurationBuilder configBuilder = new();
var useEnv = cfgCfg != null && GetConfigBool("AddEnvironmentVariables", cfgCfg);
if (configFiles.Count > 0)
{
foreach (var (fileName, optional) in configFiles)
{
configBuilder.AddJsonFile(Path.GetFullPath(fileName, CurrentDir), optional: optional);
}
if (useEnv)
{
configBuilder.AddEnvironmentVariables();
}
configBuilder.AddCommandLine(commandLineArgs);
Cfg = configBuilder.Build();
}
else
{
if (useEnv)
{
Cfg = configBuilder
.AddJsonFile(Path.GetFullPath("appsettings.json", CurrentDir), optional: true)
.AddJsonFile(Path.GetFullPath("appsettings.Development.json", CurrentDir), optional: true)
.AddEnvironmentVariables()
.AddCommandLine(commandLineArgs)
.Build();
}
else
{
Cfg = configBuilder
.AddJsonFile(Path.GetFullPath("appsettings.json", CurrentDir), optional: true)
.AddJsonFile(Path.GetFullPath("appsettings.Development.json", CurrentDir), optional: true)
.AddCommandLine(commandLineArgs)
.Build();
}
}
NpgsqlRestCfg = Cfg.GetSection("NpgsqlRest");
ConnectionSettingsCfg = Cfg.GetSection("ConnectionSettings");
var parseEnv = cfgCfg != null && GetConfigBool("ParseEnvironmentVariables", cfgCfg, true) is true;
if (useEnv || parseEnv)
{
var envFilePath = cfgCfg?.GetSection("EnvFile")?.Value;
if (envFilePath is not null)
{
var fullPath = Path.GetFullPath(envFilePath, CurrentDir);
if (File.Exists(fullPath))
{
LoadEnvFile(fullPath);
}
}
}
if (parseEnv)
{
EnvDict = new Dictionary<string, string>();
var envVars = Environment.GetEnvironmentVariables();
foreach (var key in envVars.Keys)
{
EnvDict.Add(key.ToString()!, envVars[key.ToString()!]?.ToString()!);
}
// {rnd1}..{rnd10}: random lowercase tokens (length = the trailing digit) generated once per
// process and stable across the whole config — usable wherever {ENV} placeholders are
// (connection strings, TestRunner Setup/Teardown). E.g. a test DB named per run:
// "ConnectionStrings:Test": "...;Database=app_test_{rnd6};..." + "create database app_test_{rnd6}".
// When several DISTINCT tokens of the same length are needed, indexed instances {rndN_1}..{rndN_9}
// are each independent (e.g. {rnd3}, {rnd3_1} and {rnd3_2} are three different 3-char tokens).
for (int n = 1; n <= 10; n++)
{
var nStr = n.ToString(System.Globalization.CultureInfo.InvariantCulture);
EnvDict[string.Concat("rnd", nStr)] = RandomToken(n);
for (int m = 1; m <= 9; m++)
{
EnvDict[string.Concat("rnd", nStr, "_", m.ToString(System.Globalization.CultureInfo.InvariantCulture))] = RandomToken(n);
}
}
}
UseJsonApplicationName = GetConfigBool("UseJsonApplicationName", ConnectionSettingsCfg);
}
public bool Exists(IConfigurationSection? section)
{
if (section is null)
{
return false;
}
if (section.GetChildren().Any() is false)
{
return false;
}
return true;
}
public bool GetConfigBool(string key, IConfiguration? subsection = null, bool defaultVal = false)
{
var section = subsection?.GetSection(key) ?? Cfg.GetSection(key);
if (string.IsNullOrEmpty(section.Value))
{
return defaultVal;
}
// {NAME} optional -> empty when the env var is unset; {!NAME} required -> throws here if unset.
var value = ResolveEnv(section.Value) ?? string.Empty;
// An optional env var that is unset resolves to empty (and, with env parsing off, can remain a
// literal {TOKEN}). Either way there is no value to parse, so fall back to the default rather
// than crashing startup - e.g. a feature flag wired to "{GITHUB_AUTH_ENABLED}" defaults to off.
