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using System.Data;
namespace CRMInterface
{
public class AQLParser
{
private readonly CRMInterfaceClient Client;
public AQLParser(CRMInterfaceClient client)
{
Client = client;
}
public Query Parse(string aql)
{
Query query = new(Client);
List<Statement> statements = Parser.ParseStatements(aql);
AQLSelect? select = null;
AQLFrom? from = null;
AQLFrom? last = null;
foreach (Statement statement in statements)
{
switch (statement.Verb)
{
case "select":
if (select is not null) throw new SyntaxErrorException("Impossible d'avoir plusieurs clauses Select");
select = new AQLSelect(statement.Detail);
break;
case "from":
if (select is null) throw new SyntaxErrorException("Impossible un From sans Select");
if (from is not null) throw new SyntaxErrorException("Impossible d'avoir plusieurs clauses From");
last = new AQLFrom(Client, statement.Detail);
from = last;
break;
case "with":
last = new AQLWith(Client, statement.Detail);
if (from is null) throw new SyntaxErrorException("Clause With avant la clause From");
from.Add(last);
break;
case "plus":
last = new AQLPlus(Client, statement.Detail);
if (from is null) throw new SyntaxErrorException("Clause Plus avant la clause From");
from.Add(last);
break;
case "having":
last = new AQLHaving(Client, statement.Detail);
if (from is null) throw new SyntaxErrorException("Clause Having avant la clause From");
from.Add(last);
break;
case "without":
last = new AQLWithout(Client, statement.Detail);
if (from is null) throw new SyntaxErrorException("Clause Without avant la clause From");
from.Add(last);
break;
case "where":
if (last is null) throw new SyntaxErrorException("Clause Where sans clause From ou With");
last.AddWhere(statement.Detail);
break;
default:
throw new NotImplementedException(statement.Verb);
}
}
if (select is null) throw new SyntaxErrorException("Pas de clause Select");
if (from is null) throw new SyntaxErrorException("Pas de clause From");
from.AddSelect(select);
query.Tables.Add(from.Table);
query.Conditions.AddRange(from.Conditions);
query.Fields.AddRange(from.Fields);
return query;
}
public class AQLSelect
{
public List<AQLField> Fields;
public AQLSelect(string selectStatement)
{
Fields = [];
string[] strings = selectStatement.Split(',', StringSplitOptions.TrimEntries);
foreach (string s in strings)
{
if (s.StartsWith('\'') && s.EndsWith('\''))
{
Fields.Add(new(s.Substring(1, s.Length - 2)));
}
else
{
Fields.Add(new(s));
}
}
}
public AQLSelect Clone()
{
AQLSelect select = new(string.Empty)
{
Fields = new(Fields)
};
return select;
}
public class AQLField
{
public readonly string Name;
public readonly string Prefix;
public AQLField(string fieldStatement)
{
if (fieldStatement.Contains('.'))
