conf-database/conf.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "conf.h"

int findConfId(ptConf confChain) {
    ptConf px = confChain;
    int max = 0;

    while (px -> next != NULL) {
        if (px -> id > max) {
            max = px -> id;
        }
		
		px = px -> next;
    }

    return max + 1;
}

ptConf newConfChain() {
    ptConf confChain = (ptConf) malloc(sizeof(tConf));

    confChain -> next = (ptConf) malloc(sizeof(tConf));
    confChain -> next -> next = NULL;
    confChain -> id = -1;

    return confChain;
}

void addConf(ptConf confChain, int id, char title[], char speaker[], int day, int month, int year) {
    ptConf px = confChain;

    while (px -> next != NULL) {
        px = px -> next;
    }

    px -> id = id;
    px -> day = day;
    px -> month = month;
    px -> year = year;
    strcpy(px -> title, title);
    strcpy(px -> speaker, speaker);
    px -> listeners = (ptListenerList) malloc(sizeof(tListenerList));
	px -> listeners -> next = (ptListenerList) malloc(sizeof(tListenerList));
    px -> listeners -> listener = NULL;
    px -> listeners -> next -> next = NULL;
    px -> next = (ptConf) malloc(sizeof(tConf));
    px -> next -> next = NULL;
}

void removeConf(ptConf confChain, int id) {
    ptConf px = confChain;

    while (px -> next != NULL && px -> next -> id != id) {
        px = px -> next;
    }

    if (px -> next != NULL && px -> next -> id == id) {
        ptListenerList py = px -> next -> listeners -> next;

        while (py -> next != NULL) {
            removeConfFromConfList(py -> listener -> confs, px -> next);
            py = py -> next;
        }

        ptConf tmp = px -> next -> next;
        free(px -> next);
        px -> next = tmp;
    }
}

int findListenerId(ptListener listenerChain) {
    ptListener px = listenerChain;
    int max = 0;

    while (px -> next != NULL) {
        if (px -> id > max) {
            max = px -> id;
        }
		
		px = px -> next;
    }

    return max + 1;
}

ptListener newListenerChain() {
    ptListener listenerChain = (ptListener) malloc(sizeof(tListener));

    listenerChain -> prev = NULL;
    listenerChain -> next = (ptListener) malloc(sizeof(tListener));
    listenerChain -> next -> prev = listenerChain;
    listenerChain -> next -> next = NULL;
    listenerChain -> id = -1;

    return listenerChain;
}

int addListener(ptListener listenerChain, int id, char name[], int age, int level) {
    if (level < 0 || level > 5) {
        return -1;
    }

    ptListener px = listenerChain;

    while (px -> next != NULL) {
        px = px -> next;
    }

    px -> id = id;
    strcpy(px -> name, name);
    px -> age = age;
    px -> level = level;
    px -> confs = (ptConfList) malloc(sizeof(tConfList));
    px -> confs -> next = (ptConfList) malloc(sizeof(tConfList));
    px -> confs -> conf = NULL;
	px -> confs -> next -> next = NULL;
    px -> next = (ptListener) malloc(sizeof(tListener));
    px -> next -> next = NULL;
    px -> next -> prev = px;
    return 0;
}

void removeListener(ptListener listenerChain, int id) {
    ptListener px = listenerChain;

    while (px -> next != NULL && px -> next -> id != id) {
        px = px -> next;
    }

    if (px -> next != NULL && px -> next -> id == id) {
        ptConfList py = px -> next -> confs -> next;

        while (py -> next != NULL) {
            removeListenerFromListenerList(py -> conf -> listeners, px -> next);
            py = py -> next;
        }

        ptListener tmp = px -> next -> next;
        free(px -> next);
        px -> next = tmp;
        px -> next -> prev = px;
    }
}

void addConfToConfList(ptConfList confList, ptConf conf, int grade) {
	ptConfList px = confList;
	
	while (px -> next != NULL) {
		px = px -> next;
	}
	
	px -> conf = conf;
	px -> next = (ptConfList) malloc(sizeof(tConfList));
    px -> grade = grade;
	px -> next -> next = NULL;
}

void removeConfFromConfList(ptConfList confList, ptConf conf) {
    ptConfList px = confList;

    while (px -> next != NULL && px -> next -> conf != conf) {
        px = px -> next;
    }

    if (px -> next != NULL && px -> next -> conf == conf) {
        ptConfList tmp = px -> next -> next;
        free(px -> next);
        px -> next = tmp;
    }
}

void printConfList(ptConfList confList) {
	ptConfList px = confList;
	
	printf("Participation aux conferences : ");
	while (px -> next != NULL) {
		printf("%s(%d) ", px -> conf -> title, px -> grade);
		px = px -> next;
	}
	printf("\n");
}

void addListenerToListenerList(ptListenerList listenerList, ptListener listener, int grade) {
	ptListenerList px = listenerList;
	
	while (px -> next != NULL) {
		px = px -> next;
	}
	
	px -> listener = listener;
	px -> next = (ptListenerList) malloc(sizeof(tListenerList));
    px -> grade = grade;
	px -> next -> next = NULL;
}

void removeListenerFromListenerList(ptListenerList listenerList, ptListener listener) {
    ptListenerList px = listenerList;

    while (px -> next != NULL && px -> next -> listener != listener) {
        px = px -> next;
    }

    if (px -> next != NULL && px -> next -> listener == listener) {
        ptListenerList tmp = px -> next -> next;
        free(px -> next);
        px -> next = tmp;
    }
}

void printListenerList(ptListenerList listenerList) {
	ptListenerList px = listenerList;
	
	printf("Participants : ");
	while (px -> next != NULL) {
		printf("%s(%d) ", px -> listener -> name, px -> grade);
		px = px -> next;
	}
	printf("\n");
}

int participateToConf(ptConf confChain, ptListener listenerChain, int confId, int listenerId, int grade) {
    if (grade < 0 || grade > 5) {
        return -1;
    }

	ptConf px = confChain;
	ptListener py = listenerChain;
	ptListenerList pz;
	
	while (px -> next != NULL && px -> id != confId) {
		px = px -> next;
	}
	
	pz = px -> listeners -> next;
	while (pz -> next != NULL) {
		if (pz -> listener -> id == listenerId) {
			return -2;
		}
		pz = pz -> next;
	}
	
	while (py -> next != NULL && py -> id != listenerId) {
		py = py -> next;
	}
	
	if (px -> id != confId || py -> id != listenerId) {
		return -2;
	}
	
	addListenerToListenerList(px -> listeners, py, grade);
	addConfToConfList(py -> confs, px, grade);

    return 0;
}

int confGradeAvg(ptConf conf) {
    ptListenerList px = conf -> listeners -> next;
    int total = 0, nb = 0;

    while (px -> next != NULL) {
        total += px -> grade;
        nb++;
        px = px -> next;
    }

    if (nb != 0) {
        return total / nb;
    } else {
        return -1;
    }

}

int confParticipations(ptConf conf) {
    ptListenerList px = conf -> listeners -> next;
    int nb = 0;

    while (px -> next != NULL) {
        nb++;
        px = px -> next;
    }

    return nb;
}