if (string.IsNullOrEmpty(value) || HasUnresolvedToken(value))
{
return defaultVal;
}
// Handle various boolean representations
return value.ToLowerInvariant() switch
{
"true" or "yes" or "1" => true,
"false" or "no" or "0" => false,
_ => throw new InvalidOperationException($"Invalid boolean value '{value}' for configuration key '{key}'. Valid values are: true, false, yes, no, 1, 0")
};
}
// A random lowercase-letter token of the given length, used for the {rnd1}..{rnd10} config placeholders.
private static string RandomToken(int length)
{
const string chars = "abcdefghijklmnopqrstuvwxyz";
return string.Create(length, chars, static (span, c) =>
{
for (int i = 0; i < span.Length; i++)
{
span[i] = c[Random.Shared.Next(c.Length)];
}
});
}
// True when the value still contains a {TOKEN} placeholder, i.e. an environment variable that was
// not resolved because it is not set. Typed config values (bool/int) never legitimately contain
// braces, so an unresolved token is unambiguously a missing-env-var, not a real value.
private static bool HasUnresolvedToken(string value)
{
var open = value.IndexOf('{');
return open >= 0 && value.IndexOf('}', open + 1) > open;
}
/// <summary>
/// Substitutes environment-variable placeholders in a configuration value. Applies to every config
/// value type (bool, int, string, enum, arrays, dictionaries):
/// <list type="bullet">
/// <item><c>{NAME}</c> - optional: replaced with the variable's value when set; when it is <b>not</b>
/// set the placeholder is left untouched (so non-env brace syntax such as Serilog output templates
/// "{Timestamp}" is preserved, and typed readers like <see cref="GetConfigBool"/> fall back to their
/// default rather than crashing).</item>
/// <item><c>{!NAME}</c> - required: replaced with the variable's value, or throws at startup when it is not set.</item>
/// </list>
/// Returns the input unchanged when environment-variable parsing is disabled (<see cref="EnvDict"/> is null,
/// i.e. <c>Config:ParseEnvironmentVariables</c> is false).
/// </summary>
public string? ResolveEnv(string? value)
{
if (value is null || EnvDict is null || value.IndexOf('{') < 0)
{
return value;
}
var sb = new StringBuilder(value.Length);
int i = 0;
while (i < value.Length)
{
var c = value[i];
if (c != '{')
{
sb.Append(c);
i++;
continue;
}
var close = value.IndexOf('}', i + 1);
if (close < 0)
{
sb.Append(value, i, value.Length - i); // unterminated brace - emit the rest verbatim
break;
}
var token = value.Substring(i + 1, close - i - 1);
var required = token.StartsWith('!');
var name = required ? token[1..] : token;
if (EnvDict.TryGetValue(name, out var envValue))
{
sb.Append(envValue);
}
else if (required)
{
throw new InvalidOperationException(
$"Required environment variable '{name}' (referenced as '{{!{name}}}' in configuration) is not set.");
}
else
{
// optional + missing -> leave the placeholder untouched. This preserves the historical
// behaviour (only known env vars were ever substituted), so legitimate non-env brace
// syntax - Serilog output templates, etc. - is not destroyed. Typed bool/int readers
// treat a leftover {TOKEN} as "not configured" via HasUnresolvedToken.
sb.Append('{').Append(token).Append('}');
}
i = close + 1;
}
return sb.ToString();
}
public string? GetConfigStr(string key, IConfiguration? subsection = null)
{
var section = subsection?.GetSection(key) ?? Cfg.GetSection(key);
if (string.IsNullOrEmpty(section.Value))
{
return null;
}
return ResolveEnv(section.Value);
}
public int? GetConfigInt(string key, IConfiguration? subsection = null)
{
var section = subsection?.GetSection(key) ?? Cfg.GetSection(key);
if (string.IsNullOrEmpty(section.Value))
{
return null;
}
var configValue = ResolveEnv(section.Value) ?? string.Empty;
// Unset env var (empty or, with env parsing off, an unresolved {TOKEN}) → treat as not configured.