{
string[] s = fieldStatement.Split('.');
Prefix = s[0];
Name = s[1];
}
else
{
Prefix = string.Empty;
Name = fieldStatement;
}
}
}
}
public class AQLFrom
{
private AQLSelect? Select = null;
private List<AQLFrom> Froms = [];
private AQLWhere? Where = null;
private readonly RelationType Relation;
public uint Flags
{
get
{
return Relation switch
{
RelationType.With => 0x00000100,
RelationType.Having => 0x00000200,
RelationType.Without => 0x00000400,
RelationType.Plus => 0x00000800,
_ => 0,
};
}
}
public string Parent { get; set; } = string.Empty;
public string Name { get; set; }
public string Alias { get; set; } = string.Empty;
public string AliasOrName
{
get
{
if (!string.IsNullOrWhiteSpace(Alias))
{
return Alias;
}
else
{
return Name;
}
}
}
public int LinkID { get; set; } = 0;
private readonly CRMInterfaceClient Client;
private Table? table = null;
public Table Table
{
get
{
if (table is null)
{
table = new(Client, Name, Alias, LinkID, Flags);
foreach (AQLFrom from in Froms)
{
table.Tables.Add(from.Table);
}
}
return table;
}
}
List<Condition>? conditions = null;
public List<Condition> Conditions
{
get
{
if (conditions is null)
{
conditions = [];
if (Where is not null)
{
conditions.Add(Where.Condition);
}
foreach (AQLFrom from in Froms)
{
conditions.AddRange(from.Conditions);
}
}
return conditions;
}
}
List<Fields>? fields = null;
public List<Fields> Fields
{
get
{
if (Select is null) throw new Exception("Select ne doit pas être null");
if (fields is null)
{
fields = [];
List<string> fids = [];
AQLSelect copy = Select.Clone();
if (Select.Fields.Any(a => string.IsNullOrWhiteSpace(a.Prefix)))
{
foreach (AQLSelect.AQLField field in Select.Fields.Where(a => string.IsNullOrWhiteSpace(a.Prefix)))
{
copy.Fields.Remove(field);
string fid = field.Name;
if (!int.TryParse(fid, out _))
{
fid = Client.GetFieldId(Table, fid);
}
fids.Add(fid);
}
}
else if (Select.Fields.Any(a => a.Prefix == AliasOrName))
{
foreach (AQLSelect.AQLField field in Select.Fields.Where(a => a.Prefix == AliasOrName))
{
copy.Fields.Remove(field);
string fid = field.Name;
if (!int.TryParse(fid, out _))
{
fid = Client.GetFieldId(Table, fid);
}
fids.Add(fid);
}
}
if (fids.Any())
{
fields.Add(new CRMInterface.Fields(Table, string.Join(',', fids)));
}
foreach (AQLFrom from in Froms)
{
from.AddSelect(copy);
fields.AddRange(from.Fields);
}
}
return fields;
}
}
protected AQLFrom(CRMInterfaceClient client, RelationType relation, string fromStatement)
{
Client = client;
Relation = relation;
string[] parts = fromStatement.Split(' ');
string name = parts[0];
if (name.Contains('.'))
{
string[] nameparts = name.Split('.');
Parent = nameparts[0];
Name = nameparts[1];
}
else
{
Name = name;
}
int i = 1;
while (i < parts.Length)
{
if (parts[i] == "as")
{
Alias = parts[i + 1];
i += 2;
}
else if (parts[i] == "using")
{
LinkID = int.Parse(parts[i + 2]);
i += 3;
}
else
{
throw new Exception("WTF!?");
}
}
}
public AQLFrom(CRMInterfaceClient client, string fromStatement) : this(client, RelationType.From, fromStatement) { }
public void AddSelect(AQLSelect select)
{
Select = select;
}
public void AddWhere(string whereStatement)
{
Where = new(Client, this, whereStatement);
}
public bool Add(AQLFrom from)
{
table = null;
conditions = null;
if (string.IsNullOrEmpty(from.Parent))
{
Froms.Add(from);
return true;
}
else
{
if (from.Parent == AliasOrName)
{
Froms.Add(from);
return true;
}
else
{
bool res = false;
foreach (AQLFrom f in Froms)
{
res &= f.Add(from);
if (res) break;
}
return res;
}
}
}
}
public class AQLWith : AQLFrom
{
public AQLWith(CRMInterfaceClient client, string withStatement) : base(client, RelationType.With, withStatement) { }
}
public class AQLPlus : AQLFrom
{
public AQLPlus(CRMInterfaceClient client, string withStatement) : base(client, RelationType.Plus, withStatement) { }
}
public class AQLHaving : AQLFrom
{
public AQLHaving(CRMInterfaceClient client, string withStatement) : base(client, RelationType.Having, withStatement) { }
}
public class AQLWithout : AQLFrom
{
public AQLWithout(CRMInterfaceClient client, string withStatement) : base(client, RelationType.Without, withStatement) { }
}
public class AQLWhere
{
public Condition Condition;
public AQLWhere(CRMInterfaceClient client, AQLFrom from, string whereStatement)
{
Condition = new(from.Table);
Condition.AddConditionElement(Parser.ParseCondition(whereStatement).ToCondition(from.Table));
}
}
public enum RelationType
{
From,
With,
Plus,
Having,
Without,
}
private static class Parser
{
public static List<Statement> ParseStatements(string query)
{
List<Statement> statements = [];
int parenthesisLevel = 0;
bool isInQuote = false;
bool backSlash = false;
int startVerb = -1;
int startDetail = -1;
Statement currentStatement = new();
for (int i = 0, cpt = query.Length; i < cpt; i++)
{
switch (query[i])
{
case '\\':
backSlash = !backSlash;
break;
case '\r':
case '\n':
case '\t':
case ' ':
backSlash = false;
if (isInQuote) break;
if (startVerb != -1)
{
if (!string.IsNullOrWhiteSpace(currentStatement.Verb))
{
throw new Exception("Deux verbes à la suite ?");
}
currentStatement.Verb = query[startVerb..i];
startVerb = -1;
}
break;
case '\'':
if (backSlash)
{
backSlash = false;
}
else
{
isInQuote = !isInQuote;
}
break;
case '(':
if (isInQuote) break;
if (parenthesisLevel == 0 && startDetail == -1)
{
startDetail = i + 1;
}
parenthesisLevel++;
break;
case ')':
if (isInQuote) break;
if (parenthesisLevel == 1 && startDetail != 1)
{
if (!string.IsNullOrWhiteSpace(currentStatement.Detail))
{
throw new Exception("Deux détails à la suite ?");
}
currentStatement.Detail = query[startDetail..i];
statements.Add(currentStatement);
currentStatement = new();
startDetail = -1;
}
parenthesisLevel--;
break;
default:
if (isInQuote) break;
if (startVerb == -1 && parenthesisLevel == 0)
{
startVerb = i;
}
backSlash = false;
break;
}
}
return statements;
}
public static IAQLCondition ParseCondition(string where)
{
ComposedCondition condition = new();
SimpleCondition simpleCondition = new();
string[] elements = where.Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
for (int i = 0, cpt = elements.Length; i < cpt; i++)
{
switch (elements[i])
{
case "AND":
case "OR":
condition.AddOperator(elements[i]);
break;
default:
if (elements[i].StartsWith('('))
{
int start = i;
int parenthesisLevel = 0;
while (true)
{
for (int j = 0; j < elements[i].Length; j++)
{
if (elements[i][j] == '(') parenthesisLevel++;
else if (elements[i][j] == ')') parenthesisLevel--;
}
if (parenthesisLevel == 0) break;
if ((i + 1) < cpt)
{
i++;
}
else
{
break;
}
}
elements[start] = elements[start][1..];
elements[i] = elements[i][..^1];
condition.AddPart(ParseCondition(string.Join(' ', elements[start..(i+1)])));
if (condition.IsComplete && i < elements.Length)
{
ComposedCondition newCondition = new();
newCondition.AddPart(condition);
condition = newCondition;
}
}
else
{
simpleCondition.Parse(elements[i]);
if (simpleCondition.IsComplete)
{
condition.AddPart(simpleCondition);
simpleCondition = new();
if (condition.IsComplete)
{
ComposedCondition newcondition = new();
newcondition.AddPart(condition);
condition = newcondition;
}
}
}
break;
}
}
return condition;
}
}
private class Statement
{
public string Verb { get; set; } = string.Empty;
public string Detail { get; set; } = string.Empty;