if (string.IsNullOrEmpty(configValue) || HasUnresolvedToken(configValue))
{
return null;
}
return int.TryParse(configValue, out var value) ? value :
throw new InvalidOperationException($"Invalid integer value '{configValue}' for configuration key '{key}'.");
}
public T? GetConfigEnum<T>(string key, IConfiguration? subsection = null)
{
var section = subsection?.GetSection(key) ?? Cfg.GetSection(key);
if (string.IsNullOrEmpty(section.Value))
{
return default;
}
var value = ResolveEnv(section.Value);
return GetEnum<T>(value);
}
public T? GetEnum<T>(string? value)
{
if (value is null)
{
return default;
}
var type = typeof(T);
var nullable = Nullable.GetUnderlyingType(type);
var names = Enum.GetNames(nullable ?? type);
foreach (var name in names)
{
if (string.Equals(value, name, StringComparison.OrdinalIgnoreCase))
{
return (T)Enum.Parse(nullable ?? type, name);
}
}
return default;
}
public IEnumerable<string>? GetConfigEnumerable(string key, IConfiguration? subsection = null)
{
var section = subsection is not null ? subsection?.GetSection(key) : Cfg.GetSection(key);
if (section.Exists() is false)
{
return null;
}
var children = section?.GetChildren().ToArray();
if (children is null || (children.Length == 0 && section?.Value == ""))
{
return null;
}
return children
.Where(c => string.IsNullOrEmpty(c.Value) is false)
.Select(c => ResolveEnv(c.Value)!);
}
public T? GetConfigFlag<T>(string key, IConfiguration? subsection = null)
{
var array = GetConfigEnumerable(key, subsection)?.ToArray();
if (array is null)
{
return default;
}
var type = typeof(T);
var nullable = Nullable.GetUnderlyingType(type);
var names = Enum.GetNames(nullable ?? type);
T? result = default;
foreach (var value in array)
{
foreach (var name in names)
{
if (string.Equals(value, name, StringComparison.OrdinalIgnoreCase))
{
var e = (T)Enum.Parse(nullable ?? type, name);
if (result is null)
{
result = e;
}
else
{
result = (T)Enum.ToObject(type, Convert.ToInt32(result) | Convert.ToInt32(e));
}
}
}
}
return result;
}
/// <summary>
/// Reads a config section that accepts BOTH an array of names and an object of name→default pairs,
/// returning a name→default map. Used by <c>AvailableClaims</c> and <c>AvailableEnvVars</c> under
/// <c>StaticFiles:ParseContentOptions</c>.
/// <list type="bullet">
/// <item>Array form <c>["A","B"]</c> → IConfiguration exposes numeric child keys; each name maps to
/// <c>null</c> meaning "no explicit default" (the caller supplies the per-feed fallback).</item>
/// <item>Object form <c>{"A":"x","B":""}</c> → each name maps to its configured default value.</item>
/// </list>
/// Env-var tokens inside values are substituted via <see cref="EnvDict"/> consistent with the rest
/// of the config reader. Returns null when the section is absent or empty.
/// </summary>
public Dictionary<string, string?>? GetConfigNameDefaults(string key, IConfiguration? subsection = null)
{
var section = subsection is not null ? subsection.GetSection(key) : Cfg.GetSection(key);
if (section.Exists() is false)
{
return null;
}
var children = section.GetChildren().ToArray();
if (children.Length == 0)
{
return null;
}
// Array form when every child key is a numeric index (how IConfiguration represents a JSON array).
bool arrayForm = children.All(c => int.TryParse(c.Key, out _));
var result = new Dictionary<string, string?>(children.Length);
if (arrayForm)
{
foreach (var c in children)
{
if (string.IsNullOrEmpty(c.Value))
{
continue;
}
var name = ResolveEnv(c.Value)!;
result[name] = null;
}
}
else
{
foreach (var c in children)
{
if (c.Value is null)
{
continue; // skip nested objects/arrays - only scalar name→default pairs are valid here
}
var def = ResolveEnv(c.Value);
result[c.Key] = def;
}
}
return result.Count == 0 ? null : result;
}
public Dictionary<string, string>? GetConfigDict(IConfiguration config)
{
var result = new Dictionary<string, string>();
foreach (var section in config.GetChildren())
{
if (section.Value is not null)
{
result.TryAdd(section.Key, ResolveEnv(section.Value)!);
}
}
return result.Count == 0 ? null : result;
}
public string Serialize()
{
var defaults = ConfigDefaults.GetDefaults();
var actual = SerializeConfig(Cfg);
var merged = ConfigDefaults.MergeWithDefaults(defaults, actual);
return merged?.ToJsonString(new JsonSerializerOptions() { WriteIndented = true }) ?? "{}";
}
public string SerializeWithComments()
{
var defaults = ConfigDefaults.GetDefaults();
var actual = SerializeConfig(Cfg, stripPasswords: false);
var merged = ConfigDefaults.MergeWithDefaults(defaults, actual);
if (merged is not JsonObject root)
{
return "{}";
}
// If merged config matches defaults, output the exact JSONC template
// This preserves all hand-crafted formatting, inline comments, and special sections
var defaultsClone = ConfigDefaults.GetDefaults();
if (defaultsClone is not null && JsonNodesEqual(root, defaultsClone))
{
return ConfigSchemaGenerator.DefaultConfigJsonc;
}
// Fallback: use template-based substitution for overridden configs
return SubstituteTemplateValues(root);
}
/// <summary>
/// Walks the JSONC template and substitutes values from the merged config where they differ from defaults.
/// </summary>
private string SubstituteTemplateValues(JsonObject merged)
{
var template = ConfigSchemaGenerator.DefaultConfigJsonc;
var flatMerged = new Dictionary<string, string?>(StringComparer.OrdinalIgnoreCase);
FlattenJsonNode(merged, "", flatMerged);
var flatDefaults = new Dictionary<string, string?>(StringComparer.OrdinalIgnoreCase);
var defaults = ConfigDefaults.GetDefaults();
if (defaults is not null)
{
FlattenJsonNode(defaults, "", flatDefaults);
}
// Find paths where values differ
var changedPaths = new Dictionary<string, string?>(StringComparer.OrdinalIgnoreCase);
foreach (var kvp in flatMerged)
{
if (!flatDefaults.TryGetValue(kvp.Key, out var defaultVal) || defaultVal != kvp.Value)
{
changedPaths[kvp.Key] = kvp.Value;
}
}
if (changedPaths.Count == 0)
{
return template;
}
// Walk the template and substitute changed values
var lines = template.Split('\n');
var sb = new StringBuilder();
var pathStack = new List<string>();
var inComment = false;
for (int i = 0; i < lines.Length; i++)
{
var line = lines[i];
var trimmed = line.TrimEnd('\r').TrimStart();
// Track multi-line comments
if (trimmed.StartsWith("/*"))
{
inComment = true;
}
if (inComment)
{
sb.Append(lines[i].TrimEnd('\r'));
if (i < lines.Length - 1) sb.Append('\n');
if (trimmed.Contains("*/"))
{
inComment = false;
}
continue;
}
// Skip single-line comments
if (trimmed.StartsWith("//"))
{
sb.Append(lines[i].TrimEnd('\r'));
if (i < lines.Length - 1) sb.Append('\n');
continue;
}
// Track nesting
if (trimmed.StartsWith('"'))
{
// Try to extract key from "key": ...