public override string ToString()
{
return $"[{Verb}] - [{Detail}]";
}
}
private interface IAQLCondition
{
public IConditionsElement ToCondition(Table table)
{
IConditionsElement condition;
if (this is SimpleCondition simpleCondition)
{
condition = new Cond(table, simpleCondition.Left, simpleCondition.Operator, simpleCondition.Right, true);
}
else if (this is ComposedCondition composedCondition)
{
if (composedCondition.IsComplete)
{
Lop lop;
switch (composedCondition.Operator)
{
case "AND":
lop = new Lop(table, LopValue.AND);
break;
case "OR":
lop = new Lop(table, LopValue.OR);
break;
default:
throw new NotImplementedException(composedCondition.Operator);
}
lop.AddConditionElement(composedCondition.Left.ToCondition(table));
lop.AddConditionElement(composedCondition.Right.ToCondition(table));
condition = lop;
}
else
{
condition = composedCondition.Left.ToCondition(table);
}
}
else
{
throw new NotImplementedException(this.GetType().Name);
}
return condition;
}
}
private class SimpleCondition : IAQLCondition
{
private readonly string[] parts = new string[3];
public string Left { get { return parts[0]; } }
public string Operator { get { return parts[1]; } }
public string Right { get { return parts[2]; } }
public bool IsComplete { get { return parts[2] is not null; } }
public void Parse(string condition)
{
// F7000
// F7000='1'
// ...
bool backSlash = false;
bool isInQuote = false;
int startVerb = -1;
string verb = string.Empty;
for (int i = 0; i < condition.Length; i++)
{
switch (condition[i])
{
case '\\':
backSlash = !backSlash;
break;
case '\r':
case '\n':
case '\t':
case ' ':
backSlash = false;
if (isInQuote) break;
if (startVerb != -1)
{
AddPart(condition[startVerb..i]);
startVerb = -1;
}
break;
case '\'':
if (backSlash)
{
backSlash = false;
}
else
{
isInQuote = !isInQuote;
}
if (isInQuote)
{
startVerb = i;
}
else
{
AddPart(condition[startVerb..(i+1)]);
startVerb = -1;
}
break;
case '<':
case '>':
case '=':
if (startVerb > -1)
{
AddPart(condition[startVerb..i]);
startVerb = -1;
}
if (condition[i + 1] == '=' || condition[i + 1] == '>')
{
AddPart(condition[i..(i+1)]);
i++;
}
else
{
AddPart(condition[i].ToString());
}
break;
default:
if (isInQuote) break;
if (startVerb == -1)
{
startVerb = i;
}
backSlash = false;
break;
}
}
if (startVerb > -1)
{
AddPart(condition[startVerb..]);
}
}
public int AddPart(string part)
{
if (part.StartsWith('\'') && part.EndsWith('\''))
{
part = part[1..^1];
}
for (int i = 0; i < 3; i++)
{
if (parts[i] is null)
{
parts[i] = part;
return i + 1;
}
}
throw new IndexOutOfRangeException($"Cette condition est déjà pleine : {this}");
}
public override string ToString()
{
return $"{parts[0]}{parts[1]}{parts[2]}";
}
}
private class ComposedCondition : IAQLCondition
{
private readonly IAQLCondition[] operandes = new IAQLCondition[2];
public IAQLCondition Left { get { return operandes[0]; } }
public string? Operator { get; set; }
public IAQLCondition Right { get { return operandes[1]; } }
public bool IsComplete { get { return Operator is not null && Right is not null; } }
public int AddPart(IAQLCondition operande)
{
if (operandes[0] is null)
{
operandes[0] = operande;
return 1;
}
else if (operandes[1] is null)
{
operandes[1] = operande;
return 2;
}
throw new IndexOutOfRangeException($"Cette condition est déjà pleine : {this}");
}
public void AddOperator(string op)
{
if (Operator is null)
{
Operator = op;
return;
}
throw new IndexOutOfRangeException($"Cette condition est déjà pleine : {this}");
}
public override string ToString()
{
return $"{operandes[0]} {Operator} {operandes[1]}";
}
}
}
} |
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