var colonIdx = trimmed.IndexOf(':');
if (colonIdx > 0)
{
var key = trimmed[1..trimmed.IndexOf('"', 1)];
var currentPath = pathStack.Count > 0 ? string.Join(":", pathStack) + ":" + key : key;
var afterColon = trimmed[(colonIdx + 1)..].TrimStart();
// Check if this is a value line (not object or array open)
bool isObjectOpen = afterColon.StartsWith('{') && !afterColon.StartsWith("{ }") && !afterColon.TrimEnd(',').EndsWith('}');
bool isArrayOpen = afterColon.StartsWith('[') && !afterColon.TrimEnd(',').EndsWith(']');
if (isObjectOpen)
{
pathStack.Add(key);
}
else if (isArrayOpen)
{
pathStack.Add(key);
}
else if (changedPaths.TryGetValue(currentPath, out var newVal))
{
// Substitute the value
var endsWithComma = trimmed.TrimEnd().EndsWith(',');
var inlineComment = "";
// Preserve inline comments
var valueAndRest = afterColon;
var commentIdx = FindInlineCommentIndex(valueAndRest);
if (commentIdx >= 0)
{
inlineComment = " " + valueAndRest[commentIdx..].TrimEnd(',').TrimEnd();
if (endsWithComma && !inlineComment.EndsWith(','))
{
// comma was after inline comment
}
}
var prefix = line.TrimEnd('\r')[..(line.TrimEnd('\r').IndexOf(':') + 2)];
var comma = endsWithComma ? "," : "";
sb.Append($"{prefix}{newVal ?? "null"}{comma}{inlineComment}");
if (i < lines.Length - 1) sb.Append('\n');
continue;
}
}
}
// Track closing braces
if (trimmed.StartsWith('}') || trimmed.StartsWith(']'))
{
if (pathStack.Count > 0)
{
pathStack.RemoveAt(pathStack.Count - 1);
}
}
sb.Append(lines[i].TrimEnd('\r'));
if (i < lines.Length - 1) sb.Append('\n');
}
return sb.ToString();
}
private static int FindInlineCommentIndex(string s)
{
bool inString = false;
bool escape = false;
for (int i = 0; i < s.Length - 1; i++)
{
if (escape) { escape = false; continue; }
if (s[i] == '\\') { escape = true; continue; }
if (s[i] == '"') { inString = !inString; continue; }
if (!inString && s[i] == '/' && s[i + 1] == '/')
{
return i;
}
}
return -1;
}
private static void FlattenJsonNode(JsonNode node, string prefix, Dictionary<string, string?> result)
{
if (node is JsonObject obj)
{
foreach (var kvp in obj)
{
var path = string.IsNullOrEmpty(prefix) ? kvp.Key : $"{prefix}:{kvp.Key}";
if (kvp.Value is JsonObject || kvp.Value is JsonArray)
{
FlattenJsonNode(kvp.Value, path, result);
}
else
{
result[path] = kvp.Value?.ToJsonString();
}
}
}
else if (node is JsonArray arr)
{
for (int i = 0; i < arr.Count; i++)
{
var path = $"{prefix}:{i}";
if (arr[i] is JsonObject || arr[i] is JsonArray)
{
FlattenJsonNode(arr[i]!, path, result);
}
else
{
result[path] = arr[i]?.ToJsonString();
}
}
}
}
private static bool JsonNodesEqual(JsonNode? a, JsonNode? b)
{
if (a is null && b is null) return true;
if (a is null || b is null) return false;
if (a is JsonObject aObj && b is JsonObject bObj)
{
if (aObj.Count != bObj.Count) return false;
foreach (var kvp in aObj)
{
if (!bObj.ContainsKey(kvp.Key)) return false;
if (!JsonNodesEqual(kvp.Value, bObj[kvp.Key])) return false;
}
return true;
}
if (a is JsonArray aArr && b is JsonArray bArr)
{
if (aArr.Count != bArr.Count) return false;
for (int i = 0; i < aArr.Count; i++)
{
if (!JsonNodesEqual(aArr[i], bArr[i])) return false;
}
return true;
}
return a.ToJsonString() == b.ToJsonString();
}
public string FilterConfig(string filter)
{
var source = SerializeWithComments();
var lines = source.Split('\n');
// Parse entries inside the outermost { }
var entries = ParseJsoncEntries(lines, 1, lines.Length - 1);
// Collect filtered blocks (each block = list of lines, no trailing comma on last line)
var blocks = CollectFilteredBlocks(entries, lines, filter);
if (blocks.Count == 0)
{
return $"// No results for \"{filter}\"";
}
var sb = new StringBuilder();
sb.AppendLine("{");
for (int i = 0; i < blocks.Count; i++)
{
var block = blocks[i];
for (int j = 0; j < block.Count; j++)
{
var line = block[j];
if (j == block.Count - 1)
{
line = StripTrailingComma(line);
if (i < blocks.Count - 1)
{
line = AddTrailingComma(line);
}
}
sb.AppendLine(line);
}
}
sb.Append('}');
return sb.ToString();
}
private sealed class JsoncEntry
{
public int CommentStart; // first line of preceding comments/blanks
public int KeyLine; // the "key": value or "key": { line
public int EndLine; // last line (value line for leaves, } line for sections)
public string Key = "";
public bool IsSection;
public List<JsoncEntry> Children = [];
}
private static List<JsoncEntry> ParseJsoncEntries(string[] lines, int start, int end)
{
var entries = new List<JsoncEntry>();
int i = start;
while (i < end)
{
var trimmed = lines[i].AsSpan().Trim();
// Skip pure blank lines and collect comment start position
if (trimmed.IsEmpty || trimmed.StartsWith("//"))
{
// This might be the start of a new entry's comment block
int commentStart = i;
while (i < end)
{
var t = lines[i].AsSpan().Trim();
if (t.IsEmpty || t.StartsWith("//"))
{
i++;
continue;
}
break;
}
if (i >= end) break;
// Now lines[i] should be a key line
var entry = ParseKeyLine(lines, commentStart, i, end);
if (entry is not null)
{
entries.Add(entry);
i = entry.EndLine + 1;
}
else
{
i++;
}
}
else if (trimmed.Length > 0 && trimmed[0] == '"')
{
// Key line without preceding comments
var entry = ParseKeyLine(lines, i, i, end);
if (entry is not null)
{
entries.Add(entry);
i = entry.EndLine + 1;
}
else
{
i++;
}
}
else
{
i++;
}
}
return entries;
}
private static JsoncEntry? ParseKeyLine(string[] lines, int commentStart, int keyLine, int end)
{
var line = lines[keyLine];
var trimmed = line.AsSpan().Trim();
// Extract key name from "key": ...
if (trimmed.Length == 0 || trimmed[0] != '"') return null;
int closeQuote = trimmed[1..].IndexOf('"');
if (closeQuote < 0) return null;
closeQuote += 1; // adjust for the slice offset
var key = trimmed[1..closeQuote].ToString();
// Check if value opens a section
var afterKey = trimmed[(closeQuote + 1)..].TrimStart();
if (afterKey.Length > 0 && afterKey[0] == ':')
{
var valueStart = afterKey[1..].TrimStart();
if (valueStart.Length > 0 && valueStart[0] == '{')
{
// Section — find matching closing }
int depth = 0;
for (int i = keyLine; i < end; i++)
{
var lt = lines[i].AsSpan().Trim();
if (lt.StartsWith("//")) continue;
depth += CountBraces(lines[i]);
if (depth == 0)
{
var entry = new JsoncEntry
{
CommentStart = commentStart,
KeyLine = keyLine,
EndLine = i,
Key = key,
IsSection = true,
Children = ParseJsoncEntries(lines, keyLine + 1, i)
};
return entry;
}
}
// If we can't find matching brace, treat as leaf
}
}
// Leaf entry
return new JsoncEntry
{
CommentStart = commentStart,
KeyLine = keyLine,
EndLine = keyLine,
Key = key,
IsSection = false
};
}
private static int CountBraces(string line)
{
int count = 0;
bool inString = false;
var span = line.AsSpan();
// Skip comment lines
if (span.TrimStart().StartsWith("//")) return 0;
for (int i = 0; i < span.Length; i++)
{
if (span[i] == '\\' && inString) { i++; continue; }
if (span[i] == '"') { inString = !inString; continue; }
if (!inString)
{
if (span[i] == '{') count++;
else if (span[i] == '}') count--;
}
}
return count;
}
private static bool EntryMatches(JsoncEntry entry, string[] lines, string filter)
{
var cmp = StringComparison.OrdinalIgnoreCase;
// Check key name
if (entry.Key.Contains(filter, cmp)) return true;
// Check comment and value lines
for (int i = entry.CommentStart; i <= Math.Min(entry.KeyLine, entry.EndLine); i++)
{
if (lines[i].Contains(filter, cmp)) return true;
}
// For leaf entries, check the value line
if (!entry.IsSection && lines[entry.KeyLine].Contains(filter, cmp)) return true;
// For sections, check if any child matches
if (entry.IsSection)
{
foreach (var child in entry.Children)
{
if (EntryMatches(child, lines, filter)) return true;
}
}
return false;
}
private static bool EntryDirectlyMatches(JsoncEntry entry, string[] lines, string filter)
{
var cmp = StringComparison.OrdinalIgnoreCase;
if (entry.Key.Contains(filter, cmp)) return true;
for (int i = entry.CommentStart; i <= entry.KeyLine; i++)
{
if (lines[i].Contains(filter, cmp)) return true;
}
return false;
}
private static List<List<string>> CollectFilteredBlocks(List<JsoncEntry> entries, string[] lines, string filter)
{
var blocks = new List<List<string>>();
foreach (var entry in entries)
{
if (!EntryMatches(entry, lines, filter)) continue;
if (!entry.IsSection)
{
// Leaf: copy comment lines + value line
var block = ExtractLines(lines, entry.CommentStart, entry.EndLine);
StripTrailingCommaFromLastLine(block);
blocks.Add(block);
}
else if (EntryDirectlyMatches(entry, lines, filter))
{
// Section name/comment matches — include entire section
var block = ExtractLines(lines, entry.CommentStart, entry.EndLine);
StripTrailingCommaFromLastLine(block);
blocks.Add(block);
}
else
{
// Section has matching children — include section wrapper with only matched children
var childBlocks = CollectFilteredBlocks(entry.Children, lines, filter);
if (childBlocks.Count == 0) continue;
var block = new List<string>();
// Section comments and opening line
for (int i = entry.CommentStart; i <= entry.KeyLine; i++)
{
block.Add(lines[i]);
}
// Matched children with commas between them
for (int ci = 0; ci < childBlocks.Count; ci++)
{
var cb = childBlocks[ci];
if (ci < childBlocks.Count - 1)
{
AddTrailingCommaToLastLine(cb);
}
block.AddRange(cb);
}
// Closing line
block.Add(StripTrailingComma(lines[entry.EndLine]));
blocks.Add(block);
}
}
return blocks;
}
private static List<string> ExtractLines(string[] lines, int start, int end)
{
var result = new List<string>(end - start + 1);
for (int i = start; i <= end; i++)
{
result.Add(lines[i]);
}
return result;
}
private static int FindJsonContentEnd(string line)
{
// Find the end of JSON content, skipping inline // comments
bool inString = false;
for (int i = 0; i < line.Length; i++)
{
if (line[i] == '\\' && inString) { i++; continue; }
if (line[i] == '"') { inString = !inString; continue; }
if (!inString && i + 1 < line.Length && line[i] == '/' && line[i + 1] == '/')
{
// Found inline comment — JSON content ends before this
int end = i;
while (end > 0 && char.IsWhiteSpace(line[end - 1])) end--;
return end;
}
}
// No inline comment — trim trailing whitespace
int e = line.Length;
while (e > 0 && char.IsWhiteSpace(line[e - 1])) e--;
return e;
}
private static string StripTrailingComma(string line)
{
int end = FindJsonContentEnd(line);
if (end > 0 && line[end - 1] == ',')
{
return line[..(end - 1)] + line[end..];
}
return line;
}
private static string AddTrailingComma(string line)
{
int end = FindJsonContentEnd(line);
if (end > 0 && line[end - 1] != ',')
{
return line[..end] + "," + line[end..];
}
return line;
}
private static void StripTrailingCommaFromLastLine(List<string> block)
{
for (int i = block.Count - 1; i >= 0; i--)
{
var trimmed = block[i].AsSpan().Trim();
if (trimmed.IsEmpty || trimmed.StartsWith("//")) continue;
block[i] = StripTrailingComma(block[i]);
break;
}
}
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